================================================================================
                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    FORM 10-Q
            (Mark One)
            |X|   QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                  SECURITIES EXCHANGE ACT OF 1934

                For the quarterly period ended September 30, 2001

                                       OR
            |_|   TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                  SECURITIES EXCHANGE ACT OF 1934

        For the transition period from ________________ to ______________

                        Commission File Number 001-14273

                             CORE LABORATORIES N.V.
             (Exact name of registrant as specified in its charter)

               The Netherlands                         Not Applicable
       (State or other jurisdiction of      (I.R.S. Employer Identification No.)
        incorporation or organization)

               Herengracht 424
               1017 BZ Amsterdam
               The Netherlands                         Not Applicable
     (Address of principal executive offices)            (Zip Code)


       Registrant's telephone number, including area code: (31-20)420-3191

     Indicate  by check mark  whether the  Registrant  (1) has filed all reports
required to be filed by Section 13 or 15(d) of the  Securities  Exchange  Act of
1934  during  the  preceding  12 months  (or for such  shorter  period  that the
registrant was required to file such reports),  and (2) has been subject to such
filing requirements for the past 90 days.

     Yes    X     No
         -------     -------

     The  number of  common  shares  of the  Registrant,  par value NLG 0.03 per
share, outstanding at November 6, 2001 was 33,375,228.

================================================================================

<page>
                             CORE LABORATORIES N.V.


                                      INDEX




                                                                                                      Page
                                                                                                     
Part I -- Financial Information

     Item 1 -- Financial Statements
         Consolidated Balance Sheets at September 30, 2001 and December 31, 2000...................      1
         Consolidated Statements of Operations for the Three Months ended
              September 30, 2001 and 2000..........................................................      2
         Consolidated Statements of Operations for the Nine Months ended
              September 30, 2001 and 2000..........................................................      3
         Consolidated Statements of Cash Flows for the Nine Months ended
              September 30, 2001 and 2000..........................................................      4
         Notes to Consolidated Financial Statements ...............................................      5
     Item 2-- Management's Discussion and Analysis of Financial Condition and Results of
                 Operations  ......................................................................     10
     Item 3-- Quantitative & Qualitative Disclosures of Market Risk................................     14


Part II -- Other Information

     Item 1-- Legal Proceedings....................................................................     15

     Item 2-- Changes in Securities................................................................     15

     Item 3-- Defaults Upon Senior Securities......................................................     15

     Item 4-- Submission of Matters to a Vote of Security Holders .................................     15

     Item 5-- Other Information....................................................................     15

     Item 6-- Exhibits and Reports on Form 8-K.....................................................     15

Signature     .....................................................................................     16


                                       ii



                             CORE LABORATORIES N.V.
                           CONSOLIDATED BALANCE SHEETS
                        (in thousands, except share data)


                                                                                       September 30,    December 31,
                                                                                            2001             2000
                                                                                        -----------      ----------
ASSETS                                                                                             (Unaudited)
CURRENT ASSETS:
                                                                                                  
     Cash and cash equivalents...................................................       $    13,308     $    12,519
     Accounts receivable, less allowance for doubtful accounts of
     $8,469 and $9,080 in 2001 and 2000, respectively............................           113,508         113,214
     Inventories ................................................................            45,330          33,514
     Prepaid expenses and other..................................................            11,294           7,085
     Deferred tax asset..........................................................             7,941          10,220
                                                                                        -----------     ------------
Total current assets.............................................................           191,381         176,552

PROPERTY, PLANT AND EQUIPMENT, net...............................................            95,462          84,556

INTANGIBLES AND GOODWILL, net....................................................           151,844         148,027
OTHER LONG-TERM ASSETS...........................................................             3,661           4,166
                                                                                        -----------     -----------
                Total assets.....................................................       $   442,348     $   413,301
                                                                                        ===========     ===========

LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES:
     Current maturities of long-term debt........................................       $       669     $       733
     Current lease obligations...................................................                51             247
     Accounts payable............................................................            17,275          25,931
     Other accrued expenses......................................................            27,098          28,355
                                                                                        -----------     -----------
Total current liabilities........................................................            45,093          55,266

LONG-TERM DEBT ..................................................................            97,688          83,005
LONG-TERM LEASE OBLIGATIONS......................................................                26              35
OTHER LONG-TERM LIABILITIES......................................................            20,845          23,298
MINORITY INTEREST................................................................               831             632
SHAREHOLDERS' EQUITY:
     Preference shares, NLG 0.03 par value; 3,000,000 shares authorized,
         no shares issued or outstanding.........................................                --              --
     Common shares, NLG 0.03 par value; 100,000,000 shares authorized,
         33,175,071 and 32,814,018 issued and outstanding
         at September 30, 2001 and December 31, 2000, respectively...............               545             541
     Additional paid-in capital..................................................           186,686         182,847
     Retained earnings...........................................................            90,634          67,677
                                                                                        -----------     -----------
         Total shareholders' equity..............................................           277,865         251,065
                                                                                        -----------     -----------
Total liabilities and shareholders' equity.......................................       $   442,348     $   413,301
                                                                                        ===========     ===========




                 The accompanying notes are an integral part of these
                          consolidated financial statements.

                                       1




                             CORE LABORATORIES N.V.
                      CONSOLIDATED STATEMENTS OF OPERATIONS
                 (in thousands, except share and per share data)



                                                                                            Three Months ended
                                                                                                September 30,
                                                                                        ---------------------------
                                                                                           2001              2000
                                                                                        -----------     -----------
                                                                                                (Unaudited)
                                                                                                  
SERVICES.........................................................................       $    77,321     $    70,115
SALES............................................................................            19,776          18,335
                                                                                        -----------     -----------
                                                                                             97,097          88,450
OPERATING EXPENSES:
     Cost of services............................................................            57,107          55,078
     Cost of sales...............................................................            15,337          15,203
     General and administrative expenses ........................................             4,259           3,442
     Depreciation and amortization...............................................             4,808           3,853
     Goodwill amortization.......................................................             1,062           1,046
     Other income, net...........................................................               (55)           (430)
                                                                                        -----------     -----------
                                                                                             82,518          78,192
NCOME BEFORE INTEREST
     EXPENSE AND INCOME TAX EXPENSE..............................................            14,579          10,258

INTEREST EXPENSE.................................................................             2,000           2,095
                                                                                        -----------     -----------

INCOME BEFORE INCOME TAX EXPENSE.................................................            12,579           8,163

INCOME TAX EXPENSE...............................................................             3,522           2,382
                                                                                        -----------     -----------

NET INCOME.......................................................................       $     9,057     $     5,781
                                                                                        ===========     ===========
PER SHARE INFORMATION:

     BASIC EARNINGS PER SHARE....................................................       $      0.27  $         0.18
                                                                                        ===========     ===========
     WEIGHTED AVERAGE BASIC COMMON SHARES
           OUTSTANDING...........................................................        33,165,470      32,783,862
                                                                                        ===========     ===========

     DILUTED EARNINGS PER SHARE..................................................       $      0.27     $      0.17
                                                                                        ===========     ===========
     WEIGHTED AVERAGE DILUTED COMMON SHARES
           OUTSTANDING...........................................................        33,795,537      33,724,079
                                                                                        ===========     ===========





              The accompanying notes are an integral part of these
                       consolidated financial statements.

                                       2



                             CORE LABORATORIES N.V.
                      CONSOLIDATED STATEMENTS OF OPERATIONS
                 (in thousands, except share and per share data)



                                                                                             Nine Months ended
                                                                                                September 30,
                                                                                        ---------------------------
                                                                                           2001              2000
                                                                                        -----------     -----------
                                                                                                (Unaudited)
                                                                                                  
SERVICES.........................................................................       $   224,956    $    196,045
SALES............................................................................            54,747          45,446
                                                                                        -----------     -----------
                                                                                            279,703         241,491
OPERATING EXPENSES:
     Cost of services............................................................           170,413         158,460
     Cost of sales...............................................................            43,429          36,161
     General and administrative expenses ........................................            11,803          10,128
     Depreciation and amortization...............................................            13,761          11,180
     Goodwill amortization.......................................................             3,128           3,100
     Other income, net...........................................................              (637)           (866)
                                                                                        -----------     -----------
                                                                                            241,897         218,163

INCOME BEFORE INTEREST
     EXPENSE AND INCOME TAX EXPENSE..............................................            37,806          23,328

INTEREST EXPENSE.................................................................             5,921           6,171
                                                                                        -----------     -----------
INCOME BEFORE INCOME TAX EXPENSE.................................................            31,885          17,157

INCOME TAX EXPENSE...............................................................             8,928           5,067
                                                                                        -----------     -----------

NET INCOME.......................................................................       $    22,957     $    12,090
                                                                                        ===========     ===========
PER SHARE INFORMATION:

     BASIC EARNINGS PER SHARE....................................................       $      0.69     $      0.37
                                                                                        ===========     ===========
     WEIGHTED AVERAGE BASIC COMMON SHARES
           OUTSTANDING...........................................................        33,032,668      32,247,155
                                                                                        ===========     ===========

     DILUTED EARNINGS PER SHARE..................................................       $      0.68     $      0.36
                                                                                        ===========     ===========
     WEIGHTED AVERAGE DILUTED COMMON SHARES
           OUTSTANDING...........................................................        34,005,908      33,442,389
                                                                                        ===========     ===========




              The accompanying notes are an integral part of these
                       consolidated financial statements.


                                       3



                             CORE LABORATORIES N.V.
                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (in thousands)



                                                                                             Nine Months ended
                                                                                               September 30,
                                                                                        ---------------------------
                                                                                           2001             2000
                                                                                        -----------     -----------
                                                                                                (Unaudited)
CASH FLOWS FROM OPERATING ACTIVITIES:
                                                                                                 
     Net income..................................................................       $    22,957    $     12,090
     Adjustments to reconcile net income to net cash provided
         by operating activities:
         Depreciation and amortization...........................................            16,889          14,280
         Gain on sale of fixed assets............................................              (148)           (495)
     Changes in assets and liabilities:
         (Increase)/Decrease in accounts receivable..............................               124          (9,855)
         Increase in inventories.................................................            (6,411)        (11,661)
         (Increase)/Decrease in prepaid expenses.................................            (4,084)            162
         Increase/(Decrease) in accounts payable.................................            (8,720)            785
         Decrease in other accrued expenses......................................            (1,810)         (8,744)
         (Increase)/Decrease in net deferred tax asset...........................               (29)          1,085
         Increase/(Decrease) in other long-term liabilities......................               (69)            203
         Other...................................................................            (1,962)          2,022
                                                                                        -----------     -----------
              Net cash provided by operating activities..........................            16,737            (128)
                                                                                        -----------     -----------
CASH FLOWS FROM INVESTING ACTIVITIES:
     Capital expenditures........................................................           (20,817)        (25,880)
     Acquisitions, net of cash acquired..........................................           (12,735)             --
     Proceeds from sale of fixed assets..........................................               201           2,211
     Other ......................................................................               (90)            508
                                                                                        -----------     -----------
         Net cash used in investing activities...................................           (33,441)        (23,161)
                                                                                        -----------     -----------
CASH FLOWS FROM FINANCING ACTIVITIES:
     Payments of long-term debt..................................................            (6,124)        (19,550)
     Borrowings under long-term debt.............................................            20,716          21,316
     Capital lease obligation, net...............................................              (203)         (1,491)
     Net proceeds from exercise of over-allotment................................                 -          17,303
     Exercise of stock options...................................................             2,720           2,523
     Other.......................................................................               384            (559)
                                                                                        -----------     -----------
         Net cash provided by financing activities...............................            17,493          19,542
                                                                                        -----------     -----------
NET CHANGE IN CASH...............................................................               789          (3,747)
CASH, beginning of period........................................................            12,519          18,845
                                                                                        -----------     -----------
CASH, end of period..............................................................       $    13,308     $    15,098
                                                                                        ===========     ===========



              The accompanying notes are an integral part of these
                       consolidated financial statements.


                                        4



                             CORE LABORATORIES N.V.
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                                   (Unaudited)


1.   BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES

Principles of Consolidation

     The accompanying unaudited consolidated financial statements include the
accounts of Core Laboratories and have been prepared in accordance with United
States ("U.S.") generally accepted accounting principles ("GAAP") for interim
financial information using the instructions to Form 10-Q and Article 10 of
Regulation S-X. Accordingly, they do not include all of the information and
footnotes required by GAAP for complete financial statements. In the opinion of
management, all adjustments considered necessary for a fair presentation have
been included. Operating results for the nine month period ended September 30,
2001 are not necessarily indicative of the results that may be expected for the
year ending December 31, 2001. Balance sheet information as of December 31, 2000
was derived from the 2000 annual audited financial statements. These financial
statements should be read in conjunction with the financial statements and the
summary of significant accounting policies and notes thereto included in our
Form 10-K for the year ended December 31, 2000.

Recent Pronouncements

      In June 2001, the Financial Accounting Standards Board ("FASB") issued two
statements, SFAS 141, "Business Combinations", and SFAS 142, "Goodwill and Other
Intangible Assets", that amend Accounting Principles Board ("APB") Opinion No.
16, "Business Combinations", and supersede APB Opinion No. 17, "Intangible
Assets." The two statements modify the method of accounting for business
combinations entered into after June 30, 2001 and address the accounting for
intangible assets. Goodwill resulting from a business combination after June 30,
2001 would be recognized as an asset but not amortized while goodwill existing
at June 30, 2001 will be amortized through December 31, 2001. Beginning January
1, 2002, we will no longer amortize goodwill but will test for impairment
annually or more frequently if circumstances indicate a potential impairment.
While we do not expect an impairment to arise, we are evaluating the impact of
the new accounting standards on existing goodwill and other intangible assets.
Goodwill amortization for the three and nine month periods ended September 30,
2001 was $1,062,000 and $3,128,000, respectively, which had an earnings per
diluted share impact of $0.03 and $0.09 for the respective periods.

2.   ACQUISITIONS

     On August 1, 2001, we acquired all of the assets of Tesco Corporation's
Gris Gun business for approximately $12.7 million. Gris Gun supplies wellbore
perforating gun systems and other related completion products primarily to the
Canadian market. The transaction was accounted for using the purchase method of
accounting and resulted in an increase in goodwill of approximately $5.9
million.

     On May 22, 2001, we acquired all of the outstanding shares of PROMORE
Engineering Inc. ("PROMORE"), a privately held company based in Canada. PROMORE
provides innovative solutions for production optimization and monitoring of
reservoir environments. We issued approximately 606,000 shares in exchange for
all of the outstanding shares of PROMORE. The


                                       5



transaction was accounted for
using the pooling-of-interests method of accounting. Accordingly, our
consolidated financial statements have been restated for all periods prior to
the date of acquisition to include the financial position and results of
operations of PROMORE.

3.   INVENTORIES

     Inventories consist primarily of manufactured goods, materials and supplies
used for sales or services provided to customers. Inventories are stated at the
lower of average or standard cost (including direct material, labor and
overhead) or estimated net realizable value and are reflected net of valuation
reserves of $2,305,000 and $1,376,000 at September 30, 2001 and December 31,
2000, respectively. Inventories consisted of the following (in thousands):

                                               September 30,       December 31,
                                                    2001                2000
                                                 ----------         ----------
                                                          (Unaudited)
Finished goods.................................. $   34,132         $   27,145
Parts and materials.............................      6,562              4,126
Work in process.................................      4,636              2,243
                                                 ----------         ----------
                Total........................... $   45,330         $   33,514
                                                 ==========         ==========

                                       6



4.   INTANGIBLES AND GOODWILL

     Intangibles include patents, trademarks, service marks and trade names.
Goodwill represents the excess of purchase price over the value of the net
assets acquired in acquisitions accounted for as purchases. Intangibles and
goodwill acquired prior to July 1, 2001 are charged to expense in equal amounts
over their estimated useful lives. We believe that there have been no events or
circumstances that warrant revision to the remaining useful lives or which
affect the recoverability of intangibles and goodwill. Additional information
relating to intangibles and goodwill is included in Note 1. The components of
intangibles and goodwill are as follows (in thousands):



                                                         Original
                                                           Life       September 30,    December 31,
                                                         in Years          2001            2000
                                                        ---------      ------------    ------------
                                                                               (Unaudited)
                                                                              (in thousands)

                                                                             
  Acquired trade secrets...........................          5         $        165    $        125
  Acquired patents, trademarks and trade names.....        10-20              4,539           3,686
  Acquired trade name..............................         40                4,614           4,614
                                                                       ------------    ------------
           Total intangibles.......................                           9,318           8,425
                                                                       ------------    ------------

  Goodwill.........................................        5-10               2,882           2,639
  Goodwill.........................................         20                3,736           3,736
  Goodwill.........................................         40              148,099         147,784
  Goodwill.........................................         N/A               5,905              --
                                                                       ------------    ------------
           Total goodwill..........................                         160,622         154,159
                                                                       ------------    ------------
                Total intangibles and goodwill.....                         169,940         162,584
  Less - accumulated amortization..................                          18,096          14,557
                                                                       ------------    ------------
                     Net intangibles and goodwill..                    $    151,844    $    148,027
                                                                       ============    ============


5.   LONG-TERM DEBT

     Long-term debt is summarized in the following table (in thousands):



                                                                  September 30,   December 31,
                                                                      2001            2000
                                                                  -----------     ------------
                                                                          (Unaudited)
                                                                            
    Credit Facility with a bank group:
     $100,000 revolving debt facilities...................        $    22,000     $      7,000
    Senior Notes.....................                                  75,000           75,000
    Other indebtedness....................................              1,357            1,738
                                                                  -----------     ------------
             Total debt...................................             98,357           83,738
    Less - current maturities.............................                669              733
                                                                  -----------     ------------
             Total long-term debt.........................        $    97,688     $     83,005
                                                                  ===========     ============


     In July 1999, we entered into a $100 million Credit Facility which provides
for (i) a committed revolving debt facility of $95 million and (ii) a
Netherlands guilder denominated revolving debt facility with U.S. dollar
equivalency of $5 million. At September 30, 2001, approximately $78 million was
available for borrowing under the revolving debt facility. Loans under the
Credit Facility bear interest at rates which range from LIBOR plus 1.25% to a
maximum of LIBOR plus 1.75%.

                                       7


The interest rate in effect at September 30, 2001
was 4.25% and the average for 2001 was 5.75%. The revolving debt facilities
require interest payments only, until maturity in June 2004.

     In July 1999, we issued $75 million in Senior Notes which bear an average
interest rate of 8.16% and require annual principal payments beginning in July
2005 and continuing through July 2011.

     The terms of the Credit Facility and Senior Notes require us to meet
certain financial covenants, including certain minimum equity and cash flow
tests. We believe that we are in compliance with all such covenants contained in
our credit agreements. All of our material subsidiaries are guarantors or
co-borrowers under both credit agreements.

6.   SEGMENT REPORTING

     Our business units have been aggregated into three complementary segments
which provide products and services for improving reservoir performance and
increasing oil and gas recovery from new and existing fields.

o        Reservoir  Description:  Encompasses  the  characterization  of
         petroleum  reservoir rock,  fluid and gas samples.  We provide
         analytical and field services to characterize properties of crude
         oil and petroleum products to the oil and gas industry.

o        Production Enhancement: Includes products and services relating to
         reservoir well completions, perforations, stimulations and production.
         We provide integrated services to evaluate the effectiveness of well
         completions and to develop solutions aimed at increasing the
         effectiveness of enhanced oil recovery projects.

o        Reservoir Management: Combines and integrates information from
         reservoir description and production enhancement services to increase
         production and improve recovery of oil and gas from our clients'
         reservoirs.

                                       8



Segment Analysis

     We manage our business segments separately due to the different
technologies each segment utilizes and requires. Results of these segments are
presented below using the same accounting policies as used to prepare the
Consolidated Balance Sheets and Statements of Operations. We evaluate
performance based on income or loss from operations before income tax, interest
and other non-operating income (expense). Summarized financial information
concerning our segments is shown in the following table (in thousands):



                                                   Three months ended September 30,  Nine months ended September 30,
                                                      ----------------------------------------------------------
                                                           2001          2000               2001           2000
                                                      ----------------------------------------------------------
                                                                              (Unaudited)
     Revenues:
                                                                                          
     Reservoir Description........................... $   56,368     $   48,159        $  157,817     $  139,871
     Production Enhancement..........................     27,781         27,457            79,543         66,557
     Reservoir Management............................     12,948         12,834            42,343         35,063
                                                      ----------     ----------        ----------     ----------
           Consolidated.............................. $   97,097     $   88,450        $  279,703     $  241,491
                                                      ==========     ==========        ==========     ==========

     Income (Loss) Before Interest and Taxes:
     Reservoir Description........................... $   10,459     $    5,845        $   24,728     $   14,654
     Production Enhancement..........................      5,136          4,400            13,839         11,175
     Reservoir Management............................       (993)            34              (688)        (2,428)
     Corporate and Other (a).........................        (23)           (21)              (73)           (73)
                                                      ----------     ----------        ----------     ----------
           Consolidated.............................. $   14,579     $   10,258        $   37,806     $   23,328
                                                      ==========     ==========        ==========     ==========


     a) "Corporate and Other" represents those items that are not directly
related to a particular segment.


7.   EARNINGS PER SHARE

     We present earnings per share in accordance with SFAS No. 128, "Earnings
per Share" which requires dual presentation of both basic and diluted earnings
per share on the Consolidated Statement of Operations. Basic earnings per common
share is computed by dividing net income available to common stockholders by the
weighted average number of common share outstanding during the period. Diluted
earnings per share reflects the net additional shares which would be issued if
all dilutive stock options outstanding were exercised. The following table
summarizes the calculation of weighted average common shares outstanding used in
the computation of earnings per share:



                                                    Three months ended September 30,     Nine months ended September 30,
                                                   --------------------------------      --------------------------------
                                                          2001            2000                2001              2000
                                                   --------------    --------------      --------------    --------------
                                                                                                   
Weighted average basic common
   shares outstanding.......................           33,165,470        32,783,862          33,032,668        32,247,155
Effect of dilutive stock options (a)........              630,067           940,217             973,240         1,195,234
                                                   --------------    --------------      --------------    --------------
Weighted average diluted
   common shares outstanding................           33,795,537        33,724,079          34,005,908        33,442,389
                                                   ==============    ==============      ==============    ==============

a) Options totaling 1,071,551 and 9,676 equivalent common shares for the three
months ended September 30, 2001 and 2000, and 51,801 and 61,676 for the nine
months ended for the same period, respectively were not included because the
impact of these options was anti-dilutive.


                                       9


                             CORE LABORATORIES N.V.
                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                  FINANCIAL CONDITION AND RESULTS OF OPERATIONS

General

     This discussion includes forward-looking statements within the meaning of
Section 27A of the Securities Act of 1933 and Section 21E of the Securities
Exchange Act of 1934. We have based the forward-looking statements relating to
our operations on our current expectations, estimates and projections. We
caution you that these statements are not guarantees of future performance and
involve risks and uncertainties that we cannot predict. In addition, we have
based many of these forward-looking statements on assumptions about future
events that may prove to be inaccurate. Accordingly, our actual outcomes and
results may differ materially from what we have expressed or forecast in the
forward-looking statements. Our operations are subject to various risk and other
factors including, but not limited to:

o    our ability to continue to develop or acquire new and useful technology.
o    the realization of anticipated synergies from acquired businesses and
     future acquisitions.
o    our  dependence on the oil and gas industry,  and the impact of commodity
     prices on the  expenditure  levels of our customers.
o    competition in our markets.
o    the risks and uncertainties attendant to adverse industry, political,
     economic and financial market conditions, including stock prices,
     government regulations, interest rates and credit availability.

     Core Laboratories was established in 1936 and is one of the world's leading
providers of proprietary and patented reservoir description, production
enhancement and reservoir management services to the oil and gas industry. These
services are directed toward enabling our clients to improve reservoir
performance and increase oil and gas recovery from their producing fields. We
have over 70 offices in more than 50 countries and have approximately 4,350
employees.

Results of Operations

     Service revenues for the third quarter of 2001 increased $7.2 million, or
10% over the same period last year. Service revenues for the nine month period
ended September 30, 2001 increased $28.9 million, or 15% over the same period
last year.

     Cost of services expressed as a percentage of service revenue was 74% and
79% in the third quarter of 2001 and the same period last year, respectively.
For the nine month periods ended, the cost of services expressed as a percentage
of service revenue were 76% and 81%, respectively.

     Sales revenues increased $1.4 million to $19.8 million in the third quarter
of 2001 from $18.3 million in the third quarter of 2000, an 8% increase. Sales
revenue for the nine month period ended September 30, 2001 increased $9.3
million to $54.7 million from $45.4 million in the same period in 2000, a 21%
increase.

     Cost of sales in the third quarter of 2001 were 78% of sales revenue as

                                       10

compared to 83% in the same period last year. For the nine month period ended
September 30, 2001 cost of sales was 79% as compared to 80% from the prior year.

     General and administrative expenses are comprised of corporate management
and centralized administrative services which benefit our operating
subsidiaries. Although general and administrative expenses are generally more
fixed in nature as a percentage of revenues, we did experience an increase of
$0.8 million and $1.7 million for the three and nine month periods ended
September 30, 2001, respectively, as compared to the corresponding periods in
2000. These increases were largely attributable to growth in the number of
people necessary to support increases in the scope of our operations. General
and administrative expenses as a percentage of revenues remained below 5% for
both periods.

     Depreciation and amortization expense for the third quarter of 2001
increased $1.0 million and $2.6 million for the three and nine month periods
ended September 30, 2001 as compared to the corresponding periods in 2000. This
increase was due to additional capital investments, which include the new
Houston facility.

     The effective income tax rate decreased to 28% for the three and nine month
periods ended September 30, 2001 from 29% and 30% in the corresponding periods
in 2000. This rate change reflects the increase in international earnings taxed
at rates lower than The Netherlands statutory rate.

Segment Analysis
(Dollars in Thousands)



                                                    Three months ended September 30,  Nine months ended September 30,
                                                      ----------------------------------------------------------
                                                           2001          2000               2001           2000
                                                      ----------------------------------------------------------
                                                                              (Unaudited)
     Revenues:
                                                                                          
     Reservoir Description........................... $   56,368     $   48,159        $  157,817     $  139,871
     Production Enhancement..........................     27,781         27,457            79,543         66,557
     Reservoir Management............................     12,948         12,834            42,343         35,063
                                                      ----------     ----------        ----------     ----------
           Consolidated.............................. $   97,097     $   88,450        $  279,703     $  241,491
                                                      ==========     ==========        ==========     ==========

     Income (Loss) Before Interest and Taxes:
     Reservoir Description........................... $   10,459     $    5,845        $   24,728     $   14,654
     Production Enhancement..........................      5,136          4,400            13,839         11,175
     Reservoir Management............................       (993)            34              (688)        (2,428)
     Corporate and Other (a).........................        (23)           (21)              (73)           (73)
                                                      ----------     ----------        ----------     ----------
           Consolidated.............................. $   14,579     $   10,258        $   37,806     $   23,328
                                                      ==========     ==========        ==========     ==========


     a) "Corporate and Other" represents those items that are not directly
related to a particular segment.

Reservoir Description

     Revenues for the Reservoir Description segment were $56.4 million for the
third quarter of 2001 compared to $48.2 million in the third quarter of 2000.
Revenues for the nine month period ended September 30, 2001 were $157.8 million
compared to $139.9 million in the same period last year. These increases were
due in part to increased demand from international field development projects

                                       11

greater utilization of our higher technology services as well as synergies
realized from recent acquisitions.

     Income before interest and taxes increased by $4.6 million in the third
quarter of 2001 and $10.1 million in the nine month period ended September 30,
2001, compared to the same periods in 2000 due to higher revenues and improved
margins of our petroleum service unit.

Production Enhancement

     Revenues from the Production Enhancement segment were $27.8 million in
the third quarter of 2001 compared to $27.5 million in the same period in the
prior year. For the nine month period ended September 30, 2001, revenues
increased $13.0 million to $79.5 million, an increase of 20%. These increases
were due to the active North American natural gas market and an increase in the
overall workload. We have also realized increased levels of market acceptance
for our Completion Profiler(TM) and PackScan(TM) technologies. Earnings before
interest and taxes in the third quarter of 2001 were up 17% to $5.1 million and
24% to $13.8 million for the nine month period ended September 30, 2001 compared
to the same periods in 2000.

Reservoir Management

     Revenues from the Reservoir Management segment in the third quarter of
2001 were relatively consistent with the third quarter of 2000 while revenues
for the nine month period ended September 30, 2001 increased $7.3 million
compared to the same period in 2000. The increase in the nine month period was
due in part to projects initiated in South America and the Far East. Our
continuing efforts to reduce our cost structure in this segment resulted in a
restructuring of the seismic and engineering field study groups. Expenses
related to staff reductions and the restructuring contributed to the loss before
interest and taxes for the third quarter of 2001 of $1.0 million compared to
minimal earnings in the same period in 2000. The loss before interest and taxes
for the nine month period ended September 30, 2001 were $0.7 million compared to
a loss of $2.4 million in the same period in 2000.

Liquidity and Capital Resources

     We have historically financed our activities through cash flows from
operations, bank credit facilities, equity financing and the issuance of debt.

     During the nine month period ending September 30, 2001, cash flows from
operating activities were $16.7 million, an increase of $16.9 million from the
same period in 2000. At September 30, 2001, we had working capital of $146.3
million and a current ratio of 4.2 to 1.0, compared to working capital of $121.3
million and a current ratio of 3.2 to 1.0 at December 31, 2000. We are a
Netherlands holding company and we conduct substantially all of our operations
through subsidiaries. Consequently, our cash flow is dependent upon the ability
of our subsidiaries to pay cash dividends or otherwise distribute or advance
funds to us.

     Our financing activities provided $17.5 million in the nine month period
ending September 30, 2001, and $19.5 million in the same period in 2000. Our
investing activities used $33.4 million in the nine month period ending
September 30, 2001 compared to $23.2 million in the same period in 2000.
The major financing and investing activities in these periods were as follows:

                                       12


o    In July 2001, we borrowed approximately $13.0 million to finance the
     acquisition of Gris Gun.
o    In June 2000, we received net proceeds of approximately $17.3 million from
     the exercise of the underwriters' over-allotment option associated with the
     equity offering. These proceeds were used principally to reduce
     indebtedness and fund capital expenditures.
o    Capital  expenditures  were $20.8 million for the nine month period ending
     September 30, 2001, and $25.9 million in the same period in 2000.

     Our ability to maintain and grow our operating income and cash flows is
dependent upon continued investing activities. We believe our future cash flows
from operations, supplemented by our borrowing capacity and issuances of
additional equity should be sufficient to fund debt requirements, capital
expenditures, working capital and future acquisitions.

                                       13


                             CORE LABORATORIES N.V.
             QUANTITATIVE AND QUALITATIVE DISCLOSURES OF MARKET RISK

     We are exposed to market risk, which is the potential loss arising from
adverse changes in market prices and rates. We do not enter, or intend to enter,
into derivative financial instruments for hedging or speculative purposes. We do
not believe that our exposure to market risks, which are primarily related to
interest rate changes and fluctuations in foreign exchange rates, are material.
During 1999, we issued fixed rate Senior Notes denominated in U.S. dollars. The
proceeds were used to pay off variable rate term loans. This significantly
reduced our exposure to market risk. This section should be read in conjunction
with "Note 5 - Long-Term Debt" of the Notes to Consolidated Financial
Statements.

                                       14



                             CORE LABORATORIES N.V.
                          PART II -- OTHER INFORMATION


Item 1.     Legal Proceedings.

     We are from time to time subject to legal proceedings and claims that arise
in the ordinary course of business. We believe that the outcome of current legal
actions will not have a material adverse effect upon our consolidated financial
position or results of operations.

Item 2.  Changes in Securities.

     In connection with our 2001 acquisitions, we issued approximately 606,000
common shares. Disclosure related to recent issuances of common shares is
included in Note 2 of the Notes to Consolidated Financial Statements. With
respect to the shares issued in each acquisition, we relied on exemption from
registration under Section 4(2) of the Securities Act of 1933.

Item 3.     Defaults Upon Senior Securities.

     None

Item 4.   Submission of Matters to a Vote of Security Holders.

     None

Item 5.    Other Information.

     None

Item 6.   Exhibits and Reports on Form 8-K.

(a)      Exhibits

         None


     (b) Reports on Form 8-K

         None

                                       15



                                    SIGNATURE

     Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant, Core Laboratories N.V., has duly caused this report to be signed on
its behalf by the undersigned thereunto duly authorized.


                                       CORE LABORATORIES N.V.
                                       by:  Core Laboratories International B.V.



Dated: November 14, 2001               By: /s/ Richard L. Bergmark
                                       -------------------------------------
                                       Richard L. Bergmark
                                       Chief Financial Officer



                                       16