EXHIBIT 99.1





Gasco
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Energy

                   GASCO ENERGY PROVED RESERVES INCREASE 190%

DENVER - February  23, 2005 - Gasco  Energy  (AMEX:  GSX) today  announced  2004
year-end proved reserves of 41.3 billion cubic feet equivalent (Bcfe).

2004 Proved Reserves
Gasco's  year-end,  estimated  proved  reserves were  approximately  39.7 Bcf of
natural gas and 274,074  barrels of  condensate.  Gasco's  reserves grew by 190%
over year-end 2003's estimated total of 14.2 Bcfe. The company's  reserve mix is
96% natural gas and 4% liquid hydrocarbons.  Liquids reserves include condensate
only.  Approximately  21% of total reserves are categorized as proved  developed
and 79% were proved  undeveloped.  In accordance  with SEC  guidelines,  reserve
estimates do not include any probable or possible  reserves  which may exist for
Gasco's properties.

Gasco's  estimated,  pre-tax  future net cash flows  discounted at 10% (commonly
known as the SEC  PV-10  figure)  for  proved  reserves  at year  end was  $32.3
million.  The 2004 PV-10 calculation used net year-end commodity prices of $5.24
per million  British  thermal units (MMBtu) of natural gas and $42.25 per barrel
of crude oil (Bbl).  Reserve  estimates are engineered by independent  reservoir
engineering  consultants,  Netherland  Sewell and  Associates and conform to the
definition as set forth in the SEC Regulation S-X Part 210.4-10 (a) as clarified
by subsequent  Commission  Staff Accounting  bulletins.  The proved reserves are
also in accordance  with Financial  Accounting  Standards Board Statement No. 69
requirements.




Proved Reserves at December 31, 2004
- ---------------------------- --------------------------------------- -------------------------------------------------------
                                          Net Reserves                               Future Net Revenue ($)
- ---------------------------- ---------------- ---------------------- ------------------------- -----------------------------
                                   Oil                 Gas                                            Present Worth
                                (Barrels)             (Mcf)                   Total                       at 10%
                                ---------             -----                   -----                       ------
         Category
- ---------------------------- ---------------- ---------------------- ------------------------- -----------------------------

- ---------------------------- ---------------- ---------------------- ------------------------- -----------------------------
Proved Developed
- ---------------------------- ---------------- ---------------------- ------------------------- -----------------------------
                                                                                                      
  Producing                           39,103              3,916,089                14,160,100                     7,973,500
- ---------------------------- ---------------- ---------------------- ------------------------- -----------------------------
  Non-Producing                       30,649              4,247,038                16,867,800                     6,736,100
- ---------------------------- ---------------- ---------------------- ------------------------- -----------------------------
Proved Undeveloped                   204,322             31,537,029                77,351,400                    17,592,000
                                     -------             ----------                ----------                    ----------
- ---------------------------- ---------------- ---------------------- ------------------------- -----------------------------

- ---------------------------- ---------------- ---------------------- ------------------------- -----------------------------
     Total Proved                    274,074             39,700,156            $  108,379,300                 $  32,301,600
- ---------------------------- ---------------- ---------------------- ------------------------- -----------------------------


Assumes  commodity  prices of $5.24  MMBtu of natural  gas and $42.25 per Bbl of
liquids.
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Management Comment
Mark Erickson, Gasco's President and CEO, said: "We are pleased with our reserve
growth year-over-year. Given that many wells were either in the early completion
stages or were  recently  turned to sales in the latter half of 2004, we look at
the reserves as additional  validation of our Uinta Basin geologic model. All of
the  reserves in this report are under our core Uinta Basin  Riverbend  Project,
where Gasco is focusing its capital investment. Our 2005 plan should allow Gasco
to further prove up additional  acreage as we continue  optimizing our Mesaverde
completion  techniques  and  demonstrate  additional  success  in the  Blackhawk
formation."

About Gasco Energy
Gasco  Energy,  Inc.  is a  Denver-based  natural gas and oil  exploitation  and
development  company  that  focuses on  natural-gas-rich  prospects in the Rocky
Mountain area of the United States. The Company currently is active in the Uinta
Basin in Utah and controls  acreage in the Greater Green River Basin of Wyoming.
To learn more, visit www.gascoenergy.com.


Forward-looking statements

Certain statements set forth in this press release relate to management's future
plans,  objectives and expectations.  Such statements are forward-looking within
the  meanings  of Section 27A of the  Securities  Act of 1933,  as amended,  and
Section 21E of the Securities  Exchange Act of 1934, as amended.  All statements
other than  statements  of  historical  facts  included  in this press  release,
including,  without  limitation,   statements  regarding  the  Company's  future
financial position,  potential resources,  business strategy, budgets, projected
costs and  plans  and  objectives  of  management  for  future  operations,  are
forward-looking  statements. In addition,  forward-looking  statements generally
can be  identified  by the use of  forward-looking  terminology  such as  "may,"
"will," "expect," "intend," "project," "estimate,"  "anticipate,"  "believe," or
"continue"  or  the  negative  thereof  or  similar  terminology.  Although  any
forward-looking  statements contained in this press release are to the knowledge
or in the judgment of the officers and directors of the Company,  believed to be
reasonable, there can be no assurances that any of these expectations will prove
correct  or  that  any  of  the  actions   that  are  planned   will  be  taken.
Forward-looking  statements  involve known and unknown  risks and  uncertainties
that may cause the Company's actual  performance and financial results in future
periods to differ materially from any projection, estimate or forecasted result.
Some of the key  factors  that may cause  actual  results to vary from those the
Company expects include inherent  uncertainties in interpreting  engineering and
reserve or  production  data;  operating  hazards;  delays or  cancellations  of
drilling  operations  because of weather and other natural and economic  forces;
fluctuations  in oil and  natural  gas prices in  response to changes in supply;
competition from other companies with greater resources; environmental and other
government  regulations;  defects  in  title  to  properties;  increases  in the
Company's cost of borrowing or inability or  unavailability of capital resources
to fund capital expenditures;  and other risks described under "Risk Factors" in
Item 8.01 of the Company's  Current Report on Form 8-K filed with the Securities
and Exchange Commission on October 14, 2004.

Contact for Gasco Energy, Inc.: Investor Relations: 303-483-0044

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