Exhibit 99.1

          NGP Capital Resources Company Announces Portfolio Investment


     HOUSTON--(BUSINESS WIRE)--Sept. 11, 2006--NGP Capital Resources Company
(NASDAQ:NGPC) ("the Company") today announced that it has closed on a
participation in a $325 million Second Lien ("Term Loan") for Energy XXI Gulf
Coast, Inc., a wholly-owned subsidiary of Energy XXI Ltd., a Houston, Texas
based oil and gas producer. The Company has invested $14 million in the
syndicated Term Loan.
     The Term Loan earns interest at LIBOR plus 550 basis points and is secured
by second liens on substantially all of Energy XXI's properties. Proceeds from
the Term Loan will be used to acquire oil and gas assets and to refinance
existing indebtedness.
     Following these transactions, the Company has committed and made available
for funding an approximate total of $235 million to fourteen portfolio
companies, with approximately $197 million currently outstanding.

     About NGP Capital Resources Company

     NGP Capital Resources Company is a non-diversified, closed-end management
investment company that has elected to be treated as a business development
company under the Investment Company Act of 1940. The Company's investment
portfolio is principally in energy related private companies. From time to time,
the Company may also invest in public companies. The Company invests primarily
in senior secured and mezzanine loans in furtherance of its business plan and in
some instances receives equity investments in portfolio companies in connection
with such investments. NGP Capital Resources Company is managed by NGP
Investment Advisor, LP, an affiliate of NGP Energy Capital Management. NGP
Energy Capital Management, based in Irving, Texas, is a leading investment firm
with over $3.6 billion of cumulative capital under management since inception,
serving all sectors of the energy industry.
     This press release may contain forward-looking statements. These
forward-looking statements are subject to various risks and uncertainties, which
could cause actual results and conditions to differ materially from those
projected, including the uncertainties associated with the timing of transaction
closings, changes in interest rates, availability of transactions, the future
operating results of our portfolio companies, changes in regional, national, or
international economic conditions and their impact on the industries in which we
invest, or changes in the conditions of the industries in which we invest, and
other factors enumerated in our filings with the Securities and Exchange
Commission.
     We may use words such as "anticipates," "believes," "expects," "intends,"
"will," "should," "may" and similar expressions to identify forward-looking
statements. Undue reliance should not be placed on such forward-looking
statements as such statements speak only as of the date on which they are made.
We do not undertake to update our forward-looking statements unless required by
law.
     Persons considering an investment in NGP Capital Resources Company should
consider the investment objectives, risks, and charges and expenses of the
company carefully before investing. Such information and other information about
the company is available in our annual report on Form 10-K, in our quarterly
reports on Form 10-Q and in prospectuses we issue from time to time in
connection with our offering of securities. Such materials are filed with the
SEC and copies are available on the SEC's website, www.sec.gov. Prospective
investors should read such materials carefully before investing.


     CONTACT: NGP Capital Resources Company, Houston
              Investment Contact:
              John Homier, 713-752-0062
              jhomier@ngpcrc.com
              or
              Kelly Plato, 713-752-0062
              kplato@ngpcrc.com
              or
              Investor Relations Contact:
              Steve Gardner, 713-752-0062
              investor_relations@ngpcrc.com