VAALCO Energy Mails Letter to Stockholders

Says Public Records of Nanes Delorme Partners and Pilatus Energy Are Rife with Conflicts and Scandal Urges Stockholders to Protect Their Investment and Support VAALCO's Board by Voting the WHITE Proxy Card Today

HOUSTON--(BUSINESS WIRE)--

VAALCO Energy, Inc. (NYSE: EGY) today sent the following letter to stockholders in connection with the Annual Meeting of Stockholders on June 4, 2008.

VAALCO's Board unanimously recommends stockholders vote "FOR" the Company's three highly qualified and experienced directors - W. Russell Scheirman, Arne R. Nielsen and William S. Farish - by signing, dating and returning the WHITE proxy card today.

"We are successfully executing our strategy, driving superior stock price performance and expect 2008 to be a break-out year for VAALCO," said Robert L. Gerry, III, VAALCO's Chairman and CEO. "However, we are deeply concerned that Nanes Delorme Partners' and Pilatus Energy's short-term, self-serving agenda would threaten the Company and our record of value creation. We urge VAALCO stockholders to protect their investment by voting on the white proxy card today and discarding any materials they receive from Nanes Delorme Partners and Pilatus Energy."

    The full text of VAALCO's letter follows:

    May 15, 2008

    Dear Fellow Stockholder:

The future value of your VAALCO investment is at risk because of Nanes Delorme Partners, a New York based hedge fund, and its recently revealed secret partner, Pilatus Energy. Should they succeed in their attempt to install their own paid, hand-picked representatives onto VAALCO's Board, Nanes Delorme Partners and Pilatus Energy say they would pursue "mergers and/or the sale of the entire Company."

You should know - We have confidence in our business plan and regularly evaluate the opportunities available to the Company. As part of these efforts, VAALCO's Board, together with independent financial and legal advisers, reviewed the Company's strategic alternatives earlier this year, including a potential merger or sale. This process affirmed the Board's belief that a sale of VAALCO at this time would prevent stockholders from realizing the value that lies within VAALCO's exploration portfolio.

To help ensure that you realize the value you deserve, VAALCO's Board unanimously recommends that stockholders vote FOR the Board's director nominees - W. Russell Scheirman, Arne R. Nielsen and William S. Farish - and sign, date and return the enclosed WHITE proxy card today.

              WE STAND BY OUR RECORD OF ACCOMPLISHMENTS

VAALCO's Board and management team are active, engaged and successfully executing on the Company's strategy. Nanes Delorme Partners' claim to the contrary simply ignores the facts:

    --  VAALCO has delivered superior stock price performance. VAALCO
        has outperformed its peer group and the broader market as a
        whole over the last six month, one, three and five year
        periods. Indeed, our stock performance has exceeded our
        peers(1) by 25%, 20%, 23%, and 167% in each of those periods,
        respectively(2).

    --  VAALCO's operating performance is among the best in the
        industry. Since 2000, 80% of the exploration and appraisal
        wells drilled by the Company have been successful. We also
        have a 100% success rate with our development wells on the
        Etame Block, our principal producing asset. These are
        exceptional drilling success rates in our industry.

    --  VAALCO's financial performance is strong. Revenues, cash flows
        and earnings per share have consistently increased in nearly
        every year. VAALCO's average return on invested capital (ROIC)
        over the last five years is 30.7% and in the top 5% of our
        industry.

We are confident in our ability to build on this strong operating and financial track record. We believe 2008 will be a break-out year for your company and for the value of your VAALCO shares.


    --  VAALCO's exploration program, which includes seven planned
        exploration wells, will expose the Company to in excess of 50
        million net barrels compared to VAALCO's current 6.2 million
        barrels of proved reserves. This represents an eight-fold
        potential increase. We have rigs arranged to commence drilling
        this summer.

    --  We expect continued significant increases in stockholder value
        in the near-term. VAALCO's stock price historically surges
        when the Company moves from the property acquisition and
        seismic phase to the drilling phase - and this is precisely
        where we believe we are now.

 THE PUBLIC RECORDS OF NANES DELORME PARTNERS AND PILATUS ENERGY ARE
                    RIFE WITH CONFLICTS AND SCANDAL

Nanes Delorme Partners and Pilatus Energy appear to be concealing what the public record makes clear - Nanes Delorme Partners and Pilatus Energy are conflicted and their ethics tainted by a scandal involving corruption, kickbacks, fraud and embezzlement. You deserve to know the following:

  The Public Record on Nanes
        Delorme Partners*        The Public Record on Pilatus Energy*
----------------------------------------------------------------------
Nanes Delorme Partners only      Pilatus Energy is a limited partner
 recently purchased its VAALCO    of Nanes Delorme Partners. It
 shares and more than half of     recently purchased 2,700,000 shares
 its shares were transferred      of VAALCO between 11/28/2007 and
 from Pilatus Energy on           01/30/2008.
 02/14/2008.
                                 Source: Nanes Delorme Partners
Source: Nanes Delorme Partners    revised preliminary proxy statement
 definitive proxy statement       filed with the Securities and
 filed with the Securities and    Exchange Commission on 05/05/2008.
 Exchange Commission on
 05/07/2008                      (Notably, Nanes Delorme Partners'
                                  prior preliminary proxy statement
                                  filed on 04/25/2008 did not mention
                                  Pilatus Energy by name, but only
                                  referred to an unnamed "limited
                                  partner.")
---------------------------------=====================================
Nanes Delorme Partners I LP is a Pilatus is comprised of Pilatus
 New York based hedge fund that   Energy and Pilatus Ressources (sic)
 invests primarily in the oil     which are two companies based in
 and gas exploration and          Zug, Switzerland. Pilatus has
 production sector.               positions in the majority of the
                                  African and Middle East countries.
Source: Nanes Delorme Partners
 press release, 04/24/2008       Source: Pilatus Energy press release,
                                  01/31/2008
----------------------------------------------------------------------
Julien Balkany, a 27-year old    "...Pilatus Energy and Pilatus
 French citizen, paid Nanes       Resources, two companies run from
 Delorme Partners employee, and   behind the scenes by France's Loik
 nominee to your board is         Le Floch-Prigent..."
 leading Nanes Delorme Partners'
 proxy campaign.                 Source: Africa Energy Intelligence,
                                  "Abbas I. Yousef Al Yousef,"
Source: Nanes Delorme Partners    12/19/2007
 revised preliminary proxy
 statement filed with the        "The name of the former Elf CEO
 Securities and Exchange          doesn't appear on their list of
 Commission on 05/05/2008; Nanes  executives but it is he who makes
 Delorme Partners press release,  all of their investment decisions."
 05/08/2008
                                 Source: Africa Energy Intelligence,
                                  "Le Floch-Prigent's New
                                  Incarnation," 12/05/2007
----------------------------------------------------------------------
  The Public Record on Nanes
        Delorme Partners*        The Public Record on Pilatus Energy*
-------------------------------- -------------------------------------
Nanes Delorme Partners is paying "France's mammoth Elf corruption
 its two other nominees $25,000   case, probably the biggest political
 simply to stand for election     and corporate sleaze scandal to hit
 and additional monies if they    a western democracy since the second
 fail.                            world war."

Source: Nanes Delorme Partners   Source: The Guardian, "Gigantic
 definitive proxy statement       Sleaze Scandal Winds Up as Former
 filed with the Securities and    Elf Oil Chiefs Are Jailed,"
 Exchange Commission on           11/13/2003
 05/07/2008
                                 "Le Floch-Prigent, 60, and a former
(While Nanes Delorme Partners'    Elf director, Alfred Sirven, 76, are
 nominees may have no             both already serving time after
 affiliation with your company,   losing appeals earlier this year
 these payments show that they    against separate convictions over
 are by no means independent      corruption at Elf, since absorbed
 from Nanes Delorme Partners.)    into the Franco-Belgian oil company
                                  Total. Both have admitted some of
                                  the charges against them during the
                                  four-month trial."

                                 Source: Associated Press, "Verdicts
                                  Expected in France's Biggest-Ever
                                  Graft Scandal," 11/12/2003
================================--------------------------------------
Nanes Delorme is a broker for    "In a matter of months, the small
 the sale of oil and gas assets,  Swiss group Pilatus Energy has built
 including those of VAALCO's      up an African portfolio with the
 competitors. "In recent years,   help of a few middlemen who can
 Nanes Delorme advised Afren on   knock on presidential doors...In
 buying up the stake of Gulf      September, it was awarded the Ngoki
 Energy Resources in Angola's     concession in the Mossaka region
 Cabinda Central concession and   thanks to the advice of the former
 on acquiring Heritage's          chief executive of Elf, Loik Le
 interests in Congo-              Floch-Prigent, who negotiated with
 Brazzaville."                    the Congolese officials on Pilatus'
                                  behalf."
Source: Africa Energy
 Intelligence, "The New African  Source: Africa Energy Intelligence,
 Oil Trail Blazers," 02/20/2008   "Pilatus Has Right Connections,"
                                  11/29/2006

                                 (These activities are competitive
                                  with VAALCO's core operations.)
================================-=====================================

* Permission to use quotations neither sought nor obtained.

ASK YOURSELF: If this information is available simply from the public record, what else about Nanes Delorme Partners and Pilatus Energy has yet to be revealed?

      NANES DELORME PARTNERS' SELECTIVE AND DISTORTED STATEMENTS

In its proxy materials, Nanes Delorme Partners has made a number of misleading assertions. Their deliberate repetition of these claims, despite what they now know to be true, raises further questions in our view about their ethical standards.

-- Nanes Delorme Partners Distortion: "We believe our Nominees have
    the experience and oil and gas expertise necessary to oversee an
    effort to maximize stockholder value."
   -------------------------------------------------------------------

   The facts: One of Nanes Delorme Partners' nominees, Julien Balkany,
    is only 27-years old, so we question how much oil and gas
    experience he has had. Tellingly, Nanes Delorme Partners also
    states that if its nominees are elected they will propose closing
    VAALCO's Aberdeen, Scotland office. This demonstrates their lack
    of understanding of the Company and the industry since Aberdeen is
    where all of the drilling professionals for VAALCO's operations
    are based and is an established international center for drilling
    expertise.
   -------------------------------------------------------------------

   Collectively, your Board already has more than 100 years of
    experience in the oil and gas industry, including international
    exploration and development expertise. Your current Board members
    also have, and VAALCO has succeeded based on, other complementary
    skills and experience, including geology and geophysics, finance
    and accounting, investment banking and tax law.

-- Nanes Delorme Partners Distortion: "VAALCO's stock price has
    continued to trade at a substantial discount to VAALCO's E&P
    peers... VAALCO recently has traded at a total enterprise value to
    2008 estimated EBITDA of approximately 3.1x."
   -------------------------------------------------------------------

   The facts: VAALCO's stock has unequivocally outperformed its peers
    over the last six month, one, three and five year periods. The
    charts we've published in our May 8th letter to stockholders prove
    VAALCO's strong track record.
   -------------------------------------------------------------------

   Nanes Delorme Partners' financial analysis falls well-short of what
    you should expect for your Board. As a self-proclaimed
    "consultant" to E&P companies, Nanes Delorme Partners should know
    that the measure of price-to-EBITDA is made meaningless because of
    factors unique to individual E&P companies such as: emphasis on
    exploration or production, reserve life and oil to gas weighting.
    There are many factors that influence a company's Enterprise Value
    / EBITDA metric. What matters is share performance - and VAALCO's
    record here is strong.

-- Nanes Delorme Partners Distortion: VAALCO's stock has traded
    "higher" since Nanes Delorme Partners began its proxy campaign.
   -------------------------------------------------------------------

   The facts: There are a number of factors that have contributed to
    the Company's positive stock performance in recent months.
    VAALCO's stock price historically surges when the Company moves
    from the property acquisition and seismic phase to the drilling
    phase - and this is precisely where we believe we are now. In
    addition, as the stock price of comparable companies has
    increased, VAALCO's stock price has largely traded in step with
    its peers (and often better).
   -------------------------------------------------------------------

-- Nanes Delorme Partners Distortion: "the Board and VAALCO's current
    management may have rebuffed private inquiries regarding a
    potential acquisition of the Company at a significant premium to
    its current share price on several occasions."
   -------------------------------------------------------------------

   The facts: Maximizing stockholder value has always been a priority
    for VAALCO's Board and a responsibility that we take seriously.
    The Board is open to considering bona fide offers that would
    provide stockholders with full and fair value for their shares,
    but NO such offers have been received. Not surprisingly, Nanes
    Delorme Partners provides no information about the supposed
    inquiries it cites, such as when they were made, who made them and
    how much was offered. VAALCO's Board and management are committed
    to taking all appropriate actions to maximize stockholder value,
    and have not ruled out any action. The Board believes, however,
    that VAALCO's pending drilling program and current market
    conditions clearly indicate that now is NOT the time to initiate a
    process to sell the Company as stockholders are poised to benefit
    from the investments we have made.
   -------------------------------------------------------------------

  THE STAKES ARE HIGH. THE CHOICE IS CLEAR. YOUR VOTE IS IMPORTANT.
VOTE THE WHITE PROXY CARD "FOR" ALL OF YOUR BOARD'S DIRECTOR NOMINEES

Your Board is comprised of accomplished and proven industry leaders, all of whom are committed to serving the interests of all VAALCO stockholders.

Moreover, we believe the objectives of Nanes Delorme Partners and Pilatus Energy are very different from yours. The public record makes clear to us that Nanes Delorme Partners and Pilatus Energy have serious conflicts of interests and that electing their paid nominees could compromise the value of your investment and the future of your company. Rather than serve the interests of all stockholders, we strongly believe that, if elected, Nanes Delorme Partners' paid nominees would advocate only for Nanes Delorme Partners' and Pilatus Energy's self-serving, opportunistic interests, including an immediate sale of VAALCO, just when stockholders are poised to benefit from our imminent drilling program.

Whether or not you plan to attend the Annual Meeting, we strongly urge you to sign, date and return the WHITE proxy card TODAY and discard all gold proxy cards that you receive from Nanes Delorme Partners and Pilatus Energy.

On behalf of VAALCO's Board of Directors, I thank you for your support.

Sincerely,

Robert L. Gerry, III
Chairman and Chief Executive Officer

(1) VAALCO peer group as defined by the independent governance and proxy advisory firm RiskMetrics (ISS)

(2) Based on closing stock prices on May 13, 2008

   IF YOU HAVE ANY QUESTIONS ABOUT HOW TO VOTE YOUR SHARES, PLEASE
     CONTACT THE FIRM ASSISTING US IN THE SOLICITATION OF PROXIES:

                        D.F. KING & CO., INC.
                       Toll-free: 800-901-0068
                        Collect: 212-269-5500

Important Information

In connection with this solicitation of proxies, VAALCO filed with the SEC definitive proxy materials (the "Proxy Materials"). The Proxy Materials contain important information about VAALCO, the 2008 Annual Stockholders Meeting, and our nominees and other directors in the solicitation. VAALCO's stockholders are urged to read the Proxy Materials carefully. Stockholders may obtain additional free copies of the Proxy Materials and other relevant documents filed with the SEC by VAALCO through the website maintained by the SEC at www.sec.gov. The Proxy Materials and other relevant documents may also be obtained free of charge from VAALCO at VAALCO Energy, Inc., 4600 Post Oak Place, Suite 309, Houston, Texas 77027; or by phone at (713) 623-0801. The Proxy Materials are also available on VAALCO's website at www.vaalco.com. The contents of the websites referenced above are not deemed to be incorporated by reference into the Proxy Materials.

Forward-Looking Statements

This document includes "forward-looking statements" as defined by the U.S. securities laws. Forward-looking statements are those concerning VAALCO's plans, expectations, and objectives for future drilling, completion and other operations and activities. All statements included in this document that address activities, events or developments that VAALCO expects, believes or anticipates will or may occur in the future are forward-looking statements. These statements include future production rates, completion and production timetables and costs to complete well. These statements are based on assumptions made by VAALCO based on its experience perception of historical trends, current conditions, expected future developments and other factors it believes are appropriate in the circumstances. Such statements are subject to a number of assumptions, risks and uncertainties, many of which are beyond VAALCO's control. These risks include, but are not limited to, inflation, lack of availability of goods, services and capital, environmental risks, drilling risks, foreign operational risks and regulatory changes. Investors are cautioned that forward-looking statements are not guarantees of future performance and that actual results or developments may differ materially from those projected in the forward-looking statements. These risks are further described in VAALCO's annual report on Form 10-K for the year ended December 31, 2007 and other reports filed with the SEC which can be reviewed at http://www.sec.gov, or which can be received by contacting VAALCO at 4600 Post Oak Place, Suite 309, Houston, Texas 77027, (713) 623-0801.

The Securities and Exchange Commission generally permits oil and gas companies, in filings with the SEC, to disclose only proved reserves that a company has demonstrated by actual production or conclusive formation tests to be economically and legally producible under existing economic and operating conditions. In this letter, we describe volumes of oil that we believe may be discovered in the future through our existing exploration program. These amounts are not proved reserves as defined by the SEC. These estimates are by their nature more speculative than estimates of proved reserves and accordingly are subject to substantially greater risk of being actually realized by VAALCO.

About VAALCO

VAALCO Energy, Inc. is a Houston based independent energy company principally engaged in the acquisition, exploration, development and production of crude oil. VAALCO's strategy is to increase reserves and production through the exploration of oil and natural gas properties with high emphasis on international opportunities. The Company's properties and exploration acreage are located primarily in Gabon and Angola, West Africa.

Source: VAALCO Energy, Inc.