Release Details

                 Natural Gas Services Ranks #67 on 2006 List

MIDLAND, Texas, Oct. 23 /PRNewswire-FirstCall/ -- Natural Gas Services Group, Inc. (Amex: NGS), a leading provider of equipment and services to the natural gas industry, announces it has been recognized by Forbes magazine as one of "The 200 Best Small Companies" for the second year in a row. The 200 Best Small Companies list is selected following a comprehensive evaluation of financial results plus additional operating factors of candidate companies having sales between $5 million and $750 million. Additional qualification criteria included a consistent pattern of positive growth during a five-year period as well as over the last twelve months and net profit margins greater than 5%.

Steve Taylor, President and CEO of NGS said, "We are gratified that, for the second year in a row Forbes has recognized NGS's achievements and placed us on their prestigious Top 200 small company list. This is a tribute to the Company's customer focus, business strategy and financial execution. Our employees deserve the credit that goes with being named to this list again."

To be included in the Forbes list, a company must be a solid, consistent performer with a strong record over the past 12 month and five-year periods, and positioned for further growth. The Forbes' editors said, "Our list of the 200 Best Small Companies in America ferrets out the most robust, fundamentally disciplined public outfits with sales between $5 million and $750 million. These winners have come through a tough year, contending with suddenly high- energy costs and a string, only recently broken, of 17 interest-rate hikes by the Fed. Not surprisingly, most of these 200 scrappy players carry low debt burdens."

To learn more about the 200 Best Small Companies, visit www.forbes.com/lists/2006/23/biz_06200best_The-200-Best-Small- Companies_land.html or see the print edition of Forbes dated Oct. 30, 2006.

About Natural Gas Services Group, Inc.

NGS is a leading provider of small to medium horsepower compression equipment to the natural gas industry with a primary focus on the non- conventional gas industry, i.e., coaled methane, gas shale's and tight gas. The Company manufactures, fabricates and rents natural gas compressors that enhance the production of natural gas wells and provides maintenance services for those compressors. In addition, the Company sells custom fabricated natural gas compressors to meet customer specifications dictated by well pressures, production characteristics and particular applications. The Company also manufactures and sells flare systems for gas plant and production facilities. NGS is headquartered in Midland, Texas with manufacturing facilities located in Tulsa, Oklahoma, Lewiston, Michigan and Midland, Texas and service facilities located in major gas producing basins in the U.S.

This release contains forward-looking statements subject to various risks and uncertainties that could cause the Company's future plans, objectives and performance to differ materially from those in the forward-looking statements. Forward-looking statements can be identified by the use of forward-looking terminology such as "may," "will," "expect," "intend," "plan," "subject to," "anticipate," "estimate," "continue," "present value," "future," "reserves", "appears," "prospective," or other variations thereof or comparable terminology. Factors that could cause or contribute to such differences could include, but are not limited to, those relating to conditions in the natural gas industry, including the demand for natural gas and fluctuations in the price of natural gas; weaknesses in the Company's internal controls; competition among the various providers of compression services and products; changes in safety, health and environmental regulations; changes in economic or political conditions in the markets in which we operate; failure of our customers to continue to rent equipment after expiration of the primary rental term; the inherent risks associated with our operations, such as equipment defects, malfunctions and natural disasters; our inability to comply with covenants in our debt agreements and the decreased financial flexibility associated with our substantial debt; future capital requirements and availability of financing; general economic conditions; events similar to September 11, 2001; and fluctuations in interest rates. While we believe our forward-looking statements are based upon reasonable assumptions, these are factors that are difficult to predict and that are influenced by economic and other conditions beyond our control. Important factors that could cause actual results to differ materially from the expectations reflected in the forward-looking statements include, but are not limited to, the factors described above and the other factors described under the caption "Risk Factors" in the Company's Annual Report on Form 10-K filed with the Securities and Exchange Commission.

For More Information, Contact:

Jim Drewitz, Investor Relations

972-355-6070

SOURCE  Natural Gas Services Group, Inc.
    -0-                             10/23/2006
    /CONTACT:  Jim Drewitz, Investor Relations, +1-972-355-6070, for Natural
Gas Services Group, Inc./
    (NGS)

CO:  Natural Gas Services Group, Inc.
ST:  Texas
IN:  OIL PUB MAG
SU:  AWD

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5309 10/23/2006 09:25 EDT http://www.prnewswire.com