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                         [LOGO OF NATURAL GAS SYSTEMS]


News Release                                                         May 9, 2006

Natural Gas Systems Announces Agreement to Sell Interest in Delhi Field and
Participate in Enhanced Oil Recovery Project

(Houston, Texas) Natural Gas Systems, Inc. (OTC: NGSY) today announced that it
has entered into a definitive agreement with Denbury Resources, Inc. (NYSE:DNR)
to conduct an enhanced oil recovery project in the Delhi Holt Bryant Unit within
the Delhi Field in northeast Louisiana (the "Delhi Unit"). NGSY will contribute
its working interest in the Delhi Unit and Denbury will contribute all
development capital, technical expertise and required amounts of proven reserves
of carbon dioxide ("CO2") that will be injected into the oil reservoirs. Since
its discovery in 1945, the Delhi Unit has produced approximately 190 million
barrels of oil, which NGS estimates to be less than half of the original oil in
place in the targeted reservoirs.

The principal terms of the agreement call for NGS to receive $50 million at
closing, subject to adjustments, if any, following normal due diligence
inspections. NGS will deliver to Denbury an initial 100% working interest and
80% net revenue interest in the Delhi Unit, while retaining a separate 4.8%
royalty interest within the Delhi Unit and a 25% working interest in other
depths. After the project generates $200 million of net cash flows before
capital expenditures, NGS will regain a 25% working interest (20% net revenue
interest) in the Delhi Unit.

Denbury has estimated that its capital expenditures in the overall project will
likely reach or exceed $200 million and that potential reserves are estimated to
range between 30 and 40 million barrels of oil, net to Denbury's interests. NGS
estimates the potential oil recovery from the project may range from 9 million
to 14 million barrels of oil over the project life, net to NGS's interests and
at no capital cost to NGS.

Robert Herlin, President of NGS, stated "This agreement is a major development
for NGS and its shareholders and demonstrates the value in our business model of
re-developing mature oil and gas fields using modern technology and capital. We
believe that our reversionary and overriding royalty interests will generate
substantial value and net reserves for NGS and its shareholders with minimal or
no capital risk, while allowing redeployment of the cash proceeds to other
attractive projects."


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               Natural Gas Systems, Inc. o Two Memorial City Plaza
                o 820 Gessner, Suite 1340 o Houston, Texas 77024

                       Tel: 713-935-0122 FAX: 713-935-0199

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Natural Gas Systems, Inc. (www.natgas.us) acquires and develops oil and gas
resources and applies conventional and specialized technology to accelerate
production and develop incremental reserves. NGS owns a 100% working interest in
the 13,636 acre Delhi Field in northeastern Louisiana and a 100% working
interest in smaller fields in north central Louisiana. The Company is further
developing two projects in central Texas and certain proprietary technology for
oil field development.

Safe Harbor Statement

All statements contained in this press release regarding potential results and
future plans and objectives of the Company are forward-looking statements that
involve various risks and uncertainties. There can be no assurance that such
statements will prove to be accurate and actual results and future events could
differ materially from those anticipated in such statements. The Company
undertakes no obligation to update or review any forward-looking statement,
whether as a result of new information, future events, or otherwise. Important
factors that could cause actual results to differ materially from our
expectations include, but are not limited to, those factors that are disclosed
under the heading "Risk Factors" and elsewhere in our documents filed from time
to time with the United States Securities and Exchange Commission and other
regulatory authorities. Statements regarding our ability to completed
transactions, successfully apply technology applications in the re-development
of oil and gas fields, future production volumes, success in our drilling and
development activity, prices, future revenues and income and cash flows and
other statements that are not historical facts contain predictions, estimates
and other forward-looking statements. Although the Company believes that its
expectations are based on reasonable assumptions, it can give no assurance that
its goals will be achieved and these statements will prove to be accurate.
Important factors could cause actual results to differ materially from those
included in the forward-looking statements.

For additional information contact:

Investor Contact:    John Liviakis, Liviakis Financial Communications, Inc.
                     (415) 389-4670
NGS Contact:         Sterling McDonald, Chief Financial Officer
                     (713) 935-0122












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               Natural Gas Systems, Inc. o Two Memorial City Plaza
                o 820 Gessner, Suite 1340 o Houston, Texas 77024

                       Tel: 713-935-0122 FAX: 713-935-0199
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