Mariner Energy 8-K Results of Operations and Financial Condition

Exhibit 99.1

Production Update

Mariner Energy’s estimated monthly net production by operating region is listed below. “Deepwater” and “Shelf” refer to company fields in the Gulf of Mexico. Generally, deepwater means water depths greater than 1,300 feet, and shelf means depths less than 1,300 feet.

Mariner plans to post production data to this website on a monthly basis on the last business day of the month following the applicable reporting period.

Information concerning estimated net production is qualified by the “Forward-Looking Statements” provisos located on this website under the “Site Terms / Disclaimers” tab.

Estimated Net Production

	January		February		March		April		May		June		Year-to-Date
Natural Gas (Boe)
Permian Basin		76,877		63,064		63,341		77,845		94,061		89,792		464,980
Gulf Coast & Other		78,256		75,534		78,680		80,861		78,823		69,529		461,683
GOM Deepwater		574,036		560,913		522,019		417,871		374,743		366,513		2,816,095
GOM Shelf		453,507		426,744		481,119		483,005		429,249		383,453		2,657,077
Total		1,182,676		1,126,255		1,145,159		1,059,582		976,876		909,287		6,399,835
Oil (Bbls)
Permian Basin		136,430		133,034		131,977		143,289		161,044		170,959		876,733
Gulf Coast & Other		9,977		18,076		12,164		10,971		10,820		11,628		73,636
GOM Deepwater		97,230		116,959		116,421		85,311		89,303		79,932		585,156
GOM Shelf		166,795		170,375		213,193		197,639		182,099		161,404		1,091,505
Total		410,432		438,444		473,755		437,210		443,266		423,923		2,627,030
Natural Gas Liquids (Bbls)
Permian Basin		73,155		68,189		73,623		76,477		82,779		91,826		466,049
Gulf Coast & Other		24,212		21,721		15,188		20,159		22,207		33,659		137,146
GOM Deepwater		44,388		38,906		37,909		37,447		28,547		6,844		194,041
GOM Shelf		49,064		70,129		58,748		34,336		43,128		35,963		291,368
Total		190,819		198,945		185,468		168,419		176,661		168,292		1,088,604
Total Production (Boe)		1,783,927		1,763,644		1,804,382		1,665,211		1,596,803		1,501,502		10,115,469
Avg Daily Production (Boe/d)		57,546		62,987		58,206		55,507		51,510		50,050		55,887
Total Production (Mcfe)		10,703,562		10,581,864		10,826,292		9,991,266		9,580,818		9,009,012		60,692,814
Avg Daily Production (Mcfe/d)		345,276		377,924		349,235		333,042		309,059		300,300		335,319

Site Terms / Disclaimers

IMPORTANT INFORMATION CONCERNING FORWARD-LOOKING STATEMENTS

This website includes forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. All statements, other than statements of historical facts, that address activities that Mariner assumes, plans, expects, believes, projects, estimates or anticipates (and other similar expressions) will, should or may occur in the future are forward-looking statements. Our forward-looking statements generally are accompanied by words such as “may”, “will”, “estimate”, “project”, “predict”, “believe”, “expect”, “anticipate”, “potential”, “plan”, “goal”, or other words that convey the uncertainty of future events or outcomes. Forward-looking statements provided in this website are based on Mariner’s current belief based on currently available information as to the outcome and timing of future events and assumptions that Mariner believes are reasonable. Mariner does not undertake to update its guidance, estimates or other forward-looking statements as conditions change or as additional information becomes available. Estimated reserves are related to hydrocarbon prices. Hydrocarbon prices used in estimating reserves may vary significantly from actual future prices. Therefore, volumes of reserves actually recovered may differ significantly from such estimates. Mariner cautions that its forward-looking statements are subject to all of the risks and uncertainties normally incident to the exploration for and development, production and sale of oil and natural gas. These risks include, but are not limited to, price volatility or inflation, environmental risks, drilling and other operating risks, regulatory changes, the uncertainty inherent in estimating future oil and gas production or reserves, and other risks described in Mariner’s latest Annual Report on Form 10-K and other documents filed by Mariner with the Securities and Exchange Commission (SEC). Any of these factors could cause Mariner’s actual results and plans of Mariner to differ materially from those in the forward-looking statements. Investors are urged to read Mariner’s latest Annual Report on Form 10-K and other documents filed by Mariner with the SEC.

“Proved” oil and gas reserves are those that can be estimated with reasonable certainty to be economically and legally producible under existing economic conditions, operating methods and government regulations. “Probable,” “possible” and “non-proved” reserves, reserve “potential” or “upside” or other descriptions of volumes of reserves potentially recoverable involve estimates that by their nature are more speculative than estimates of proved reserves and accordingly are subject to substantially greater risk of actually being realized

by Mariner. The SEC generally does not permit a company’s filings with the SEC to include estimates of oil or gas resources other than reserves, and any estimated values of such resources, due to concern that resources other than reserves are too speculative and may be misleading.

This website does not constitute an offer to sell or a solicitation of an offer to buy any securities of Mariner.

Statement last reviewed:February 1, 2010