Press releases.

OKLAHOMA CITY, Oct 2010 (BUSINESS WIRE) -- Chesapeake Energy Corporation ("Chesapeake", NYSE: CHK) and CNOOC Limited (NYSE: CEO; SEHK:00883) announced the execution of an agreement whereby CNOOC International Limited, a wholly-owned subsidiary of CNOOC Limited, will purchase a 33.3% undivided interest in Chesapeake's 600,000 net oil and natural gas leasehold acres in the Eagle Ford Shale project in South Texas. The consideration for the sale will be $1.08 billion in cash at closing, subject to adjustment. In addition, CNOOC Limited has agreed to fund 75% of Chesapeake's share of drilling and completion costs until an additional $1.08 billion has been paid, which Chesapeake expects to occur by year-end 2012. Closing of the transaction is anticipated in the 2010 fourth quarter.??

As operator of the project, Chesapeake will conduct all leasing, drilling, completion, operations and marketing activities for the project. Over the next several decades, the companies plan to develop net unrisked unproved resource potential up to 4 billion barrels of oil equivalent (after deducting an assumed average royalty burden of 25%). Chesapeake is currently utilizing 10 operated rigs to develop its Eagle Ford leasehold and with the additional capital from CNOOC Limited, anticipates increasing its drilling activity to approximately 12 operated rigs by year-end 2010, approximately 31 rigs by year-end 2011 and approximately 40 rigs by year-end 2012. Approximately 900 wells are expected to be drilled by year-end 2012. Currently Chesapeake has 10 horizontal Eagle Ford wells in production with initial production rates of up to 1,160 barrels of oil and 0.4 mmcf of natural gas per day in the oil window and 4.0 mmcf of natural gas and 1,200 barrels of oil per day in the wet gas window. Chesapeake anticipates the project will reach its peak production of 400,000-500,000 barrels of oil equivalent per day in the next decade.??

The assets are located principally in the counties of Webb, Dimmit, LaSalle, Zavala, Frio and McMullen, and are located primarily in the oil window (~85%) and the wet gas window (~15%) of the Eagle Ford Shale and in the dry gas window of the Pearsall Shale. CNOOC Limited will have the option to acquire its 33.3% share of any additional acreage acquired by Chesapeake in the area and also the option to participate with Chesapeake for a 33.3% interest in midstream infrastructure related to production established from the assets.??

Aubrey K. McClendon, Chesapeake's Chief Executive Officer, commented, "We are very pleased to announce our fifth industry shale development transaction and for it to include CNOOC Limited, China's largest producer of offshore oil and natural gas and one of the largest independent oil and gas companies in the world. This transaction will provide the capital necessary to accelerate drilling of this large domestic oil and natural gas resource, resulting in a reduction of our country's oil imports over time, the creation of thousands of high-paying jobs in the U.S. and in the payment of very significant local, state and federal taxes. In addition, Chesapeake's embedded safety culture and integrated environmental protection strategies will be adopted to safeguard personnel and the surface and subsurface environment. Moreover, this project will advance the efforts of both the U.S. and China to reduce greenhouse gas emissions and accelerate commercial opportunities for the development of shale gas resources in China, furthering the objectives of the U.S. - China Shale Gas Resource Initiative announced by the White House on November 17, 2009.??

"When completed, this transaction will successfully accomplish another component of Chesapeake's strategic and financial plan outlined in May 2010 designed to increase shareholder value. This brings the combined proceeds from our shale development ventures, including upfront cash payments and drilling carries, since 2008 to approximately $13 billion. Chesapeake has continued to maintain a majority position in each of the five major projects subject to development arrangements ranging from 67% to 80%. The implied pre-development value of Chesapeake's retained interest in those shale ventures is approximately $37 billion based on the valuations in the sale transactions."??

Fu Chengyu, Chairman of CNOOC Limited, stated, "As one of the world's largest independent oil and gas companies, CNOOC Limited is keeping a close watch on the development of the upstream sector across the world, among which is shale oil and natural gas development. CNOOC Limited has the desire and ability to establish itself in this field in a suitable scale by cooperating with a leading company such as Chesapeake, which we believe will benefit both parties reflecting our win-win philosophy. Partnering with Chesapeake on this project to develop shale oil and natural gas jointly not only satisfies the spirit of Sino-U.S. cooperation in the energy sector, but also underscores CNOOC Limited's responsible approach to climate change issues and its social responsibilities."??

Yang Hua, Vice Chairman and Chief Executive Officer of CNOOC Limited, said, "The cooperation with Chesapeake in shale oil and natural gas is consistent with our value-driven overseas development strategy. The execution of this project will benefit CNOOC Limited's long term production and reserves growth and should produce considerable returns for our shareholders. Chesapeake, as the world's leading company in the shale oil and natural gas field, has accumulated abundant experience on drilling and completion in various U.S. shale plays with world-class partners. We are therefore very confident about this project's potential success."??

Chesapeake's advisor on the transaction was Jefferies & Company, Inc., and CNOOC Limited's advisor was Tudor, Pickering, Holt & Co. Securities, Inc.