April 29 (Reuters) - Chesapeake Energy Corp, which exited bankruptcy in February, is working with two banks on a potential sale of its oil-producing South Texas assets that could fetch as much as $2 billion, two sources familiar with the plan said. The launch of a formal sale process by the U.S. natural gas producer, however, could be delayed as it works through the exit of its Chief Executive Officer Doug Lawler, the sources said, declining to be identified as the plan is confidential. Chesapeake, which is the second largest U.S. shale gas producer according to energy analytics firm Enverus, declined to comment on the sale consideration. The assets, spread over 220,000 acres in the Eagle Ford shale basin, produced 84,000 barrels of oil equivalent per day in the fourth quarter and only 26% of that was natural gas. Offloading the South Texas acreage would mean shifting focus back to natural gas, a strategic reversal outlined by Lawler in an interview in February with Reuters. Lawler, who will leave at the end of April, took over eight years ago from billionaire founder Aubrey McClendon amid an antitrust probe in 2013 and had unsuccessfully tried to pivot Chesapeake’s focus away from natural gas to oil. The Oklahoma City-based company was saddled with more than $9 billion debt and filed for bankruptcy last year amid the pandemic-driven oil price collapse. The company set aside just 8% of its 2021 budget for South Texas, while 85% of the total $650 million was earmarked for gas-rich plays in the Appalachian basin in Pennsylvania, West Virginia and Ohio as well as the Gulf Coast. Almost two-thirds of its fourth-quarter production of around 435,000 boepd was natural gas. (Reporting by Shariq Khan in Bengaluru, Additional reporting by David French in New York; Editing by Arun Koyyur)