Chaparral energy, an Oklahoma City Based shale oil and gas producer, filed for bankruptcy protection on Sunday, becoming another energy company that has collapsed in recent months as oil prices plummeted due to the outbreak. < / P > < p > this is the second time that the company has filed for bankruptcy protection in four years, the last time in 2016, after the oil price slump started in 2014, and walked out of bankruptcy in March 2017. Founded in 1988, chaparal energy is an independent oil and gas company engaged in shale oil and gas production, production and acquisition in Anadarko basin. < / P > < p > according to the company’s filings with the Delaware bankruptcy court, its assets and liabilities are between $500 million and $1 billion. At the end of 2019, the company’s outstanding debt was about $421 million. < / P > < p > the new coronavirus pandemic has led to a surge in energy sector bankruptcies, as the epidemic blockade stifled demand and prompted lending institutions to cut credit lines. So far this year, major shale oil companies, including Chesapeake energy, whiting petroleum and California resources, have declared bankruptcy.