Chevron Corporation operates in the Petroleum refining sector. Chevron Corporation (Chevron) manages its investments in subsidiaries and affiliates and provides administrative, financial, management and technology support to the United States and international subsidiaries that engage in petroleum operations, chemicals operations, mining operations, power generation and energy services. Upstream operations consist of exploring for, developing and producing crude oil and natural gas; transporting crude oil by international oil export pipelines; transporting, storage and marketing of natural gas, and a gas-to-liquids project. Downstream operations consist of refining of crude oil into petroleum products marketing of crude oil and refined products. In September 2010, the Company completed acquisition of operating interests in three deepwater exploration blocks in the South China Sea's Pearl River Mouth Basin. In February 2011, Chevron completed the acquisition of Atlas Energy, Inc. In our complete report available for purchase the company is compared to: Conocophillips, Exxon Mobil Corporation and Total SA.