BP is one of the largest producers of natural gas in the US Lower 48. Through a series of mergers with Amoco ARCO and Vastar Resources the company has built a vast portfolio of upstream and downstream operations. BP operates in the Mid Continent Rocky Mountains and Gulf Coast regions. BP has historically produced from mature low risk assets in the Mid Continent. In mid 2008 the company acquired positions in two unconventional shale plays the Fayetteville and Arkoma Woodford from Chesapeake. These acquisitions introduced much needed long term growth opportunities in BP's portfolio of mature fields. However because its Mid Continent production is overwhelmingly gas the company has scaled back investment since the downturn in gas prices. In the near term BP's focus in the Mid Continent is on the Cleveland tight sand in the Anadarko Basin and Woodford shale in the Arkoma Basin.