E pisode I Tarim Oilfield Drilling Waste Treatment Current Situation Drilling cuttings is the main waste produced during drilling operation, including clay, heavy material, chemical treating agent, waste water, sump oil and drilling cuttings, and the kinds of polymer, heavy metal ion, salt, pitch and other modifying substance is harmful to environment. During drilling , each well generally produces about 800m³ drilling waste fluid, the drilling cuttings has no recovery value, only be piled up at wellsite mud pit, and the environment pollution is caused by hidden dangers. During recent years, Tarim oilfield oil and gas resources developed rapidly. And with the drilling wells quantity continuous increasing, the cumulative drilling waste has been placing a growing hazard to environment pollution. According to statistical data, in year 2009, the Tarim oilfield drilling waste reached to 130,000m³, including drilling cuttings about 50,000. While in year 2010, the drilling wast