Current Situation of drillling waste management in Domestic

Oilfield drilling waste is one of the main pollution sources of oil and gas industry, and the waste disposal is a major problem in oilfield. Sludge Waste drilling fluid treatment is recorded into national hazardous waste list, and as the law and regulations of the country is increasingly reasonable, the local government has greatly promoted environmental requirements and field of awareness of environmental protection. The development of drilling fluid processing methods tends to be more imperative.

Drilling mud waste management technology at home and abroad at present, mainly include simple processing emissions, safe injection formation or well annular space, long-distance centralized processing, backfill, pit sealing, land farming, curing, a solid liquid separation, burning, microbial treatment, etc. However, these methods are basically a problem, economic and environmental benefits can't be both satisfactory on treatment effect and the processing cost. If it contracts low cost, then environmental requirements cannot meet the requirements.

Other solutions such as reinjection formation and soil cultivation play effective role in environmental benefits, but its application range is too small and limitations have been the main cause to make it be popularized. At the same time, the above mentioned methods for the mud system have certain requirements, and it does not apply to all of the abandoned after drilling mud waste management. Solidification method is widely used at present, but compared with other traditional methods on the balance of cost and effect, which is an important factor for the broad applicability of various waste muds. The method covers an area of large, high processing cost. Nevertheless, the environmental risk is still very big for drilling waste mud is one of the main sources of oil and gas industry, and the waste disposal is a big problem in oilfield.

Drilling waste zero discharge method has been the most effective and popular method in oil field drilling waste dispose treatment and processing at present. And it will be the leading method in the future.