摘要：Drilling fluid technology is an important part of the oil and gas drilling engineering,but waste drilling fluids have become one of the major pollution sources of the drilling engineering, especially in environmentally sensitive and ecologically fragile areas.In order to meet the demand of environmental friendly water-based drilling fluids in the Shengli Oilfield,a series of environmental friendly agents,such as filtration reducer (HB-1),shale inhibitor (HB-2) and lubricant (HB-3),were synthesized or optimized. The environmental friendly water-based drilling fluids (SLHB) were finally established based on the optimization or development of the environmental friendly agents,and the results indicated that it exhibited excellent rheological and filtration behaviors with HTHP filtration lower to 10.2 mL, and it also had good hydration inhibitive and pollution-resistance properties with environmental friendly performance of EC50 above 105 mg/L and BOD5/CODCr equal to 16.2%,which could meet the national secondary standard for wastewater discharge.Furthermore,environmental friendly water-based drilling fluids (SLHB) has been successfully applied in over 10 wells drilling operation of the Shengli Oilfield,which could meet the environmental friendly water-based drilling fluids requirement and explored a new path of green production in the Shengli Oilfield.
