Harmless Disposal Technology of Waste Drilling Fluid in Liaohe Oilfield

To reduce environmental pollution caused by waste drilling fluid, Liaohe Oilfield takes methods of sewage pit seepage control and waste drilling solidification disposal. Firstly, different impermeable material comparation has been taken, as a result, high-density polyethylene geomembrane (HDPE) was choosn as the impermeable material for sewage pit. which has features of good seepage control, good chemical stability, low price, non-toxic and environment friendly. According to features of five different landforms in Liaohe Oilfield, corresponding seepage control programs are developed. impermeable material, implementation and measurement of sewage pit are unified and standardized. which prevent contamination of underground water caused by waste drilling fluid effectively. Finally, curing treatment of the waste drilling fluid is carried out, forming a system engineering to meet the needs of environment protection and costs control.