钻井液与完井液2017，Vol.34Issue(5)：20-26,7.DOI:10.3969/j.issn.1001-5620.2017.05.004
环保型高性能水基钻井液在山前超深井中的应用
Application of Environmentally Friendly High Performance Water Base Muds in Ultra Depp Well Drilling in Piedmont Area
摘要
Abstract
High density water base drilling fluids have been used to drill ultra-deep, high temperature, ultra-high pressure wells penetrating salt formations in the piedmont structure in Kuche County, Xinjiang. Challenges encountered using conventional water base drilling fluids included difficulties in mud property maintenance, tight hole and pipe sticking. An environmentally friendly high performance water base drilling fluid formulated with borehole wall stabilizer, nano filming agent, high performance lubricant and specially designed fast drilling agent was tested in field operations. The high performance drilling fluid had high inhibitive capacity and good rheology and lubricity, and was environmentally friendly. It also helped protect reservoirs from being damaged. The application of this drilling fluid in a well drilled in the piedmont structure in Kuche has proved its performance as said above. Rate of penetration (ROP) of the well was 6.6％ faster than the ROP of an offset well drilled with oil base drilling fluid. No drilling accidents have ever occurred, and occurrence of downhole complications was greatly reduced. This high performance low bio-toxicity water base drilling fluid has passed environment protection inspection. Drill cuttings produced were in their original colors, and were not colored by the drilling fluid. This environmentally friendly high performance drilling fluid has provided a means of drilling complex formations in environmentally sensitive area.关键词
环境保护/高性能水基钻井液/超深井/盐膏层Key words
Environment protection/High performance water base drilling fluids/Ultra-deep well/Formation with salt and gypsum分类
能源科技引用本文复制引用
李家学,张绍俊,李磊,孙东山,张超,王涛..环保型高性能水基钻井液在山前超深井中的应用[J].钻井液与完井液,2017,34(5):20-26,7.基金项目
国家重大专项"前陆冲断带超深井安全快速钻井技术(2016ZX05051002)"部分研究成果. （2016ZX05051002）
