煤矿安全2018，Vol.49Issue(1)：13-16,4.DOI:10.13347/j.cnki.mkaq.2018.01.004
束缚水钻井液及其在煤层气水平井中的应用
Application of Bound Water Drilling Fluid in CBM Horizontal Well
摘要
Abstract
In order to reduce the adverse effects of free water in the drilling fluid on the well wall stability and reservoir protection of CBM horizontal wells,the bound water drilling fluid,its formula was clear water +0.1％ soda +0.5％ to 0.8％ bound water gelling agent + 0.5％ to 1.0％ water-based lubricant,was developed on the basis of evaluating the ability of the drilling fluid treatment agent to bind the free water.The performance evaluation results of CBM-bound water drilling fluid show that the free water content is low,the plugging ability is strong,the loss of the invasion coal rock is small,and the effect on the coal rock strength is little.The ability of stabilizing well wall and protecting coal reservoir of the bound water drilling fluid are better than xanthan drilling fluid which is used at present.The field application results show that the bound water drilling fluid can solve the contradiction between reservoir protection and wellbore stability of CBM horizontal well at present.关键词
自由水/束缚水/井壁稳定/储层保护/煤层气水平井/钻井液Key words
free water/bound water/well wall stability/reservoir protection/CBM horizontal well/drilling fluid分类
天文与地球科学引用本文复制引用
代凯,胡伟,张建国,周立春,王刚,岳前升..束缚水钻井液及其在煤层气水平井中的应用[J].煤矿安全,2018,49(1):13-16,4.基金项目
国家自然科学基金资助项目(51574040) （51574040）
国家科技重大专项资助项目(2016ZX05022-004) （2016ZX05022-004）
