涪陵页岩气水平井油基钻井液技术

Oil-based Drilling Fluids Used for Fuling Horizontal Shale Gas Well

摘要:

针对非常规油气藏开发及复杂地层安全钻井的需要，为解决水平井井壁稳定、摩阻、携岩及地层污染问题，开展了油基钻井液技术研究与应用。通过乳化剂、有机土、降滤失剂、封堵剂等处理剂的研选，形成以柴油、白油为基础油的油基钻井液配方、循环损耗量控制技术及现场施工工艺。在涪陵页岩气田应用了100余口井，满足了现场施工需要，取得良好的技术经济效果。结合涪陵区块的具体情况，不断深入研究，2015年研究并现场试验了粉状乳化剂、无土相油基钻井液等新技术。

Abstract:

In view of the development of unconventional oil and gas reservoirs and safety drilling in complex formations, the research and application of oil-based drilling fluids are carried out to solve wall stability of horizontal well, friction, cuttings carrying and formation pollution. Oil-based drilling fluid formula with diesel and white oil as base oil, circulation loss control technique and on-site operation process were formed by the study and selection of emulsifier, organic bentonite, filtrate reducer, plugging agent and some other treatment agents, which met the construction requirements in the application in more than 100 wells in Fuling with favorable technical and economic effects. Combined with the specific conditions of Fuling block, intensive study was continued, field tests of powder emulsifier and non-bentonite oil-based drilling fluid were made in 2015.