页岩水平井用高性能油基钻井液研究与应用

Research and Application of High Performance Oil Base Drilling Fluid for Shale Horizontal Wells

国内页岩油气水平井用油基钻井液(OBM)存在切力低、流变性能差等问题,难以完全满足页岩油气长水平井钻井施工井壁稳定与井眼清洁的技术要求。针对上述问题,在借鉴国外先进技术的基础上,开展了页岩油气水平井用OBM体系构建,在研发核心处理剂的基础上,形成了一套高性能油基钻井液体系,对其综合性能进行了系统研究,该钻井液体系整体性能指标达到国外同类钻井液体系水平。该油基钻井液在彭页2HF井水平段钻进中进行了成功应用,并创造了国内陆上页岩气水平井水平段和水平位移最长的新纪录。高性能油基钻井液技术的成功研究与应用,提高了我国高性能油基钻井液技术的自主化水平。

Starting late, study on high performance oil base drilling fluid in China lags way behind that in overseas countries. Domestic oil base drilling fluid,with shortcomings like low yield value and poor rheo- logic property, can not fully meet the requirements of wellbore stabilization and hole cleaning in the drilling of shale horizontal wells. In view of the above-mentioned questions, by learning from advanced oversea technology,high performance oil base drilling fluid（HPOBM） for shale horizontal wells was designed. Then,a new HPOBM formula was studied after some key materials were developed,and its comprehensive performance was evaluated systematically. The test result showed that the technological parameters of this formula could compare with those of the similar oversea HPOBM. The new oil base drilling fluid formula was used successfully in shale gas horizontal well of Pengye 2HF, and this well set a new record of the lon- gest horizontal well section and horizontal displacement in China. So, the development and application of this technology is of great significance in bringing the manufacture of domestic HPOBM to a higher level.