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发明公开
CN105255460A 一种适合于页岩气开发的水基钻井液 无效 - 驳回

一种适合于页岩气开发的水基钻井液
摘要：
本发明提出了一种适合于页岩气开发的水基钻井液，在水的基础上按体积百分比组成为：100％的水；2-6％的润滑剂；1-5％的抑制剂；1-5％的封堵防塌剂；1-5％的页岩封堵剂；1-5％的纳米封堵剂；1-3％的降滤失剂；1-3％的添加剂；0-0.4％的提切剂；0.1-0.6％的pH调节剂；0-300％的加重剂。本发明具有极低的滤失量，能够有效的封堵页岩裂缝，提高井壁稳定性能；并且润滑性能良好，极好的解决页岩气水平井所带来的摩阻与扭矩的问题；并且具有优异的流变性能。
摘要（英）：

The invention provides a water-based drilling fluid suitable for shale gas development. The water-based drilling fluid is prepared from the following raw materials in volume on the basis of water: 100 percent of water, 2 to 6 percent of lubricating agents, 1 to 5 percent of inhibitors, 1 to 5 percent of blocking anti-collapse agents, 1 to 5 percent of shale blocking agents, 1 to 5 percent of nanometer blocking agents, 1 to 3 percent of fluid loss additives, 1 to 3 percent of additives, 0 to 0.4 percent of shearing potentiator, 0.1 to 0.6 percent of pH regulator and 0 to 300 percent of weighting agents. The water-based drilling fluid has low filter loss, shale cracks can be effectively blocked, and the stability of a well wall is increased; the lubricating performance is good, and the problems of friction and torque caused by a shale gas horizontal well are preferably solved; the rheological property is excellent.

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