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发明公开
CN105295872A 一种适用于致密砂岩储层的钻井液 有权

一种适用于致密砂岩储层的钻井液
摘要：
本发明提供了一种适用于致密砂岩储层的钻井液。以质量百分比计，该钻井液的组成包括：0.5％-2％的膨润土，0.5％-2.5％的包被抑制剂，0.5％-1％的流型调节剂，3％-4％的降滤失剂，0.4％-0.8％的防水锁剂，4％-10％的暂堵剂，40％-50％的生物聚醇盐，0％-50％的加重剂，余量为水，该钻井液的密度为1.16g/cm3-1.55g/cm3。本发明提供的适用于致密砂岩储层的钻井液可以有效防止致密砂岩储层的污染，并确保井下作业安全。
摘要（英）：

The invention provides a drilling fluid suitable for a compact sandstone reservoir. The drilling fluid comprises the following components by mass percent: 0.5-2 percent of bentonite, 0.5-2.5 percent of a encapsulating/inhibiting agent, 0.5-1 percent of a flow pattern regulator, 3-4 percent of a fluid loss additive, 0.4-0.8 percent of an anti-water-blocking agent, 4-10 percent of a temporary plugging agent, 40-50 percent of LRID, 0-50 percent of a weighting agent and the balance of water. The drilling fluid has the density of 1.16 g/cm<3>-1.55 g/cm<3>. The drilling fluid suitable for the compact sandstone reservoir can effectively prevent the compact sandstone reservoir from pollution and ensure safe downhole operation.

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