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发明公开
CN106433581A 一种无土相抗高温储层钻井液及其制备方法 有权

一种无土相抗高温储层钻井液及其制备方法
摘要：
一种无土相抗高温储层钻井液及其制备方法。所述储层钻井液包括100重量份的淡水、150至220重量份的甲酸钾、0.2至0.25重量份的pH调节剂、2至3重量份的抗高温降滤失剂、0.4至0.8重量份的抗高温提切剂、5至8重量份的碳酸钙、0至200重量份的锰矿粉；所述方法包括：将所述重量份的甲酸钾溶解在淡水中，加入所述重量份的pH调节剂、抗高温降滤失剂、抗高温提切剂、碳酸钙和锰矿粉，搅拌。本申请的储层钻井液能够满足较高的密度需求，具有良好的稳定性，在高温(例如，150-160℃的)下使用时仍能保持稳定的性能，并且具有良好的储层保护性能、沉降稳定性和大斜度井携岩的携带能力，能够满足水平井钻进需要。
摘要（英）：

The invention relates to clay-free high temperature resistance reservoir drilling fluid and a preparation method of the fluid. The reservoir drilling fluid comprises 100 parts by weight of fresh water, 150-220 parts by weight of potassium formate, 0.2-0.25 parts by weight of pH (potential of hydrogen) regulator, 2-3 parts by weight of high temperature resistance fluid loss agent, 0.4-0.8 parts by weight of high temperature resistance shear strength improving agent, 5-8 parts by weight of calcium carbonate, and 0-200 parts by weight of manganese ore powder. The method comprises the steps of dissolving the parts by weight of potassium formate in the fresh water, and adding the parts by weight of pH regulator, high temperature resistance fluid loss agent, high temperature resistance shear strength improving agent, calcium carbonate and manganese ore powder for agitation. The reservoir drilling fluid can meet higher density requirements, has good stability, can keep stable when used at high temperature (such as 150-160 DEG C), has good reservoir protection performance, sedimentation stability and highly-deviated well cutting carrying capacity and can meet drilling requirements of a horizontal well.

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