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发明公开
CN103013465A 一种多羟基结构乳化剂及含有该乳化剂的油基钻井液 有权 转让

一种多羟基结构乳化剂及含有该乳化剂的油基钻井液
摘要：
本发明公开了一种多羟基结构乳化剂及含该乳化剂的油基钻井液，所述钻井液包括60～90wt%的基础油和10～40wt%的盐水以及以基础油和盐水的总重量计的0.5～1.2%的乳化剂、0.5～0.8%的润湿反转剂、2.0～3.0%的氧化钙、1.5～2.5%的有机土、2.0～3.0%的降滤失剂以及加重材料，所述加重材料的加入量使得该钻井液的密度为1.1～2.3g/cm3。该乳化剂具有优异的反相乳化性能和润滑性能、能够在60∶40至95∶5大范围油水比和150～220℃温度范围内长期使用，乳化稳定性和高温稳定性高。所述钻井液在高含水油状态下具有良好的电稳定性和体系稳定性，在高密度状态下具有良好的流动性。
摘要（英）：

The invention discloses an oil-base drilling fluid containing a polyhydroxy-structure emulsifier, which comprises 60-90 wt% of base oil and 10-40 wt% of brine, and also comprises 0.5-1.2% of emulsifier, 0.5-0.8% of reverse wetting agent, 2.0-3.0% of calcium oxide, 1.5-2.5% of organic soil, and 2.0-3.0% of fluid loss agent and weighting material on the basis of the total weight of the base oil and brine, wherein the density of the drilling fluid reaches 1.1-2.3g/cm<3> after adding the weighting material. The emulsifier has excellent reversed emulsifying property and lubricating property, can be used for a long time under the conditions of wide oil-water ratio range (60:40-95:5) and wide temperature range (150-220 DEG C), and has high emulsifying stability and high-temperature stability. The drilling fluid has favorable electrical stability and system stability in the high-water-content oil state, and has favorable flowability in the high density state.

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