High-performance composite salt water drilling fluid for potassium salt drilling

The invention provides a high-performance composite salt water drilling fluid for potassium salt drilling. The high-performance composite salt water drilling fluid is prepared from the following components in parts by weight: 100 parts of water, 30-50 parts of magnesium chloride, 10-30 parts of calcium chloride, 0.5-2 parts of an environment-friendly filtrate reducer, 0.3-1 part of an environment-friendly tackifier, 0.5-1.5 parts of magnesium oxide, 0.5-2 parts of a lubricant and 0.5-1 part of a surfactant. The high-performance composite salt water drilling fluid has excellent inhibition performance, lubricating performance, rock powder carrying performance, filtrate loss reduction performance and rheological stability, and is suitable for being used in the field of sylvite geological drilling engineering such as deep-hole sylvite strata and carnallite strata. 本发明提供了一种钾盐钻探高性能复合盐水钻井液，由如下重量份数的组分组成：水100份，氯化镁30～50份，氯化钙10～30份，环保降滤失剂0.5～2份，环保增黏剂0.3～1份，氧化镁0.5～1.5份，润滑剂0.5～2份，表面活性剂0.5～1份。本发明的高性能复合盐水钻井液具有优良的抑制性能、润滑性能、岩