By introducing the fluid loss reducer XNPCL-1 and the nano-micron plugging agent of scientific research products,and selecting the material of the high-temperature drilling fluid system,the formula of the high-density high-temperature resistant drilling fluid system was obtained as follows:3%base slurry +5%potassium chloride +0.3%potassium polyacrylamide+0.6%polyamine inhibitor +3%fluid loss reducer XNPCL-1 +3%natural polymer complex JNJS220+3%wall stabilizer HQ-10+3%nanomicron blocking agent +3%superfine calcium carbonate +5%RH220+0.5%wear reducer(increased to 2.1 g·cm-3).The indoor evaluation results showed that the high-density anti-high-temperature drilling fluid system had good comprehensive performance and has been successfully applied in the ultra-deep well Rentan1,overcoming the technical problems such as high temperature in the narrow hole section of the well,instability of the well wall,salt water pollution and acid gas pollution.
关键词
超深井/高密度/抗高温/研究/应用
Key words
Ultra deep well/High density/Resistance to high temperature/Research/Application
维普
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