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發(fā)布時(shí)間：2020-06-29 16:17:22 查看次數(shù)：3091次
Drilling fluid research and development focuses on the performance improvement of high temperature resistance, strong suppression, strong plugging, environmental protection and leak prevention.
Drilling fluid research and development focuses on the performance improvement of high temperature resistance, strong suppression, strong plugging, environmental protection and leak prevention. At present, the use temperature of water-based drilling fluid is 243℃ and the high density is 2.87g/cm3; the use temperature and density of oil-based drilling fluid are 265℃ and 2.39g/cm3, respectively. The high temperature and high pressure oil base developed by Schlumberger The drilling fluid has a density of 2.39g/cm3 and stable performance at 260℃. The high-temperature high-density water-based drilling fluid has a temperature resistance of 232℃ and a density of 2.3g/cm3. The newly developed shale gas and water-based drilling fluids of companies such as Halliburton and Baker Hughes can prevent pore pressure transmission and plug micro-fractures. They have strong suppression, high lubrication, friction reduction, low fluid loss, prevention of mud packs and the environment Friendly and other characteristics, widely used in shale gas drilling. The nanoparticle shale inhibitor developed by the University of Texas can reduce the problem of shale shaft wall instability, and provides safety guarantee for drilling through shale formations with water-based drilling fluids. The thermally active resin plugging materials developed by Wellcem of Norway and Saudi Aramco can be rapidly cured at the formation temperature, with a consolidation temperature of 20 to 150°C and a density of 0.75 to 2.5g/cm3, which can be used for safe drilling in narrow density windows. The fluorine-based high-temperature resistant drilling fluid developed by Halliburton is formulated with perfluoropolyether, fluorine emulsifier and calcium chloride brine. It has the characteristics of high thermal stability and strong oxidation resistance. The temperature resistance is above 343℃ . The high-temperature and high-density water-based drilling fluid developed by CNPC has a temperature resistance of 232°C and a density of 2.3g/cm3. The high-density drilling fluid developed by Sinopec Engineering Institute has a high density of 2.87g/cm3.
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