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高压地层测试作业时 ,采用经过调整的原钻井液作为压井液 ,容易因压井液沉淀而造成管串卡井事故 ,而采用无固相压井液 (尤其是溴盐溶液 )成本又很高 ,为此 ,渤海油田在QHD30 1N 1等高压井测试期间 ,用盐水或海水作井液 ,测试结束后再使用原钻井液压井 ,成功地进行了负压测试 ,既保证了作业安全 ,又降低了成本。
High-pressure strata test operation, the use of the adjusted original drilling fluid as killing fluid, easy killing due to killing fluid stringing tube well accidents, and the use of non-solid phase killing fluid (especially bromine salt solution) cost is very Therefore, during the test of QHD30 1N 1 high-pressure well, Bohai Oilfield used brine or seawater as the well fluid. After the test was completed, the original well was used to successfully carry out the negative pressure test, which ensured the safety of work and Reduce costs.