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通过试井获得地层压力、产量等动态监测资料再借助现代试井分析技术可获取对储层的认知,进而预测气井产能,评价生产状况。而海上气井由于受作业条件、作业成本等因素限制,不便经常开展试井作业,这在一定程度了影响了对气藏的认知。而生产数据分析技术可直接从产量与油压关系出发,通过对特征曲线进行拟合分析,对单井生产动态进行诊断,同时获取地层参数及单井动态储量。将生产数据分析技术引入东海某气藏的单井动态分析中,井的生产动态拟合程度较好,地层参数的评价结果可靠性较高。应用结果表明:可直接采用生产数据借助典型曲线对储层参数进行评价,并为单井产量安排提供依据。该方法对于陆上不便进行压力测试的气井的动态分析具有一定的借鉴意义。
Obtaining reservoir cognition through well test, obtaining dynamic monitoring data such as formation pressure and yield, and using modern well testing technology to predict gas well productivity and evaluate production status. However, due to the limitation of operating conditions and operating costs, offshore gas wells are often inconvenient to conduct well testing, which to a certain extent has affected the cognition of gas reservoirs. The production data analysis technology can proceed directly from the relationship between output and hydraulic pressure. Through the fitting analysis of the characteristic curves, the single-well production dynamic can be diagnosed, and the formation parameters and single-well dynamic reserves can be obtained at the same time. The production data analysis technology is introduced into the single well dynamic analysis of a gas reservoir in the East China Sea. The well production has a good dynamic fit and the evaluation results of formation parameters are highly reliable. The application results show that the production parameters can be directly used to evaluate the reservoir parameters by means of typical curves and provide the basis for single well production arrangement. This method can be used as a reference for the dynamic analysis of gas wells undergoing pressure testing on land.