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为正确认识页岩气储层的地质特征、储层参数,在压裂改造前需进行测试以对储层进行识别分析。相对于常规关井测压工艺存在恢复时间长等因素影响,微注压降测试工艺施工周期短、占用设备少,是一种经济、高效、安全的试井手段。通过对涪陵页岩气示范区A井的微注压降测试数据进行分析,基于G函数曲线的特征识别和裂缝闭合后分析,获得了超低渗透页岩储层参数,地层压力等资料,为压裂试气工艺优化、产能评价提供可靠的依据。
In order to correctly understand the geological characteristics and reservoir parameters of shale gas reservoirs, we need to conduct tests to identify and analyze reservoirs before fracturing. Relative to the conventional shut-in pressure measurement process there is a long recovery time and other factors, micro-injection pressure drop test process is short, less equipment occupancy, is an economical, efficient and safe test well. Based on the analysis of micro-pressure drop test data of Well A in Fuling shale gas demonstration area, the parameters of ultra-low permeability shale reservoir and formation pressure are obtained based on the identification of G function curve and post-fracture closure analysis. Fracturing test gas optimization process, capacity evaluation to provide a reliable basis.