川东北下三叠统飞仙关组裂缝测井识别与反演

The Logging Identification and Inversion of Feixianguan Formation Fracture of Lower Triassic in Northeast Sichuan

裂缝性碳酸盐岩储层非均质性较强,单一应用某种测井资料对裂缝进行识别和评价往往满足不了精细描述的需要。经岩心观察与常规测井、成像测井资料对比,建立裂缝在测井资料上的识别特征和识别方法。利用深浅侧向电阻率(RLLD、RLLS)、补偿声波(AC)、补偿中子(CNL)、补偿密度(DEN)、自然伽马(GR)、无铀伽马(KTh)等测井响应特征与微电阻率扫描成像测井(FMI)图像特征进行裂缝识别,计算裂缝几何参数,评价裂缝有效性和发育程度,经实际对比应用,具有较好的效果。

The heterogeneity of fractured carbonate reservoir is stronger.Single-use some sort of logging data to identify and evaluate the fracture is often unable to meet the need for detailed description.The fissure identification feature and methods were established on logging data after contrasting core description,conventional logging and image logging.Utilizing the responses of dual laterolog,acoustic log,compensated neutron log,compensated density log,natural gamma ray log,gamma ray without uranium log and formation micro image log,the fractures were indentified,the fracture geometry parameter was calculated and the fracture effectiveness and development degree were evaluated.The practical application indicated the methods had good effect.