常规测井方法在川西南地区储层裂缝识别中的应用

Application of conventional well logging method in reservoir fracture identification in southwest Sichuan

在低渗透储层油气藏中,裂缝作为一类重要的油气储集空间和运移通道有重要的研究价值.在总结前人裂缝识别预测研究的基础上,利用多种常规测井方法对川西南地区某工区的A井进行探测,通过交会图法确定裂缝骨架参数进而利用测井资料对裂缝孔隙度、次生孔隙度参数进行计算,最后结合成像测井资料对该区的裂缝发育程度进行综合预测.结果表明,在该井的3 423～3 438 m处裂缝发育程度较好,与地质资料相吻合,并为今后川西南地区的油气勘探开发提供参考依据.

In low-permeability reservoirs,as a kind of important reservoir space and hydrocarbon migration channel,fractures are of important research value.On the basis of summarizingpredecessors' fracture identification prediction research,using a variety of conventional logging methods to detect A well in southwest China's Sichuan,by crossplot method to determine fracture frame parameters,based on logging data to calculate fracture porosity and secondary porosity parameters.Finally,in combination with imaging logging data to carry out comprehensive prediction of fracture development degree.The results indicate at the depth of 3 423~3 438 m,the fracture development degree is good,which is in consistent with geological data and this provides a reference basis for oil and gas exploration and development in southwest Sichuan.