利用井旁地震道评价气层

Gas reservoir evaluation for near-well seismic traces

1. 成都理工学院, 成都 610059;2. 中国新星石油公司石油物探研究所, 南京 210014

Chengdu Institute of Technology, Chengdu 610059

本文提出, 在测井孔隙度、岩心孔隙度的监控下, 借助测井—井旁地震道约束反演的速度, 结合井旁地震道的瞬时振幅、瞬时频率, 建立泥质含量、有效孔隙度计算方程, 用TFI模糊聚类算法识别油气层, 为今后作好储层横向预测, 对井旁地震道进行储层评价作准备。本方法在四川地区的3口井的应用效果较好。

Under the control of log porosity and core porosity, with the aid of velocity obtained from well log-ging and constrained inversion for near-well seismic traces, we build the computation equation of shale content and effective porosity by combining with the instantanans amplitude and instantaneous frequen-cy of near-well seismic traces. The TFI fuzzy clustering algorithm is used to identify gas, which provides the basis for reservoir lateral prediction and evaluation for near-well seismic traces. The application resultof the method in Sichuan area is good.