测井曲线重构技术在埕岛油田东斜坡储层预测中的应用

Application of logging curve rebuilding technology in reservoir prediction at east slope of Chengdao Oilfield.

埕岛油田东斜坡地区沉积条件复杂,储层埋藏深,主要以薄层为主。要进行高精度储层预测,分辨有效储层与干层,必须对原始地震资料进行特殊处理。为此,提出了一种利用自然伽马和密度测井曲线同时参考电阻率和电测解释结果对实测声波曲线进行重构的方法,利用重构后的拟声波曲线进行储层预测,突出了砂、泥岩速度之间的差异。同时,多条测井曲线到井旁地震数据的非线性映射相关程度好,证明对实测声波曲线进行重构符合实际情况,效果明显,为储层预测反演提供了基础条件。

Sedimentary conditions in east slope of Chengdao oilfield are complex.Reservoirs are buried deeply,and are mainly thin layers.Special processing of seismic data is necessary to perform high-precision reservoir prediction and distinguish hydrocarbon-bearing reservoirs from dry layers.This paper put forward a method that rebuilds a pseudo AC curve jointly from natural gamma,density,and resistivity log.The rebuilt pseudo AC curve enlarges the velocity difference between sand and mudstone,which is favorable for reservoir prediction.