叠前纵横波联合反演技术在PH油气田薄储层预测中的应用

An application of pre-stack simultaneous inversion of P-and S-wave to thin reservoir prediction in PH field

PH油气田已进入开发中后期,其主力产层之一的HA储层埋藏深、厚度薄、物性横向变化快,采用单一的叠后纵波阻抗反演技术难以识别和预测薄储层。采用叠前纵横波联合反演方法对PH油气田HA储层进行了预测,实钻结果与钻前预测结果相吻合,使得依据储层预测结果所设计的调整井取得了预期效果,说明叠前纵横波联合反演技术在本地区具有广阔的应用前景。

In PH field in its middle-late development period,HA is one of its major pays,but is deep,thin and sharp in lateral petrophysical changes.Therefore,this thin reservoir can＇t be identified and predicted by a single technique of post-stack P-wave impedance inversion.A pre-stack simultaneous inversion of P-and S-wave was then applied to predict HA reservior in PH field,and the actual drilling results were quite consistent with the predicted results,making the adjustment wells designed from the reservoir prediction have their expected effects.This indicated that the technique of pre-stack simultaneous inversion of P-and S-wave can be applicable widely in this area.