多分量地震技术在裂缝性储层预测中的应用

APPLICATION OF MULTI-COMPONENT SEISMIC TECHNIQUE IN THE PREDICTION OF FRACTURED RESERVOIRS

传统的三维地震、水平井钻井和水力压裂技术是开发非常规油气资源的有效手段,应用于复杂油气藏识别与描述的3C-3D、9C-3D等地震技术能够有效降低勘探风险.在美国阿巴拉契亚盆地进行的裂缝性页岩气储层研究结果表明：利用纵波和转换横波联合解释技术能够提高断裂解释和天然裂缝性页岩储层预测的精度.基于纵波、转换横波联合反演提取纵横波速度比、密度等属性参数并验证了裂缝预测成果,进而提高了天然微裂缝储层“甜点”预测的准确性和可靠性.

Conventional 3D seismic, horizontal drilling and hydraulic fracturing are the effective methods to devel- op unconventional oil and gas resources, the seismic techniques such as 3C-3D, 9C-3D and so on which have been applied in the complex reservoir identification and characterization can effectively reduce the exploration risks. The results of the fractured reservoir researches for the shale in Appalachian Basin in the United States show that the joint interpreting technique of P-wave and converted shear wave can improve the precisions of both the fault inter- pretation and natural fractured shale reservoir prediction. Based on the joint inversion results of the above two waves, the attribute parameters such as the velocity ratio of the waves and so on are extracted, and moreover the prediction results for the fractures are verified, thus the accuracy and reliability of the prediction for the naturally micro-fractured reservoir ＂sweet spot＂ are improved.