双反射偏移技术在南海生物礁灰岩油藏断层和裂缝预测中的应用

摘要

针对南海A生物礁灰岩油田储层横向变化大,内部结构复杂,地震资料分辨率低,对断层和裂缝预测难度大的特点,创新应用近年来发展起来的针对高陡断面、裂缝带等界面产生的双反射波进行偏移成像的双反射偏移技术,对礁灰岩油藏开展了断层与裂缝预测研究,获得了该油田断层和裂缝性质及分布规律,实现了礁灰岩油藏断层和裂缝预测的突破.%For reef limestone oilfield A in South China Sea, it is quite difficult to predict faults and fractures, due to its large lateral changes of reservoir, complex internal configuration and lower seismic resolution. Therefore, a recently-developed technique of duplex wave migration (DWM) was innovationally applied to predicting faults and fractures in the oil reservoirs of oilfield A, because this technique can make migration imaging of double reflections from high-angle fault planes and fracture zones. This application has revealed the distribution of faults and fractures in the oilfield, and resulted in a breakthrough of fault and fracture prediction by this technique in reef limestone reservoirs.