叠前偏移成像技术在东濮凹陷复杂断块区的应用

Prestack migration imaging in a complex fault block of Dongpu Depression

东濮凹陷的主要地震、地质特点是目的层埋藏深、断裂体系复杂、储集层单层厚度薄。为了提高勘探、开发效益,精确刻画地下复杂断裂体系,结合东濮高精度三维地震资料的特点,开展了叠前数据规则化、高密度自动速度拾取、各向异性偏移和弯曲射线偏移等技术研究,形成了一套适用于东濮凹陷复杂断块区的高精度三维地震资料叠前偏移关键技术,有效地提高了高精度三维地震资料的品质和成像精度,为勘探、开发提供了可靠的地震成果资料。

Dongpu Depression is geologically characterized by deeply-buried targets,complex fracture systems and thin beds.In order to accurately depict complex subsurface fracture system,we have conducted prestack migration imaging approach including prestack data regularization,high density automatic velocity picking,anisotropic migration and curved ray migration etc.Based on high density 3Dseismic data,this approach improves greatly 3Dseismic data imaging,and provides reliable final results for future exploration and development.