面向复杂山前带的深度域地震成像处理研究

山前构造带具有良好的圈闭条件，是油气资源富集的重要场所，但“复杂地表、复杂地下”的双复杂地震地质条件给地震勘探造成了极大困扰。针对双复杂地震地质条件造成的一系列地球物理难题，以拟真地表地震资料处理思路为纽带，以高保真的叠前预处理为基础，以递进式深度域速度分析与建模为关键，以起伏地表逆时叠前深度偏移成像为核心，建立了一套面向复杂山前带的深度域高精度地震成像处理流程。实际资料处理结果验证了该处理流程的正确性及有效性，为复杂山前带油气勘探提供了有效的地震资料处理技术支撑。

Piedmont tectonic belt is characterized by good trap conditions,which is an important area for hydrocarbon accumulation.But the double-complex seismic & geologic conditions (complex surface and complex underground conditions) cause great trouble in seismic exploration.In order to solve the problem,we build up a set of depth domain and high-precision seismic imaging processing workflow facing the complex piedmont belt.This workflow ties the processing approach on with simulated surface seismic data,and is based on the high fidelity of prestack preprocessing.Depth domain with progressive type velocity analysis and modeling is the key of the flow.Irregular topography prestack reverse-time depth migration imaging is the core of the flow.The actual data processing verifies the correctness of the concept and the effectiveness of the technology used in this paper.Thus it provides a strong technical support for complex piedmont belt of oil and gas exploration.

国家科技重大专项(2011ZX05014-001-002)和国家自然科学基金项目(41374117)联合资助。