惠民凹陷复杂断块精细描述技术及应用

The fine description technique of complex fault blocks and its application in Huimin Depression

在惠民凹陷老区挖潜和发现隐蔽断块油气藏的研究中,逐步发展和完善了一项综合的复杂断块精细描述技术。该技术包括地震叠后处理,多元综合标定,断块精细构造描述,储层预测及断块综合评价等。地震数据体的叠后处理及多元综合标定是断块精细描述的基础;精细断块构造描述、储层描述及断层封堵分析为断块圈闭评价提供依据;断块综合评价是断块成藏分析的目的和归宿。该技术应用油藏描述方法,精确刻画断块的构造形态,预测储层横向变化,结合钻井、试油、试采及生产等动静态资料,对各构造单元进行断块分类和评价,进而优选钻探目标。

A fine description technique of complex fault blocks has been developed in the efforts to tap potentialities and search subtle fault block pools in the mature areas of Huimin Depression. This technique consists of seismic post-stack processing, multivariate composite calibration, fine description of fault blocks, reservoir prediction and overall evaluation of fault blocks. Post-stack processing of seismic data set and multivariate composite calibration provides a base for fine description of fault blocks. Fine description of fault blocks, reservoir description, and analysis of fault blocking provide evidences for evaluation of fault block trap. Overall evaluation of fault blocks is the ultimate objective of analysis of hydrocarbon-accumulated fault blocks. Based on the structural features and lateral variations of a reservoir obtained by the method, and supplemented with data of drilling, logging, and production test, the type of fault block for each structural unit are classified and evaluated, drilling targets are then determined. Desired results have been obtained by applying the method to the exploration in the central uplift belt of Huimin Depression.