利用构造导向滤波技术识别复杂断块圈闭

Complex fault-block traps identification with structure-oriented filter

构造导向滤波的实质是针对平行于地震同相轴信息的一种平滑操作,这种平滑操作不超出地震反射的终止形式(断层),其目的是沿着地震反射界面的倾向和走向,利用有效滤波方法去噪,增加同相轴的连续性,提高同相轴终止处(断层)的侧向分辨率,保存或改善断层的尖锐性;在构造导向滤波处理后的地震数据体上进行相干属性计算,可突显小断层。本文针对B盆地R构造断裂发育,构造复杂,断层解释和断层组合困难的特点,采用构造导向滤波技术对地震数据进行处理,再以处理后的地震数据体为基础,应用相干体分析技术,新识别出小断层30多条,重新落实10个复杂圈闭,并按断块圈闭进行井位部署,取得了较好的地质效果。

Structure-oriented filter is a smooth operatorto seismic events that does not operate beyond event terminations.The purpose of the filter is to strengthen continuity of seismic events,to enhance the lateral resolution of the reflection terminations,and to save or improve the fault sharpness.Small faults could be highlighted by coherence attributes of seismic data after structure-oriented filtering.In this paper,structure-oriented filter is applied to seismic data in order to deal with developed faults,complex fault-blocks and complicated structures of Structure R in Bongor Basin.More than 30 small faults and 10 complex fault-blocks are identified through coherence volume analysis on the basis of the filtered data.Wells are deployed and good results are achieved.