Title

Computation of 3D volumetric curvature based on plane-wave destruction

单位

(1.中国石油天然气股份有限公司勘探开发研究院西北分院,甘肃兰州730020;2.CNPC油藏描述重点实验室,甘肃兰州730020)

Organization

(1.Northwest Branch of Research Institute of Petroleum Exploration & Development,PetroChina,Lanzhou 730020,China;2.Key Laboratory of Reservoir Characterization,CNPC,Lanzhou 730020,China)

摘要

体曲率属性相对于层位曲率属性具有较多优点,其计算关键在于倾角数据体的计算,因此在计算中引入了平面波解构法。首先沿三维地震数据体的纵测线和联络测线方向利用平面波解构法估算每一个剖面的倾角,将三维地震数据体转化为视倾角数据体;然后根据曲率属性计算原理将视倾角数据体转换为体曲率属性,实现基于平面波解构的三维体曲率计算方法。实际资料应用表明,该计算方法具有计算效率高、稳定可靠的优点,计算得到的体曲率属性明显优于利用解释层位数据得到的层位曲率属性和利用相干扫描法得到的体曲率属性,具有较好的应用前景。

Abstract

Volumetric curvature attributes have many advantages over horizon curvature attributes,and the key to its calculation lies in the calculation of dip volumes.In this study,the plane-wave destruction (PWD) method was adopted for dip volumes calculation.First,the PWD method was used to estimate the dip field for each profile along the inline and crossline direction of the 3D seismic data to transform the 3D seismic data volume into apparent dip volumes.Then,apparent dip volumes were converted into volumetric curvature according to the calculation principle of curvature attributes.Field data tests showed that this method is highly efficient,stable,and capable in describing structural details.The volumetric curvature attributes obtained by this method are superior to the horizon curvature attributes via horizon interpretation and volumetric curvature attributes by coherency scanning.

关键词：

平面波解构; 体曲率; 倾角; 斜率; 相干; 河道; 裂缝;

Keywords:

plane-wave destruction,; volumetric curvature,; dip,; slope,; coherence,; channel, ; fracture;

基金项目

国家科技重大专项子课题(2017ZX05018-005)和中国石油天然气集团公司科技项目(2016A-3303)共同资助。

DOI

10.3969/j.issn.1000-1441.2018.06.011