利用地震信息预测储层裂缝发育带

Using Seismic Data to Predict Fractured Zones of Reservoir

1. 石油大学资源系,东营257062;2. 新疆石油管理局地球物理研究所,乌鲁木齐830016

Resource Department, Petroleum University, Dongying 257062

针对裂缝性油气田已经成为今后油气勘探开发的主攻目标,尝试了利用地震资料识别和预测储层裂缝发育带的 4种方法技术,即 (1)叠后三维地震数据相干体分析技术;(2)叠后三维地震数据体沿层构造属性分析技术;(3)叠后三维地震数据体目标层介质平均吸收参数分析技术;(4)叠前三维地震数据体的AVO及AVA分析技术。实践表明,利用地震资料研究储层裂缝及其发育带确实有较大的难度,但在资料信噪比较高的前提下,充分利用包含着丰富地质信息的三维数据体可以得到令人满意的地质效果。

Because fractured reservoirs have become the main target of exploration,this paper propounds the following four methods are used to identify and predict fractured zones of reservoir viaseismic data:(1)coherence cube analysis of stacked 3D seismic data;(2)structural attribute analysis along horizons of stacked 3D seismic data set;(3)average absorpt ion parameter analysis for formation of interest of stacked 3D seismic data set;and(4)A VO and AVA analysis of pre-stack 3D seismic data.The practice shows that although it is difficult to investigate reservoir fractures and their extension zones via seismic data,satisfactory results can still be reached by taking full advantage of 3D data on condition that the data are of high S/N ratio,thus contains plenty of geologic information.