弹性阻抗反演在储层含气性预测中的应用  

Gas-bearing reservoir prediction by elastic impedance inversion

作　　者：刘百红[1] 李学云[2] 李建华 莫阿玲 项亮[1] 郑四连[1] 

机构地区：[1]中国石化石油物探技术研究院,江苏南京210014 [2]天津市地质调查研究院,300191 [3]东方地球物理公司研究院地质研究中心,河北涿州072751 [4]东方地球物理公司研究院海外业务部,河北涿州072751

出　　处：《石油地球物理勘探》2012年第A01期72-77,167+162,共6页Oil Geophysical Prospecting

基　　金：国家科技重大专项(2011ZX05035-006)资助

摘　　要：本文在阐述弹性阻抗反演原理的基础上,介绍了利用叠前弹性阻抗反演进行储层含气性预测的基本思路:①计算井旁道的弹性阻抗曲线;②将炮检距数据转换为角道集数据;③估算角度域数据对应的子波;④利用反演算法计算弹性阻抗剖面;⑤提取弹性参数。将该方法应用于鄂尔多斯盆地A区进行含气储层预测,获得了较好的预测结果,证实了该方法的可行性和有效性。On basis of the principle of the prestack elastic impedance inversion,we present in this paper an idea to predict gas-bearing reservoir using the prestack elastic impedance inversion.Firstly we calculate elastic impedance curves of traces near wells.Secondly we transform prestack seismic data from offset domain to angle domain.Thirdly we estimate seismic wavelets corresponding to different angles.Then we perform inversion to obtain elastic impedance sections.Finally we extract various elastic parameters.Applications of this prestack elastic impedance inversion to seismic data from Block A,Erdos Basin obtain good results,and demonstrate its feasibility and effectivity of gas-bearing reservoir prediction.

关 键 词：叠前反演 储层预测 含气性 弹性阻抗 

分 类 号：P631[天文地球—地质矿产勘探]