叠前同时反演技术在砂砾岩体有效储层预测中的应用  

Application of prestack simultaneous inversion technique in effective reservoir prediction of sand-gravel body

作　　者：高云[1,2] 朱应科[3] 赵华[3] 代磊[3] 

机构地区：[1]中国地质大学(北京)能源学院,北京100083 [2]胜利油田东胜精攻石油开发集团股份有限公司,山东东营257000 [3]中国石油化工集团公司胜利石油管理局物探研究院,山东东营257200

出　　处：《石油物探》2013年第2期223-228,114,共6页Geophysical Prospecting For Petroleum

摘　　要：东营凹陷北部陡坡带发育大量的砂砾岩体,地震剖面上表现为顶强内乱的地震反射特征。由于砂砾岩扇体根部自身具有油气封堵能力,中深层砂砾岩体多数含油。但从目前开发情况看,砂砾岩体内部物性、含油性变化快,因此在该区开展储层物性预测及油气检测工作尤为重要。叠前同时反演技术利用叠前分角度叠加数据及纵波、横波、密度测井资料,可以同时反演出与储层岩性、物性相关的多种岩石物理参数和弹性参数,用于综合判别储层的物性及含油气性。在东营北带中深层I类AVO响应的砂砾岩体物性及含油气性预测中,利用叠前同时反演较为准确地预测了砂砾岩体有效储层及其平面分布范围,为砂砾岩体油藏的开发提供了可靠的依据。Abundant sand-gravel body is developed in the north of the steep-slope zone of Dongying Sag,which displays strong top reflection and disordered internal reflection on the seismic sections.Because of the hydrocarbon sealing ability in the root of sand-gravel fans,most of these in deep layers are rich in oil and gas.However,the physical properties and oil-bearing potential varies largely in the sand-gravel body,therefore,it is important to carry out physical properties prediction and hydrocarbon detection in the area.Pre-stack simultaneous inversion utilizes prestack incident-angle stack data as well as P-wave,S-wave and density logging data,and can simultaneously invert many rock physical parameters associated with lithology and physical properties to comprehensively evaluate the reservoirs.In the prediction of the physical properties and oil-gas potential of sand-gravel body with the first class of AVO response in the deep layers of northern Dongying Sag,we use prestack simultaneous inversion technique to accurately predict the depth and plane distribution of effective reservoirs.The technique provides us a reliable basis for the development of sand-gravel body reservoirs.

关 键 词：砂砾岩体 叠前同时反演 分角度道集 弹性参数 储层预测 油气检测 

分 类 号：P631.4[天文地球—地质矿产勘探]