叠前叠后联合反演技术在油气藏精细描述中的应用——以东营凹陷永安镇油田永3井区为例  

Application of pre-stack and post-stack joint inversion in reservoir detailed description-a casestudy in Yong 3 area of Dongying depression

作　　者：慎国强[1,2] 汤婕 王玉梅[2] 钮学民[2] 陈松莉[2] 

机构地区：[1]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [2]中国石化胜利油田分公司物探研究院,山东东营257022

出　　处：《油气地质与采收率》2014年第2期87-90,117,共4页Petroleum Geology and Recovery Efficiency

基　　金：国家重点基础研究发展规划"863"项目"油藏地球物理关键技术"(2011AA060300)

摘　　要：不同的地震反演方法具有不同的适用范围,叠前和叠后反演成果在单独应用时存在一定的局限性。针对东营凹陷永安镇油田永3井区地质情况复杂,油气藏精细描述过程中的储层发育特征难以识别的问题,在岩石物理特征分析、约束模型和算法应用、叠前及叠后成果综合解释分析的基础上,根据叠前及叠后反演在储层预测和流体描述方面的不同侧重点,选用统一的地质约束模型和反演算法控制2种反演方法的关联性,加强了叠前及叠后反演处理成果的一致性和可对比性。开展叠前叠后联合反演技术的研究,实现了油气藏储层特征及流体特性的精细描述。在永3井区沙二段复杂断块油气藏精细描术实际应用中取得了良好的效果,沙二段5砂层组的油层预测准确率达到80%以上。Seismic inversion includes pre-stack inversion and post-stack inversion.There are some limitations when used alone,be-cause both methods have different scope.It is hard to describe the reservoir in Yong3 area because of the complex geological condition.In order to solve this problem,the joint inversion is proposed based on a series analysis of rock physics,model,algorithm and interpre-tation.According to the advantage of each method in reservoir and fluid description,the unified model and algorithm are used to controlthe relevance,as well as improving the consistency and comparability of both results.The joint inversion of pre-stack and post-stackachieves a detailed description of the reservoir and fluid characteristics in Yong3 area with the prediction accuracy rate over 80% of Es2 layer.

关 键 词：叠前叠后联合反演 岩石物理特征 约束模型 地质统计学 油气藏精细描述 

分 类 号：P631.44[天文地球—地质矿产勘探]