大庆长垣萨尔图地区扶余油层低孔渗储层地震叠前描述  

Low Porosity and Low Permeability Reservoir Prestack Characterization within Fuyu Formation of Saertu Survey in Changyuan Tectonic Belt of Daqing Oilfield

作　　者：孙夕平[1] 张研[1] 张尔华[2] 陈树民[2] 谢占安[1] 李昂[2] 张明[1] 宋永忠[2] 胡英[1] 陈斌[2] 刘卫东[1] 周超[1] 方兴[3] 徐凌[1] 甘利灯[1] 

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国石油大庆油田公司勘探开发研究院,黑龙江省大庆市163712 [3]中国矿业大学(北京),北京100083

出　　处：《中国石油勘探》2011年第5期148-156,175,共9页China Petroleum Exploration

基　　金：中国石油天然气股份有限公司物探技术攻关项目"大庆长垣扶余油层低孔渗储层地震叠前描述"(2010-03-03)

摘　　要：大庆长垣薄互储层预测是制约增储上产的主要瓶颈,主要面临单层薄、物性差、油藏规律不清、有效储层预测精度低等难题。围绕地震保幅处理、提高分辨率和有效的叠前预测几个方面展开研究,取得了一系列技术成果。在保幅处理方面,探讨出炮检域两步法反褶积、各向异性叠前时间偏移、道集规则化处理等配套技术。在提高分辨率方面,通过去T2屏蔽、道集提高分辨率、中远道子波拉伸校正、有效炮检距优选等手段,有效拓展频带,压制薄互层干涉作用。在叠前储层预测方面,通过AVO定性描述储层、孔隙度定量预测、叠前弹性反演等技术,描述出有效储层,在萨尔图地区,有效储层预测吻合率达78.5%以上。The effectiveness of thin interbed prediction is the main bottleneck restricting the growth of oil production in Songliao Basin. It is confronted with such problems as thin layer, poor property, obscure reservoir disciplines and low predication accuracy of effective reservoir. Study has been conducted on seismic amplitude-preserved processing, resolution enhancement and effective prediction with pre-stack seismic data, and a series of technical achievements have been obtained. A suit of techniques are used to preserve the amplitude in data processing, such as the two-step deconvolution in shot and receiver domain, the anisotropic pre-stack time migration, and the gather regularization, etc. In terms of resolution enhancement, the techniques including the reduction of T2 effect, the enhancement of resolution in pre-stack gathers, the alignment of wavelet stretching in far-middle offset, and the optimization of effective offset distance are used to expand frequency band and reduce interference of thin interbed. In the aspect of prediction with pre-stack seismic data, the techniques including AVO qualitative reservoir description, quantitative porosity prediction, and pre-stack elastic impedance inversion are used to delineate the thickness of effective reservoir. Through the application of the techniques above, the matching probability of reservoir prediction is higher than 78.5% in Saertu survey.

关 键 词：薄互层 炮检域两步法反褶积 调谐能量增强法 拟横波反射率 叠前弹性反演 大庆长垣 

分 类 号：P631.4[天文地球—地质矿产勘探]