井震反演识别复合砂体内单一河道  

Recognition of Single Channel in Composite Sand Body Based on Well-seismic and Inversion

作　　者：徐立恒[1] 郝兰英[1] 刘江玉[1] 

机构地区：[1]中国石油大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《西南石油大学学报（自然科学版）》2014年第2期64-70,共7页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：国家重点基础研究发展计划(2009CB219307)

摘　　要：随着开发井网依次加密,储层砂体分布趋势逐渐明确,在纵向上可根据测井资料准确地识别砂体,但横向上很难确定井间砂体的分布特征。针对连井剖面上进行单一河道识别任务重且存在多解性的难题,提出了采用井震结合反演技术来预测复合砂体内单一河道的边界,再进一步利用测井曲线特征对河道边界进行验证。基于该思路,在反演剖面上识别了复合砂体内单一河道的4个典型标志,并依据地震反演属性平面图上的砂岩变差带发育位置,清晰识别出8条同层不同期单一河道,且单一河道识别成果在完善油田注采关系、挖潜剩余油上见到良好效果,展现了较好的应用前景。With the well pattern successively infills,the distributing tend of reservoir sandbody is gradually determined,the distributing characteristics of sandbody in vertical direction can be accurately recognized according to the logging data,but that in horizontal direction is difficulty to be identified. Aiming at the problems of the heavy tasks and the ambiguity on the recognition of a single channel on well-tie sections,the technique of well-seismic and inversion to predict the boundary of a single channel in composite sand body was proposed in the paper,and the river channel boundaries were further proved by the logging curve characteristics. Four typical indicators of the single river channel in composite sand body are recognized on the inversion sections,8 synchronous but not simultaneous single channels are identified clearly by sandstone poor belt conditions of the seismic inversion plan. With the single channel recognition achievement,good effects are obtained on the injection-production relation and remaining oil tapping,which shows a good application prospect.

关 键 词：井震结合 反演技术 单一河道 复合砂体 识别 

分 类 号：TE132[石油与天然气工程—油气勘探]