一种新的曲流河点坝侧积层建模方法  

A new stochastic modeling method for 3-D forecasting lateral accretion beddings of point bars in meandering rivers

作　　者：尹艳树[1] 张昌民[1] 李少华[1] 王军[2] 王延忠[2] 龚蔚青[2] 

机构地区：[1]长江大学地球科学学院,湖北荆州434023 [2]中国石化胜利油田分公司地质科学研究院,山东东营257015

出　　处：《石油学报》2011年第2期315-319,共5页Acta Petrolei Sinica

基　　金：国家科技重大项目(2008ZX05011-3);国家自然科学基金项目(No.40902043);湖北省自然科学基金项目(2008CDB390)联合资助

摘　　要：根据曲流河储层系统的层次性,以层次建模为指导,首先建立了曲流河的分布模型,随后提取每一条曲流河中线,计算不同位置处曲流河曲率,根据曲流河中线曲率大小,确定点坝位置。在点坝约束下,随机抽样确定侧积层的个数、侧积层水平间距、单个侧积层的倾角以及延伸距离,侧积层的倾向则严格指向废弃河道。另外,建立了中国东部某油田三维点坝侧积层模型,丰富了建模理论,为提高油气采收率提供了方法和技术。Based on the hierarchy of fluvial deposits and guided by the hierarchical modeling,a model for the distribution of meandering rivers was established,and then using channel centre lines,the curvature of a meandering river at different positions was calculated to determine the occurrence of each point bar;finally restricted by point bars,various parameters were forecasted by random sampling,such as the number of lateral accretion beddings,horizontal intervals of lateral accretion beddings,the dip angle and extended distance of an individual lateral accretion beddings,etc.,while the azimuth of lateral accretion beddings pointed strictly to the abandoned channel.A model for lateral accretion beddings of a real reservoir in eastern China was built using this method.The study not only enriched the theory of stochastic modeling but also provided a new method and techniques for the enhancement of oil recovery.

关 键 词：点坝 侧积层 曲流河 建模方法 三维模型 

分 类 号：TE111[石油与天然气工程—油气勘探]