裂缝性油藏水平井产能计算方法  

A Computational Method for Productivity of Horizontal Well in Naturally Fractured Reservoirs

作　　者：程林松[1] 皮建 廉培庆[1] 黄世军[1] 

机构地区：[1]中国石油大学(北京)石油工程学院,北京102249 [2]中海油研究总院,北京100027

出　　处：《计算物理》2011年第2期230-236,共7页Chinese Journal of Computational Physics

基　　金：国家自然科学基金(90210019);教育部高等学校博士学科点专项科研基金(20060425001);教育部新世纪优秀人才支持计划(NCET-05-0108)资助项目

摘　　要：根据裂缝性油藏水平井渗流特征,将渗流区域等效为近井区域和远井区域.远井区域视为连续均匀介质.在近井区域,基于势叠加、镜像反映原理和微元线汇思想,建立考虑天然裂缝和水平井生产段共同渗流的耦合模型.组合两个流动区域得到裂缝性油藏水平井产能评价模型,并进行求解.实例计算结果表明,由于考虑了裂缝之间的干扰,用建立的模型计算的水平井产能小于用理论公式计算的水平井的产能,与实际产能比较接近;随着裂缝密度增加,产量逐渐增加,但增加的幅度降低.Based on flow characteristics of horizontal wells in naturally fractured reservoirs,vadose area is divided into two zones： near wellbore zone and far wellbore zone.The far wellbore zone is featured by its continuous homogeneity.In near wellbore zone,a coupling model is established considering fluid flow in fracture and horizaontal well simultaneously.Principles of potential superposition and mirror reflection as well as the concept of infinitesimal line congruence are used in the model.Combining flow characteristics of the far and near wellbore zones,a comprehensive computational method for fractured hoizontal well productivity is presented.A practical case is used to verify this method.Computational result shows that productivity of horizontal well calculated with this method is closer to actual flow rate than theoretical formula.Productivity of horizontal well increases as fracture density rises,but increment of productivity decreases as fracture density increases.

关 键 词：裂缝性油藏 水平井 产能 耦合模型 

分 类 号：TE312[石油与天然气工程—油气田开发工程]