分段压裂水平井裂缝形态优化及产能特征研究  

Optimization of Fracture Shapes and Productivity Features of Segmented Fractured Horizontal Wells

作　　者：杨子清[1] 陈文龙[1] 杨军侠[1] 苏玉亮[2] 任龙[2] 

机构地区：[1]中石油长庆油田分公司超低渗透油藏研究中心,陕西西安710021 [2]中国石油大学(华东)石油工程学院,山东青岛266580

出　　处：《石油天然气学报》2014年第1期99-103,8,共5页Journal of Oil and Gas Technology

基　　金：国家科技重大专项(2011ZX05013-004)

摘　　要：水平井分段压裂技术被广泛应用于致密油藏注水开发过程中。为了得到与井网匹配最佳的人工布缝形态,基于水平井采油和直井注水的七点井网,利用数值模拟和流线模拟方法,研究了不同裂缝形态对水平井开发效果的影响,并分析了其产能分布特征。模拟结果表明:纺锤型(双缝)裂缝形态在增加远离注水井的压裂段裂缝(中间裂缝)所在区域流线密度、提高水驱波及效率的同时,使水平段不同位置的裂缝含水较均匀上升,可充分发挥中间裂缝的作用,最终采收率较高。研究结果可为分段压裂水平井的施工设计提供理论指导。The segmented fracturing technology of horizontal wells has been widely used for waterflooding development of tight oil reservoir.In order to get the best hydraulic fracturing shapes matching with the well pattern,the numerical simulation and streamline simulation methods were used to study the effects of the different fracture shapes on the development effect of horizontal wells,its productivity distribution features were analyzed.Simulation result shows that the spindle shaped double fractures can increase streamline density of a central fracture far from the injection well and improve swept efficiency of waterflooding,at the same time water content of fractures at different locations in the horizontal sections can be evenly raised,the effect of central fracture could be brought into full plays for a higher ultimate recovery percent.It provides theoretical guidance for design and operation of segmented fractured horizontal wells.

关 键 词：水平井 分段压裂 裂缝形态 产能特征 

分 类 号：TE357.1[石油与天然气工程—油气田开发工程]