低渗透油藏转向压裂产能预测及影响因素  

Productivity Prediction and Influencing Factors of Low Permeability Reservoirs After Steering Fracturing Stimulation

作　　者：蒲晓 郭大立[1] 兰天[2] 贺勇[3] 赵运祥 PU Xiao;GUO Dali;LAN Tian;HE Yong;ZHAO Yunxiang(School of Sciences,Southwest Petroleum University,Chengdu,Sichuan 610500,China;PetroChina Xinjiang Oilfield Company,a.Oil Production Plant No.1,Karamay,Xinjiang 834000,China;PetroChina Xinjiang Oilfield Company,Baikouquan Oil Production Plant,Karamay,Xinjiang 834000,China)

机构地区：[1]西南石油大学理学院,成都610500 [2]中国石油新疆油田分公司采油一厂,新疆克拉玛依834000 [3]中国石油新疆油田分公司百口泉采油厂,新疆克拉玛依834000

出　　处：《新疆石油地质》2021年第1期76-80,共5页Xinjiang Petroleum Geology

基　　金：国家科技重大专项(2017ZX05070)。

摘　　要：转向压裂可以扩大低渗透储集层泄油面积,达到体积压裂的效果。但转向压裂形成的转向裂缝分布复杂,需要进行精细表征,才能准确预测产能。依据克拉玛依油田的生产资料,针对转向裂缝形态特点,建立储集层中单相流动的数学模型,采用局部网格加密技术,对转向裂缝进行网格细化。经过实例应用,转向压裂后产油量比常规压裂产油量提高了5.3倍。对影响转向压裂产能的影响因素进行评价,结果表明,产油量与储集层渗透率、转向裂缝长度和初次压裂裂缝的导流能力呈正相关,无需很高的转向裂缝导流能力。Steering fracturing can expand the drainage area of low permeability reservoirs and achieve the effect of volume fracturing.How⁃ever,the fractures induced by steering fracturing are complicated,and should be finely characterized to accurately predict the post⁃fractur⁃ing productivity.Based on the production data from Karamay oilfield,and in view of the characteristics of steering fractures,a mathematical model of single⁃phase flow was established,and a grid refinement technology was used to densify the steering fractures.Field application has proved that the oil production after steering fracturing was 5.3 times higher than that of conventional fracturing.The factors influencing the productivity after steering fracturing were evaluated and the result shows that the production is positively correlated with reservoir per⁃meability,steering fracture length and conductivity of initial induced fractures,but not necessarily depending on steering fractures to get a high flow conductivity.

关 键 词：低渗透油田 转向压裂 局部网格加密 网格细化 数学模型 产能预测 影响因素 

分 类 号：TE357.14[石油与天然气工程—油气田开发工程]