摘要
采用压裂水平井井网是开发低渗透油藏的有效手段,但此类井网的缝网参数较多,注水开发使得渗流规律与油水分布更为复杂,诸多参数存在交互作用,井网优化难度增大。针对压裂水平井缝网参数优化过程中面临的问题,按照从局部到整体,从主要到次要的研究思路,分析裂缝半长与裂缝密度对压裂水平井单井产能的影响规律;然后根据裂缝参数技术界限,以最大采出程度和净现值为目标,研究了注采井距、水平段长度、水平井裂缝半长、注水井裂缝半长、排距等缝网参数对目标值的影响规律及相应机理,得出了缝网参数的最优组合,为低渗透油藏压裂水平井网优化提供了方法和借鉴。
The fractured horizontal well pattern is an important technique to develop low permeability reservoirs, but some factors including multiple parameters of fractures and well pattern, more complicated seepage law and oil-water distribution made by water flooding and interaction of some parameters make the optimization of well pattern more difficult. Aiming at the problems encountered in the optimization process of fractures and well patterns of fractured horizontal wells, this paper firstly analyzes the change rule of individual well productivity influenced by the fracture half-length, interval and numbers, and then optimizes the fractures and well patterns according to the sequence from microcosm to macrocosm and from major to minor. On the basis of technical limit for fracture parameters concluded, the influence law and mechanism of well spacing, array-spacing of well pattern, the length of horizontal well, the fracture length of horizontal and injection wells and the fracture length distribution of horizontal well are studied taking aim at recovery percentage and net present value （NPV）, and optimization conclusions are drawn. The study possesses a method and reference for the design optimization of practical patterns of fractured horizontal well program.
出处
《断块油气田》
CAS
2014年第1期69-73,共5页
Fault-Block Oil & Gas Field
基金
国家重点基础研究发展计划(973计划)项目"中国南方海相页岩气高效开发的基础研究"(2013CB228000)
关键词
低渗透油藏
压裂水平井
数值模拟
井网优化
low permeability oil reservoirs
fractured horizontal well
numerical simulation
well pattern optimization
