摘要
压裂水平井技术是开发低渗透油藏的优势技术,地质设计是压裂水平井成功的基础。通过数值模拟和油藏工程方法,对水平井与地层应力方向的配置、裂缝间距、裂缝长度和裂缝导流能力进行了优化。结果表明,压裂水平井应垂直于地层最大主应力,合理的裂缝间距为极限控油半径的2倍,无因次裂缝长度为0.5～0.6,不同的储层渗透率具有与之匹配的最佳裂缝导流能力。现场应用压裂水平井6口,日产油均在在10t以上,为相邻直井的2倍以上。
Technique of fractured horizontal well was an advanced technique in low-permeability reservoir development. Geologic design was the basis of successful fracturing of horizontal wells. By using numerical simulation and method of reservoir engineering and the arrangement of main stress,rational fracture span is 2 times as big as limited oil control radius, dimensional fracture length is 0.5~0.6, different reservoir permeabilities have optimal conductance matching with it. It is used in 6 wells with daily production rate over 10t, which is 2 times as high as wells nearby.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2009年第2期120-122,共3页
Journal of Oil and Gas Technology
基金
国家科技重大专项课题(2008ZX05022)
关键词
低渗透油藏
压裂水平井
优化设计
裂缝间距
裂缝导流能力
low permeability reservoir
fractured horizontal well
optimized design
fracture span
fracture conductance
