摘要
对实施整体压裂开发的裂缝性低渗透油藏,用电解模拟的方法研究了四种人工裂缝穿透比情况下,天然裂缝方位、位置、长度和裂缝数量对菱形井网、矩形井网和五点井网压力分布及产量的影响规律。结果表明,天然裂缝在有利的位置及方位下,能降低油水井近井地层的压力梯度;提高注入水的波及区域,提高较远处地层的压力,使油井增产;增加天然裂缝的长度或数量,产量相应增加;人工缝穿透比越小,天然裂缝的增产幅度越大。分析了天然裂缝增产的原因,并对裂缝性低渗油藏开发井网的部署及增产方法提出了建议。
The electric - analogy - modeling experiment is used to study the Influence of azimuth, position, length, number of naturally fracture on diamond shaped pattern, rectangular pattern, five spot well - patterns and output in naturally fractured low - permeability reservoir developed by integral - fracturing technology. The results show that the pressure gradients near the oil well and flood well are decreased when the natural fractures are in the favorable azimuth and position; and the sweep region of flood water is enlarged and the pressure far from the well in the reservoir is enhanced, and the production of well is increased. The more the length, number of natural fracture are, the more the productions increase. The increasing amplitudes of production increased when natural fracture is declined with the increase of the length of hydraulic fracture. The reasons of the natural fracture improving the production are analyzed. And the advices that how to arrange the well patterns and increase the production when the natural fractures are existed are proposed.
出处
《钻采工艺》
CAS
北大核心
2006年第2期42-45,123-124,共4页
Drilling & Production Technology
基金
国家自然科学基金项目
项目名称:西部深层变形介质复杂油气非线性渗流模型
项目编号:90210019
关键词
低渗透
整体压裂
天然裂缝
电模拟
low-permeability, integral -fracturing, natural fracture, electric analogy
作者简介
冯金德（1974-），在读博士研究生；研究方向为油气田开发理论与系统工程。地址：（102249）北京市昌平区中国石油大学251号信箱。电话：（010）89733726。E-mail：kind．f@163．com
