摘要
在高倾角断块油藏中,受重力作用影响,高、低部位油井开发效果差异大。运用物理模拟实验分析了地层倾角对高、低部位油井开发效果的影响,推导了考虑均衡驱替的水驱断块倾角油藏高、低部位油井产液量配比计算方法,并通过与数值模拟结果对比,验证了油井产液量配比计算方法的准确性。研究发现:随着储层倾角的增加,高部位流线变少、水驱波及区域变小、采出程度变低。随着储层倾角增加,达到均衡动用所需的油井产液量配比(高部位油井产液量与低部位油井产液量比)增加。在相同储层倾角的情况下,随着原油密度和注水强度增加,倾角对达到均衡驱替所需的油井产液量配比的影响变弱,油井产液量配比降低。该研究对高倾角断块油藏均衡开发具有指导意义。
In high-dip fault-block reservoirs,the development effects of oil wells at high and low positions vary greatly due to the influence of gravity.The physical simulation was used to explore the influence of dip angle on the development effect,and the calculation method of liquid production ratio of oil wells at high and low positions in water drive fault block reservoirs considering balanced displacement was derived.The accuracy of the calculation method of liquid production ratio of oil wells at high and low positions was verified by comparing with the numerical simulation results.It is found that with the increase of reservoir dip angle,the streamline at high position becomes less,the water drive swept area becomes smaller,and the recovery degree becomes lower.With the increase of reservoir dip angle,the liquid production ratio of the oil wells required for balanced production(the ratio of liquid production of high position oil wells to that of low position oil wells)increases.In the case of the same reservoir dip angle,with the increase of crude oil density and water injection intensity,the effect of dip angle on the fluid production ratio of oil wells required for balanced displacement becomes weak,and the fluid production ratio of oil wells decreases.This study is of great significance for balanced development of high dip fault block reservoirs.
作者
王群一
马晓丽
蒋明洁
李丹
毕永斌
顾潇
WANG Qun-yi;MA Xiao-li;JIANG Ming-jie;LI Dan;BI Yong-bin;GU Xiao(Exploration and Development Research Institute of Jidong Oilfield Company,PetroChina,Tangshan 063004,China)
出处
《科学技术与工程》
北大核心
2024年第2期538-544,共7页
Science Technology and Engineering
基金
国家科技重大专项(2016ZX05011-002-003)
国家自然科学基金(51974343)。
关键词
高地层倾角
断块油藏
均衡驱替
产液量配比
物理模拟
high dip angle
fault block reservoir
balanced displacement
liquid production ratio
physical simulation
