低幅构造油藏注水开发方式优选及合理工作制度研究  

Study on optimization of waterflood development mode and reasonable working system in low amplitude structure reservoir

作　　者：杨晋玉 郑奎 胡刚 李彦秋 YANG Jinyu;ZHENG Kui;HU Gang;LI Yanqiu(Oil Production Plant 6 of PetroChina Changqing Oilfield Company,Xi'an Shaanxi 710018,China)

机构地区：[1]中国石油长庆油田分公司第六采油厂,陕西西安710018

出　　处：《石油化工应用》2024年第12期63-67,共5页Petrochemical Industry Application

摘　　要：鄂尔多斯盆地H油田侏罗系油藏普遍具有含油面积小、边底水发育和构造幅度低的特征,主要采用面积注水方式进行开发,存在含水率上升速度快和油藏最终采收率低的问题。为了研究鄂尔多斯盆地H油田低幅构造侏罗系边底水油藏合理开发方式及油水井合理工作制度,以油藏实际地质参数为基础,构建了低幅构造边底水油藏理论模型。模拟了面积注水和边缘注水方式下的水驱开发效果,并利用财务现金流方法对两种开发方式进行了评价,同时,对研究区油藏油水井工作制度:转注时机、采液强度、注水强度和注采比等参数进行了模拟研究。研究结果表明:边缘注水开发方式能有效提高水驱波及面积,促使油井均匀见效,对低幅构造边底水油藏具有更强的适应性,且能获得更好的经济效益;在边缘注水开发方式下,研究区采油井合理转注含水率为85.0%~90.0%;合理采液强度、合理注水强度、合理注采比分别为1.1 m3/(d·m)、2.0 m3/(d·m)、1.15。该研究成果对同类油藏的水驱开发具有一定的借鉴作用。Jurassic reservoir in H oilfield,Ordos Basin are characterized by small oil-bearing area,edge and bottom water and low structural amplitude.It's mainly developed by pattern water flooding,which has the problems of rapid rate of water cut increase and low final oil recovery.In order to study the reasonable development mode and reasonable working system of production and injection wells for the low amplitude structure Jurassic reservoir with edge and bottom water in H oilfield in Ordos Basin,a theoretical model of low amplitude structure reservoir with edge and bottom water is constructed based on the actual geological parameters of the reservoir.The effect of pattern water flooding and peripheral water flooding is simulated,and two development methods are evaluated by using the financial cash flow method.At the same time,the working system of produce and injection wells in the reservoir of the study area is simulated,including time of water injection,fluid producing intensity,water injection intensity,injection-production ratio.The research results show that the peripheral water flooding development mode can improve the swept area effectively,and make the production wells respond uniformly,which has stronger adaptability to low amplitude structural reservoir with edge and bottom water and can get better economic benefits.Reasonable water cut of production wells to be reinjected is between 85.0%~90.0%in the study area and reasonable fluid producing intensity,water injection intensity,injection-production ratio is 1.1 m3/(d·m),2.0 m3/(d·m),1.15.The research results have a referential significance for the water flooding development of the similar reservoir.

关 键 词：低幅构造 数值模拟 边底水 注水方式 合理工作制度 

分 类 号：TE357.62[石油与天然气工程—油气田开发工程]