动态注采耦合开发特征与适用性及技术政策界限  

Study on both characteristics and applicabilities of dynamic injection-production coupling development and technical policy boundaries

作　　者：王瑞[1] WANG Rui(Exploration and Development Research Institute,Shengli Oilfield Company,SINOPEC,Dongying City,Shandong Province,257015,China)

机构地区：[1]中国石化胜利油田分公司勘探开发研究院,山东东营257015

出　　处：《油气地质与采收率》2022年第2期100-108,共9页Petroleum Geology and Recovery Efficiency

基　　金：国家科技重大专项“复杂断块油田提高采收率技术”(2016ZX05011-002)。

摘　　要：注采耦合技术是近年来提出的提高水驱采收率的有效方法,动态注采耦合是最简单、最常见的一种重要类型,目前尚无明确的定义和针对性的系统研究。基于注采耦合开发特点及类型,明确动态注采耦合技术特点,提出动态注采耦合的定义,深化了动态注采耦合提高采收率的机理认识。以胜利油田典型动态注采耦合单元为例,系统分析复杂断块油藏动态注采耦合的开发特征与开发适用性。在此基础上,评价主控因素敏感性,分析介入时机、注水井注水制度和采油井生产制度等工艺设计参数对开发效果的影响,明确动态注采耦合设计的技术政策界限。结果表明:动态注采耦合呈现先短注后长采和开采后间歇注入2种方式,前者适合多轮开发,后者不适合多轮开发;介入时机和周期注入量是敏感因素,注水速度和采液速度是不敏感因素;介入时机为含水率越低越好,周期注入量扩大系数大于1,开发效果以第1轮动态注采耦合最为关键。The injection-production coupling technologies are an effective method proposed in recent years to enhance oil recovery of the water flooding,of which the dynamic injection-production coupling is the simplest and most common one.At present,there is no clear definition of and targeted systematic research on it.In light of the development characteristics and types of injection-production coupling,this paper clarifies its technical characteristics and proposes its definition,which deepens the understanding of the mechanism underlying the dynamic injection-production coupling to enhance oil recovery.Taking the typical dynamic injection-production coupling unit in Shengli Oilfield as an example,the paper systematically analyzes development characteristics and the development applicabilities of dynamic injection-production coupling in complex fault-block reservoirs.On this basis,the sensitivity of the main controlling factors is evaluated,and the influence of process design parameters(such as intervention timing,water injection parameters of injection wells and production parameters of production wells)on the development effect is analyzed.As a result,the technical policy boundaries of dynamic injection-production coupling design are clarified.The results show that the dynamic injection-production coupling presents two methods:short injection followed by long production and intermittent injection after production.The former is suitable for multiple rounds of development,while the latter is not.The intervention timing and periodic injection volume are sensitive factors,while water injection rate and fluid production rate are insensitive factors.The intervention timing is better when the water cut is lower,and the expansion coefficient of periodic injection volume is greater than 1.The development effect of the first round of dynamic injection-production coupling is the most critical.

关 键 词：动态注采耦合 断块油藏 提高采收率 技术政策界限 介入时机 

分 类 号：TE347[石油与天然气工程—油气田开发工程]