高含水油田“二三结合”提高采收率评价理论模型研究  

Study on Theoretical Model of Secondary-tertiary Combination for EOR Evaluation in High Water-cut Oilfield

作　　者：赵平起[1] 张家良[1] 刘同敬 倪天禄[1] 喻洲 张津[1] 王强[1] ZHAO Pingqi;ZHANG Jialiang;LIU Tongjing;NI Tianlu;YU Zhou;ZHANG Jin;WANG Qiang(PetroChina Dagang Oilfield Company,Tianjin 300280,China;Petroleum Institute,China University of Petroleum-Beijing at Karamay,Karamay 834000,Xinjiang,China)

机构地区：[1]中国石油大港油田公司,天津300280 [2]中国石油大学(北京)克拉玛依校区石油学院,新疆克拉玛依834000

出　　处：《科技和产业》2023年第19期159-166,共8页Science Technology and Industry

基　　金：国家科技重大专项(2016ZX05058-003)。

摘　　要：“二三结合”是近年来国内高含水老油田在中低油价环境下首创的一种开发理念和开发模式,已进入工业化应用阶段。针对目前尚没有针对“二三结合”开发特点的提高采收率评价理论模型的情况,在综合分析国内外现有提高采收率评价方法的基础上,提出基于静态法构建“二三结合”提高采收率评价理论模型。依据国内油田“二三结合”的开发特点和开发实践,筛选出7项对“二三结合”采收率影响较大的关键相似准则及参数。基于“二三结合”作用机理和表征机制,从渗流力学和油藏工程角度出发,首次构建表征油藏属性、渗流特性、时变特性的“二三结合”提高采收率评价理论模型。考虑多层老油田的储层非均质性和油气水分布不均特性,引入全藏渗透率洛伦兹系数、全藏流度洛伦兹系数,实现“二三结合”提高采收率评价理论模型的修正。以大港某油藏实际开发动态参数和五点井网为例,给出“二三结合”提高采收率评价理论模型中系数的求解方法,得到“二三结合”提高采收率预测曲线,通过与数值模拟结果对比表明模型具有较好的可靠性和较强的适用性,为评价和预测“二三结合”开发效果以及老油田经济有效开发提供了科学依据与技术支撑。Secondary-tertiary combination was a new development concept and mode in recent years for China’s high-water-cut old oilfields under the environment of medium and low oil prices,which has entered the stage of industrial application.In view of the absence of EOR evaluation theoretical model for the development characteristics of“secondary-tertiary combination”,based on the comprehensive analysis of the existing EOR evaluation methods at home and abroad,proposed to construct the EOR evaluation theoretical model based on the static method.According to the development characteristics and practice of secondary-tertiary combination in domestic oilfields,seven key similarity criteria and parameters which have great influence on the recovery rate of secondary-tertiary combination were selected.Based on the action mechanism and characterization mechanism of secondary-tertiary combination,the theoretical model of secondary-tertiary combination for EOR evaluation was established to characterize reservoir properties,percolation characteristics and time-varying characteristics from the perspectives of percolation mechanics and reservoir engineering.Considering the heterogeneity of reservoir and the uneven distribution of oil,gas and water in multilayer heterogeneous developed reservoirs,introduced the whole reservoir permeability Lorentz coefficient and the whole reservoir fluidity Lorentz coe-fficient to modify the theoretical model of secondary-tertiary combination for EOR evaluation.Taking the actual development dynamic parameters and five-point well network of a reservoir in Dagang oilfields as an example,the calculation method of the coefficient in the theory model of secondary-tertiary combination for EOR evaluation was presented,and the enhanced oil recovery prediction curves of secondary-tertiary combination were obtained.It showed that the model had better reliability and applicability by the comparison results with numerical simulation.It provided scientific basis and technical support for the evaluation and p

关 键 词：二三结合 提高采收率(EOR) 评价方法 时变特性 理论模型 

分 类 号：TE343[石油与天然气工程—油气田开发工程]