摘要
我国稠油储量可观,其中60%的是深层稠油,而主流的蒸汽吞吐等热采技术采收率不足20%;稠油资源开发潜力极大,积极探索新的开采方式以提高采收率是石油领域高质量发展的必然选择。本文着重阐述稠油化学复合冷采技术体系构建及其现场应用,为中深层稠油的新型绿色低成本接替技术发展提供有效方案。在分析稠油组分的基础上,细致剖析稠油结构致黏机理,包括化学降黏机理、降低启动压力梯度机理、提高驱油效果机理在内的提高采收率机理,以丰富理论认识。面向工程应用亟需,从水溶性降黏剂分子设计与合成、自组装调堵剂研发两方面出发,突破稠油绿色化学驱油体系。基于发展的稠油化学复合冷采技术,完成了3个稠油油田示范工程应用,在提高产油量、控制含水率方面取得了良好成效。进一步梳理了分子采油理论与技术、渗流理论与数值模拟技术等方面的后续发展要点,以为深层稠油的绿色高效开发接替技术研究、稠油化学复合冷采技术推广应用研究等提供启发和参考。
China has considerable heavy oil reserves,with 60%being deep heavy oil.However,the mainstream thermal recovery technologies,such as cyclic steam stimulation,have a recovery rate of less than 20%.The development potential of heavy oil resources is enormous,and actively exploring new development methods to improve the recovery rate is an inevitable choice for the high-quality development of the petroleum industry.This study focuses on the construction of a chemical compound flooding technology system for heavy oil and its field application,providing an effective solution for the development of green and low-cost sequential technologies for deep heavy oil.Based on the analysis of the components of heavy oil,this study elaborates on the structural viscous mechanism and the recovery improving mechanisms(i.e.,chemical viscosity reduction,starting pressure gradient reduction,and oil displacement efficiency improvement mechanisms),which enriches the theoretical understanding.In response to urgent need of engineering applications,this study breaks through the green chemical flooding system for heavy oil from two aspects:the design and synthesis of water-soluble viscosity reducers and the development of self-assembling plugging agents.The developed chemical compound flooding technology for heavy oil has been successfully applied in three demonstration projects,achieving good results in increasing oil production and controlling water cut.Furthermore,this study outlines the key points for the subsequent development of molecular oil recovery theory and technology,as well as percolation theory and numerical simulation technology,providing inspiration and reference for research on green and efficient development technologies for deep heavy oil and the promotion of chemical compound flooding technology for heavy oil.
作者
计秉玉
孟霖
束青林
方吉超
杨书
刘合
Ji Bingyu;Meng Lin;Shu Qinglin;Fang Jichao;Yang Shu;Liu He(SINOPEC Petroleum Exploration and Production Research Institute,Beijing 100083,China;SINOPEC Shengli Oilfield Company,Dongying 257015,Shandong,China;Research Institute of Petroleum Exploration and Development,Beijing 100083,China)
出处
《中国工程科学》
CSCD
北大核心
2024年第1期216-224,共9页
Strategic Study of CAE
基金
国家重点研发计划项目(2018YFA0702400)。
关键词
深层稠油
结构致黏机理
化学降黏机理
降黏剂
现场试验
deep heavy oil
structural viscous mechanism
chemical viscosity reduction mechanism
viscosity reducer
oilfield pilot test
