摘要
为研究二甲醚(DME)在稠油油藏开发中的增产机理,揭示其在油水两相中的传质规律及对稠油的溶胀降黏效果,选取大港油田某区块稠油油样,开展高温高压条件下PVT和填砂管驱替实验。结果表明:DME是一种良好的稠油降黏剂,易溶解于水,更易溶解于原油,在油水两相中具有较强的扩散作用;水可作为载体将DME注入地下,并可通过添加乙醇或乙二醇来提高DME的携带量;对于黏度较低的稠油,可在水驱基础上开展DME水驱,增油效果显著,对于黏度较高无法形成有效驱替的稠油,可考虑采用水或CO_(2)作为载体进行DME吞吐。研究结果对DME在稠油开采中的应用具有重要指导意义。
In order to study the stimulation mechanism of dimethyl ether(DME)in the development of heavy oil reservoir,reveal its mass transfer law in both oil and water phases and its swelling and viscosity reduction effect on heavy oil,a heavy oil sample from a certain block in Dagang Oilfield was selected to carry out PVT and sand-packed tube displacement experiments under high temperature and high pressure conditions.The results show that DME is a good viscosity reducer for heavy oil,easily dissolved in water and more easily dissolved in crude oil,and has strong diffusion effect in both oil and water phases;the water can be used as a carrier to inject DME into the subsurface,and the carrying capacity of DME can be increased by adding ethanol or ethylene glycol;for heavy oil with low viscosity,the DME water flooding can be carried out on the basis of water flooding,with significant oil increase effect,while for heavy oil with high viscosity that cannot form effective drive For heavy oil with high viscosity that cannot form effective displacement,the water or CO_(2) can be considered as a carrier for DME huff-n-puff.The study results are of great significance for the application of DME in the production of heavy oil.
作者
张亮
魏虎超
张向峰
史振鹏
赵泽宗
王晓燕
章杨
杨红斌
Zhang Liang;Wei Huchao;Zhang Xiangfeng;Shi Zhenpeng;Zhao Zezong;Wang Xiaoyan;Zhang Yang;Yang Hongbin(China University of Petroleum(East China),Qingdao,Shandong 266580,China;Key Laboratory of Unconventional Oil and Gas Development,Ministry of Education,Qingdao,Shandong 266580,China;Sinopec Northwest Oilfield Company,Urumqi,Xinjiang 830011,China;Sinopec Shengli Oilfield Company,Dongying,Shandong 257000,China;Sinopec Engineering(Group)Co.,Ltd.,Beijing 100029,China;Sinopec Zhongyuan Oilfield Company,Puyang,Henan 457001,China;PetroChina Dagang Oilfield Company,Tianjin 300270,China)
出处
《特种油气藏》
CAS
CSCD
北大核心
2023年第3期97-105,共9页
Special Oil & Gas Reservoirs
基金
大港油田科技攻关项目“CO_(2)对原油高压物性影响测试及物模驱油试验分析”(DGYT-2019-CL-515)。
关键词
二甲醚
稠油
溶胀降黏
溶解扩散
分配系数
开采机理
提高采收率
DME
heavy oil
swelling and viscosity reduction
dissolution and diffusion
distribution coefficient
production mechanism
enhanced recovery
