稠油油藏CO_(2)与化学剂协同强化蒸汽驱机制  

Mechanisms of synergistic enhancement of steam flooding by CO_(2) and chemical agents in heavy oil reservoirs

作　　者：伦增珉[1] 王海涛[1] 张超[2,3] 李宾飞[2,3] 刘雅莉 李兆敏[2,3] LUN Zengmin;WANG Haitao;ZHANG Chao;LI Binfei;LIU Yali;LI Zhaomin(SINOPEC Petroleum Exploration&Production Research Institute,Beijing 100083,China;Key Laboratory of Unconventional Oil&Gas Development(China University of Petroleum(East China)),Ministry of Education,Qingdao 266580,China;School of Petroleum Engineering in China University of Petroleum(East China),Qingdao 266580,China)

机构地区：[1]中国石化石油勘探开发研究院,北京100083 [2]非常规油气开发教育部重点实验室(中国石油大学(华东)),山东青岛266580 [3]中国石油大学(华东)石油工程学院,山东青岛266580

出　　处：《中国石油大学学报（自然科学版）》2023年第6期72-79,共8页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家自然科学基金企业创新发展联合基金项目(U20B6003)。

摘　　要：为解决单一注蒸汽开发技术难以突破在稠油深部的携热运移问题,提出加入CO_(2)与化学剂协同辅助注蒸汽开发技术。该技术不仅可降低蒸汽无效散热,还能扩大蒸汽携热运移距离。同时,以CO_(2)辅助蒸汽热采并用于稠油开发的方式可有效捕获和封存CO_(2),有助于控制温室气体排放。结果表明:CO_(2)与化学剂注入后能够吸附在蒸汽冷凝介质表面形成隔热膜,阻碍蒸汽与传热介质间的热交换,“缓释”蒸汽热量,增加蒸汽携热运移距离,从而起到动用深部地层原油的目的;CO_(2)与化学剂协同作用下,蒸汽热损降低了5.48%,采收率提高了14.5%;研究结果可为气体与化学剂辅助蒸汽驱开发方式的优化提供理论指导。In order to solve the problem that steam injection alone is difficult for heat transport into the deep layers of heavy oil reservoir,a steam injection technique assisted by adding carbon dioxide(CO_(2))and chemical agents was pro-posed and investigated in this study.This technique can not only reduce the ineffective heat dissipation of steam,but al-so can expand the heat transport distance of steam.At the same time,CO_(2) can be effectively captured and sequestered in the heavy oil reservoir,which is beneficial for greenhouse gas emission reduction.The results show that CO_(2) and chemical agents can adsorb on the surface of steam condensing medium to form a heat insulation film,which can hinder the heat exchange between steam and heat transfer medium,slow down the heat release process,increase the heat trans-port distance of the steam,and thus mobilize the heavy oil from the deep formation.The experimental results show that the steam heat loss can be reduced by 5.48%with oil recovery rate increased by 14.5%under the synergistic effect of CO_(2) and chemical agents.The results can provide theoretical guidance for the optimization of the gas and chemical-as-sisted steam flooding technique.

关 键 词：蒸汽驱 稠油 二氧化碳 化学剂 深部携热 

分 类 号：TE355[石油与天然气工程—油气田开发工程]