摘要
以新型微生物多糖为研究对象,选择胜利油田高温高盐稠油油藏条件为实验设计依据,基于Micro-CT扫描结果,利用QSGS技术设计了微观通道图案模型,利用湿法刻蚀技术结合表面修饰方法制作了实验用微流控模型。在高温高盐环境中进行微生物多糖微观驱替实验,获取各驱替阶段整体图像及微观机理,评价了高温高盐稠油油藏中微生物多糖体系微观驱油效果。研究结果表明,新型微生物多糖具有较好的耐温耐盐特性,在温度86℃、矿化度45939 mg/L的环境中具有优异的黏弹性能,与黄原胶相比性能大幅提升。微观条件下新型微生物多糖能够动用更多簇状剩余油,簇状剩余油被驱动的过程中逐渐向多孔剩余油转变,进一步形成滴状剩余油,水驱基础上注入0.5 PV黏度为95.6 mPa·s的新型微生物多糖溶液进一步提高采收率10.15个百分点,高出黄原胶3.08个百分点。新型微生物多糖作为一种纯生物制剂具有更好的耐温耐盐特性和驱油效果,可以为高温高盐油藏绿色高效开发提供一条可行的技术途径。
This paper focused on a novel microbial polysaccharide as the research subject,using the high-temperature and high-salinity conditions in Shengli oilfield as the basis for experimental design.Based on the Micro-CT scanning results,the micro-channel pattern model was designed by QSGS technology,and the experimental microfluidic model was made by wet etching technology combined with surface modification method.The microbial polysaccharide micro-displacement experiments were conducted in high-temperature and high-salinity environments,and the overall images and microscopic phenomena at various displacement stages were captured,thereby the micro-oil displacement effectiveness of the polysaccharide system in hightemperature and high-salinity heavy oil reservoirs was evaluated.The study demonstrated that the novel microbial polysaccharide exhibited excellent temperature and salt resistance,maintaining high viscoelastic properties under reservoir conditions of 86℃and salinity exceeding 45939 mg/L,which was significantly improved compared with xanthan gum and met the requirements for injection agents in high-temperature and high-salinity reservoirs.Under the microscopic conditions,the novel polysaccharide could mobilize more clustered residual oil,which gradually transformed into porous residual oil and further into droplet-like residual oil during the displacement process,enhancing the displacement efficiency by 10.15 percentage point when injecting 0.5 PV of new microbial polysaccharide solution with viscosity of 95.6 mPa·s based on water flooding,which was 3.08 percentage point higher than that of xanthan gum.As a pure biological agent,the novel microbial polysaccharide shows promising temperature and salt resistance along with effective performance,indicating its potential application in high-temperature and high-salinity reservoirs and providing a viable technical approach for enhancing oil recovery in such environments.
作者
刘涛
胡婧
宋永亭
岳胜辉
向易为
马梦琪
汪卫东
张本华
朱桂平
LIU Tao;HU Jing;SONG Yongting;YUE Shenghui;XIANG Yiwei;MA Mengqi;WANG Weidong;ZHANG Benhua;ZHU Guiping(Institute of Petroleum Engineering and Technology,Shengli Oilfield Company,Sinopec,Dongying,Shandong 257000,China;State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum,Beijing 102249,China;Shengli Oilfield Branch Company,Sinopec,Dongying,Shandong 257000,China;Xianhe Oil Production Plant,Shengli Oilfield Branch Company,Sinopec,Dongying,Shandong 257000,China)
出处
《油田化学》
北大核心
2026年第1期173-180,共8页
Oilfield Chemistry
基金
国家重点研发计划“油田采油生物制剂研发及应用”(项目编号2022YFC2105200)
中国石化新领域培育项目“采油用新型生物胶应用及食品级原材料探索研究”(项目编号P23029)
中国石化重点实验室项目“水驱稠油油藏剩余油微生物动用机理研究”(项目编号KLP23023)。
关键词
高温高盐稠油油藏
微生物多糖
微流控
驱替效果
微观机理
high temperature and high salinity reservoir
microbial polysaccharides
microfluidics
displacement effect
microdisplace⁃ment mechanism
