摘要
油藏物性及采出程度对内源微生物采油技术实施效果存在显著影响,但该领域一直缺乏系统的室内研究,内源微生物驱油技术无科学的油藏筛选标准。基于胜利油区孤东51-511区块,利用室内物理模拟实验定量研究了渗透率、地面原油黏度、采出程度及非均质性级差对内源微生物驱油效果的影响。当渗透率为50~4000 mD时,提高采收率先增加后降低,当渗透率为500 mD时驱油效果最好,提高采收率达到6.6%;当地面原油黏度为35~5371 mPa·s时,随着地面原油黏度的增加,提高采收率先升高后降低,当地面原油黏度为1148 mPa·s时,提高采收率最高,达到8.8%;当采出程度为10%~50%时,随着采出程度的增加,提高采收率逐渐降低(由12%降低至2%);渗透率级差为2~20时,随着渗透率级差的增加,提高采收率逐渐降低(由7.3%降低至3.2%)。基于上述研究,建立内源微生物驱油技术油藏筛选标准,从油藏、生物及开发3大类指标明确关键参数的最佳适用范围,为内源微生物驱油技术油藏筛选提供科学的理论参考,指导现场实施。
Reservoir physical properties and recoveries have a significant impact on the implementation of the endogenous microbial oil displacement technology.However,systematic laboratory research has been lacking in this field,and this tech⁃nology has been in need of scientific screening criteria of reservoirs.On the basis of Gudong Block 51-511 in Shengli Oil⁃field,the effects of permeability,surface crude oil viscosity,recovery and heterogeneity on the oil displacement of endoge⁃nous microbes were quantitatively studied by physical simulations.When permeability is 50-4000 mD,the enhanced oil recovery first increases and then decreases.As permeability is 500 mD,the oil displacement effect is the best,and the en⁃hanced oil recovery reaches 6.6%.When the surface crude oil viscosity is within 35-5371 mPa·s,as the viscosity of crude oil grows,the enhanced oil recovery first rises and then declines.When the surface crude oil viscosity is 1148 mPa·s,the enhanced oil recovery is the highest,reaching 8.8%.When the recovery is 10%-50%,as it increases,the enhanced oil re⁃covery gradually drops(from 12%to 2%).When the permeability difference is 2-20,the enhanced oil recovery will decline over time(from 7.3%to 3.2%)as the permeability difference rises.Then the screening criteria of reservoirs with endoge⁃nous microbial oil displacement technology are established,and the optimal ranges of key parameters are defined from res⁃ervoir,biological,and development indicators.This paper can serve as scientific theoretical reference for reservoir screen⁃ing by endogenous microbial oil displacement and guide the field implementation.
作者
孙刚正
胡婧
刘涛
郭辽原
王小芳
吴晓玲
曹功泽
汪卫东
SUN Gangzheng;HU Jing;LIU Tao;GUO Liaoyuan;WANG Xiaofang;WU Xiaoling;CAO Gongze;WANG Weidong(Institute of Petroleum Engineering and Technology,Shengli Oilfield Company,SINOPEC,Dongying City,Shandong Province,257000,China;Hekou Oil Production Plant,Shengli Oilfield Company,SINOPEC,Dongying City,Shandong Province,257000,China)
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2021年第2期41-48,共8页
Petroleum Geology and Recovery Efficiency
基金
中国石化示范工程项目“微生物驱生化指标监测及其与驱油效率关系研究”(P18087-4)。
关键词
内源微生物
渗透率
黏度
采出程度
渗透率级差
endogenous microorganism
permeability
viscosity
recovery
permeability ratio