大庆石油地质与开发2017，Vol.36Issue(3)：93-99,7.DOI:10.3969/J.ISSN.1000-3754.2017.03.018
大庆头台低渗透油藏液流转向剂筛选及其增油效果评价
SCREENING AND OIL INCREMENTAL EFFECTS OF THE FLUID DIVERTING AGENT FOR THE LOW-PERMEABILITY RESERVOIRS IN DAQING TOUTAI OILFIELD
摘要
Abstract
PI Formation oil layers in West Block Yuan-13 of Daqing Toutai Oilfield are low permeability reservoirs,and at present they are in the high-watercut development stage.In order to further enlarge the swept volume in the middle and low permeability layers by means of deep fluid diverting stimulation,taking the target reservoirs and fluids as the stimulated objects and the resistance coefficient,residual resistance coefficient and recovery as the evaluated indexes,the screening and oil incremental experimental effects of the deep fluid diverting agent were researched.The achievements show that the relative molecular mass of the corresponding polymer with the target reservoir should be less than 800× 104,the mass concentration of the polymer should be less than 900 mg/L,the mass concentration ρ (polymer):ρ (Cr3+) of the cross-linker ranges from (180-270 ）:1;under the same conditions of the relative molecular mass and concentration,comparing with the polymer solution,not only the resistance coefficient and residual resistance coefficient of Cr3+ polymer gel are larger,but also the residual resistance coefficient is greater than the resistance coefficient,and the gel shows wonderful fluid diverting and oil incremental effects;with the increase of the polymer gel slug size,the profile controlling and flooding recovery increase,but the growth decreases gradually,the suitable slug size is 0.1-0.15 PV.关键词
大庆头台油田/低渗透油藏/Cr3+聚合物凝胶/渗流特性/增油效果Key words
Daqing Toutai Oilfield/low-permeability oil reservoir/Cr3+ polymer gel/seepage characteristic/oil incremental effect分类
能源科技引用本文复制引用
张脊,宋欢,卢祥国,谢坤..大庆头台低渗透油藏液流转向剂筛选及其增油效果评价[J].大庆石油地质与开发,2017,36(3):93-99,7.基金项目
国家自然科学基金“抗盐型聚合物油藏适应性及其改进方法基础研究”(51574086). （51574086）
