渤海稠油油田早期注聚剖面返转规律及控制方法研究

发布时间：2018-06-03 03:23

本文选题：剖面返转 + 交替注入　；参考：《油田化学》2017年02期

【摘要】：为了提高海上非均质稠油油田聚合物驱效果,采用疏水缔合聚合物AP-P4(特性黏数1800 m L/g、疏水基含量0.8%),通过双管并联岩心物理模拟实验研究了渗透率级差、注聚浓度、注聚时机对渤海稠油油藏早期注聚剖面返转的影响规律,比较了交替注入聚合物的类型和浓度、交替次数对提高采收率效果的影响。研究结果表明:聚合物驱适用于早期注聚(含水率小于80%)、渗透率级差小(㩳6)的油层条件,聚合物良好的注入性和合适的流度控制作用对提高稠油聚合物驱采收率十分重要;弱凝胶体系和聚合物体系交替注入对高渗层伤害大,提高采收率效果差;在相同聚合物用量条件下,高浓度(2250 mg/L×0.15 PV)与低浓度聚合物体系(1750 mg/L×0.15 PV)交替注入2个轮次比单一段塞注聚(聚合物用量1200 mg/L·PV)提高采收率4.3%,渤海稠油油藏开展高浓度/低浓度聚合物体系交替注入可改善稠油聚合物驱效果。
[Abstract]:In order to improve the effect of polymer flooding in offshore heterogeneous heavy oil field, using hydrophobic associating polymer AP-P4 (characteristic viscosity 1800 m L/g, hydrophobic group content 0.8%), the effects of permeability differential, polymer concentration and injection time on the return of early polymer injection profile in Bohai thick oil reservoir are studied by the physical simulation experiment of double tube parallel core. The results show that polymer flooding is suitable for early polymer injection (water content is less than 80%), and the permeability gradation is small (? 6), and the good injection and appropriate flow control effect on the recovery of polymer flooding is very heavy. Under the condition of the same amount of polymer, high concentration (2250 mg/L x 0.15 PV) and low concentration polymer system (1750 mg/L x 0.15 PV) are injected into 2 cycles more than single slug (1200 mg/L. PV) increase the recovery rate 4.3% under the same polymer dosage condition. The high concentration / low concentration polymer system alternate injection in Bohai heavy oil reservoir can improve the effect of heavy oil polymer flooding.
【作者单位】：长江大学石油工程学院;海洋石油高效开发国家重点实验室;
【基金】：中海石油有限公司北京研究中心项目“早期注聚注入剖面返转规律及控制方法研究”(项目编号YXKY-2014-ZY-03) 国家自然青年科学基金“Gemini表面活性剂对原油-水界面性质的影响”(项目编号51404039);国家自然青年科学基金“基于温敏聚合物的水基钻井液恒流变特性研究”(项目编号51404040)
【分类号】：TE53

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