两亲聚合物对非均质稠油油藏化学驱的适用性研究
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陈明贵(1982—),男,湖北十堰人,讲师,博士,从事油田化学工作液与提高采收率研究。联系电话:15926512943,E-mail: cmgswpi@126.com。

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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”(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”(51404039),湖北省大学生创新实验项目“油田用纳米微胶囊的研制” (104892014038)。


Research on feasibility of amphiphilic polymer for chemical flooding in heterogeneous heavy oil reservoir
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    摘要:

    为了高效开发海上油田高粘原油,研制对稠油油藏有更好增溶和乳化能力的两亲聚合物,应用岩心物理模拟方法评价两亲聚合物对非均质稠油油藏的注入性、流度控制能力和化学驱提高采收率效果。两亲聚合物在海上高渗透砂岩油藏中注入性好,质量浓度为1 000 mg/L的两亲聚合物的阻力系数为201,残余阻力系数为115,两亲聚合物的流度控制能力最好,总采收率最高;降粘聚合物界面活性高,流度控制能力差,在均质岩心中采收率达到90.13%,在非均质油藏中采收率仅为33.76%,驱替效果与普通聚合物基本一致。实验结果表明:一维均质岩心实验中的两亲聚合物适用于小段塞流度控制的调剖剂,恒压驱油实验中的两亲聚合物能减缓水驱产量递减趋势;3层非均质岩心驱替实验中分别累积注入3倍孔隙体积的普通聚合物和两亲聚合物,普通聚合物采收率为32.73%,而两 亲聚合物采收率为54.45%,具有较高流度控制和乳化作用的两亲聚合物在非均质稠油油藏化学驱中的应用潜力较大。

    Abstract:

    For efficient recovery of offshore heavy oil,amphiphilic polymer with better emulsification and solubilization behavior for heavy oil was developed. Core physical simulation method was applied to evaluation on injectivity,mobility control,recovery efficiency of the amphiphilic polymer. The amphiphilic polymer shows good injectivity in offshore high permeability sandstone reservoir,and the best mobility control and the highest recovery efficiency:1 000 mg/L of amphiphilic polymer solution has a resistance factor of 201 and a residual resistance factor of 115. Viscosity reduction polymer has better interfacial activity,poorer mobility control,and similar displacement effect as ordinary polymer,whose recovery efficiency is 90.13% in homogenous cores and only 33.76% in heterogeneous cores. Experiment results show that the amphiphilic polymer in one-dimension homogenous core experiment is suitable for the profile control agent controlled by small-slug mobility and that in constant-pressure oil displacement experiment may slow the trend of oil production decline with water flooding. Three times of pore volume of ordinary polymer and amphiphilic polymer were injected cumulatively in oil displacement experiment with three-layer heterogeneous cores and their recovery efficiencies were 32.73% and 54.45% respectively. The amphiphilic polymer with better mobility control and emulsification ability shows great potential in chemical flooding of the heterogeneous heavy oil reservoir.

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陈明贵,周智,杨光,吕行,夏晓婷.两亲聚合物对非均质稠油油藏化学驱的适用性研究[J].油气地质与采收率,2015,22(6):116~120

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  • 在线发布日期: 2015-11-12