张垒垒,徐启,史连杰,王克亮
ZHANG Leilei,XU Qi,SHI Lianjie,WANG Keliang

• 1:东北石油大学提高油气采收率教育部重点实验室
• 2:大庆油田有限责任公司第十采油厂

摘要(Abstract)：

调驱技术是提高低渗透油藏采收率的有效方法,成功的关键在于分析油水界面关系和确定注入方式。界面张力和封堵率实验表明:在45℃条件下,质量分数为0.8%的SJT-B溶胶,30 d内体系平衡界面张力稳定在5.86×10~(-3)mN/m;岩心渗透率越低,封堵率越高。以优选的注入方式进行三管并联调驱实验,发现在低渗透非均质岩心中,SJT-B溶胶主要进入了高渗透层,中渗透层的吸液量显著增加,低渗透层吸液量小幅度增加。SJT-B溶胶对注水开发后期的低渗透油藏调驱效果良好。
Adjusting and flooding technique is an effective way to enhance the oil recovery of low-permeability reservoirs,the key to succeed is to analyze the relation between the oil and water interfaces and make sure of the injecting pattern.The experiments of the interfacial tension and plugging rate show that under the temperature of45℃,the system-balancing interfacial tension can be stablized by 5.86×10~(-3) mN/m for a month for SJT-B collosol with 0.8%mass fraction;the lower the core permeability is,the higher the plugging rate.The three-tube parallel profile-controlling and flooding experiment with the help of the optimized injecting pattern finds out in the lowpermeability heterogeneous core,the sol is mainly penetrated into the reservoirs with high permeability,and the absorbed liquid rate(fluid uptake) in the medium-permeability reservoirs is greatly increased,and moreover the rate of the low-permeability ones is still enhanced on a small scale.SJT-B collosol is characterized by much better profile-controlling and flooding effects for the low-permeability oil reservoirs at the late stage of water-flooding development.

关键词(KeyWords)： 调驱;溶胶;界面张力;渗透率;封堵率;调剖;采收率
adjusting/controlling and flooding;colloidal sol/collosol;interfacial tension;permeability;plugging rate;profile control;recovery

Abstract:

Keywords:

基金项目(Foundation): 省高校科技创新团队“提高油气采收率原理与技术”(2009td08)

作者(Author): 张垒垒,徐启,史连杰,王克亮
ZHANG Leilei,XU Qi,SHI Lianjie,WANG Keliang

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