摘要
针对渤海油田储层渗透率高、水驱窜流严重的问题,采用新型自组装颗粒调驱体系,进行室内封堵以及驱油实验研究,并对颗粒注入方式进行对比。静态实验表明,自组装颗粒具有良好的耐温耐盐性能,耐温100℃,耐盐35 000mg/L;封堵实验表明,对于渗透率为10 000×10-3μm2左右的砂管模型,采用胍胶或聚合物溶液悬浮颗粒封堵后,砂管渗透率降至3 000×10-3μm2左右,砂管有效封堵率达70%;驱油实验表明,对于渗透率为20 000×10-3μm2和4 000×10-3μm2的并联砂管模型,在水驱采出程度为27.34%~28.17%的基础上,注入0.4PV自组装颗粒调驱体系,其采出程度可提高28.57%~38.76%,最终达55.91%~66.80%,且采用胍胶或聚合物悬浮颗粒的注入方式效果较好。实验揭示了自组装颗粒的封堵机理主要是填充封堵、架桥封堵、黏接封堵。
In view of high permeability and serious water channeling in Bohai oilfield, a new type self-assembled particles profile control system was investigated. Laboratory plugging and oil displacement experiments were carried out with different injection modes. Static experiments showed that self-assembled particles had good properties of heat-resistance and salt- resistance, and it was applicable on the reservoir conditions of 65 ℃ and 35 000 mg/L. Plugging experiments showed that for sand-filled pipe which permeability was about 10 000 × 10 -3μm^2 , after particles plugging with guanidine gum or polymer as suspension liquid, the permeability was dropped to about 3 000 × 10 -3μm^2 and effective plugging rate was above 70%. Oil displacement experiments showed that for parallel sand-filled pipes which permeability was about 20 000 × 10^-3 ,4 000 × 10^-3 μm^2, when water-flooding recovery was 27.34 %- 28.17 %, the degree of extraction can be improved by 28.57%- 38.76 % after injecting 0,4 PV self-assembled particles displacement system, and it can be up to 55.91 %-66.80 % finally. It should be noted the injection mode with guanidine gum or polymer was better. Mechanism analysis revealed self-assembled particles displacement system had plugging functions such as filling, bridging and adhesion.
出处
《石油化工高等学校学报》
CAS
2018年第1期49-56,共8页
Journal of Petrochemical Universities
基金
国家科技重大专项(2011ZX05009-004)
中国海油"智能释放自组装桥接颗粒封堵技术研究服务"(CCL2016TJTJLST0692)
关键词
自组装颗粒
调驱
砂管模型
封堵率
提高采收率
机理分析
Self-assembled particles
Conformance control
Sand pack
Plugging rate
Enhanced oil recovery
Mechanismanalysis
