自组装颗粒调驱体系驱油实验研究

Study on Oil Displacement Experiment With Self-Assembled Particles System

海上油田注水开发中后期通常会形成高渗窜流通道,具有水驱效率低、水窜严重等特点,为此,本文借助室内实验,对一种新型自组装颗粒调驱技术进行了研究,所用自组装颗粒由刚性内核及粘性覆膜组成,其平均粒径为117.226μm。静态实验表明,自组装颗粒具有耐温100℃,耐盐35 000 mg/L的特性。驱油实验表明,对于渗透率级差为5(20 000/4 000×10^(-3)μm^2)的非均质砂管模型,在适宜的注入条件下,自组装颗粒的注入量为0.02 PV时,采出程度提高幅度为52.93%,提高采收率效果明显。该研究可为高渗油藏自组装颗粒调驱技术提供数据及理论基础。

Severely channeling-paths are usually formed in middle or late stages of water injection development in offshore oilfields, which can cause low displacement efficiency of water flooding. In this paper, a new type self-assembled particles profile control and displacement technology was studied, self-assembled particles were consisted of rigid kernel and viscous film, its average diameter was 117.226 μm. Static experiments showed that： self-assembled particles heat-resistant was up to 100 ℃, and salt-resistant was up to 35 000 mg/L. Oil displacement experiments showed that： for heterogeneous sand-filled pipe model with the permeability ratio of 5（20 000/4 000×10^（-3） μm^2）, 52.93% of OOIP was recovered by using 0.02 PV self-assembled particles under suitable injection conditions, its effect was obvious. The research can provide basis data and theoretical basis for self-assembled particles profile control in high permeability reservoirs.