注采交替提高采收率物理模拟实验

Physical simulation experiment by alternation of injection and production to improve oil recovery

孙志刚 杨海博 杨勇 张红欣 陈霆 王建

中国石化胜利油田分公司勘探开发研究院，山东 东营 257015

Research Institute of Exploration and Development, Shengli Oilfield Company, SINOPEC, Dongying 257015, China

文中从水动力学角度出发，针对复杂断块油藏的储层特征开展了一系列物理模拟实验，对注采交替提高采收率机理进行了深入探讨。实验表明：对复杂断块油藏实施注采交替开发，可以实现特高含水期剩余油的有效动用，其机理为水动力作用下的压差交变、液流转向、扩大波及。与提液水驱实验结果对比，注采交替可以有效降低水油比，提高注水利用率，降低注水成本，减缓高渗层的水油比上升速度，提高中渗层的动用率。

Based on the hydrodynamics, a series of physical simulation experiments were carried out for the characteristics of complex fault-block reservoirs, and the mechanism of alternately increasing oil recovery by injection was deeply discussed in this paper. The experiment shows that the alternate development of complex fault-block reservoirs can realize efficient use of the remaining oil in ultra-high water cut stage. The mechanism is the alternation of pressure difference, flow direction and expansion of the hydrodynamic action. Compared with the experimental results of hydraulic lift, the injection-production alternation can effectively reduce water-oil ratio, improve water injection utilization rate and reduce water injection cost, slow down the rate of increase of water-oil ratio in high permeable layer, and improve the utilization rate of medium permeable layer.

10.6056/dkyqt201901020