摘要
纵向非均质油藏普遍存在层间矛盾突出,水驱采收率低,低渗储层难以动用的特点,油田在注水开发过程中,储层非均质性会导致层间干扰现象,严重影响水驱油效率及油田采收率,从而严重影响了油田的高效开发。针对以上问题,以SZ36—1油田为研究对象,开展了室内多层岩心水驱油实验,模拟该油藏分注合采、分注分采的现场开发模式,研究了多层组合下,不同渗透率层的水驱效果、油藏采收率的影响。研究结果表明,生产井层间干扰与倒灌的严重程度与注采压力有关,注采层系划分应综合考虑组合层数及渗透率级差等因素的共同影响。
The vertical heterogenous reservoir generally has the features of serious interlamination contradiction, low water displacement recovery and low permeable reservoirs which are difficult to be produced. In flooding process, the reservoir heterogeneity can lead to interference between layers, the water displacement recovery is affected seriously. Taking the SZ36-1 oilfield as a study object to carry out the indoor multilayer core water displacing oil experiment, simulated the field development methods of separated injection-commingled production and separated injection- separated production, studied the flooding effect and oil recovery on different permeable layers. The result shows that the interlayer interference and flow backward level are related with the injection-recovery pressure in production wells, the affect from the number of composite layer and the difference of permeability should be considered in the injection recovery layer series division.
出处
《油气地球物理》
2012年第2期17-19,共3页
Petroleum Geophysics
基金
国家科技重大专项项目(稠油砂岩油藏开发中后期剩余油分布规律研究)部分研究成果(编号:2008ZX05024-04-012)
关键词
纵向非均质性
采收率
分注合采
水驱油实验
vertical heterogeneity
recovery
separate injection-commingled production and water flooding oil experiment
