考虑储集层参数时变效应的数值模拟方法与应用  

Numerical Simulation Method and Its Application when Considering Time-Dependent Effect of Reservoir Parameters

作　　者：金忠康[1] 方全堂[2] 王磊[1] 赵龙[3] 

机构地区：[1]中国石化江苏油田分公司勘探开发研究院,江苏扬州225009 [2]西南石油大学石油与天然气工程学院,成都610500 [3]中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依834000

出　　处：《新疆石油地质》2016年第3期342-345,共4页Xinjiang Petroleum Geology

摘　　要：受长期注入水的冲刷作用,注水开发油田的储集层物性及渗流特征参数发生较大变化,从而引起岩石相对渗透率变化范围加大,变化后的相对渗透率曲线形态更为复杂。常规数值模拟软件未能考虑储集层物性和相对渗透率参数的变化,导致模拟结果与实际情况不完全符合。通过建立苏北盆地东部低渗透油藏沙20断块的渗流机理模型,评价了长期注水开发过程中油藏典型特征参数的变化规律,实现对储集层物性和相对渗透率参数时变数值模拟方法的表征。结果表明,针对中低渗透油藏,长期注水冲刷作用导致储集层物性变差,平均剩余油饱和度计算值有所增大,尤其是在注水井附近,但考虑时变效应前后剩余油分布模式基本一致。Due to the influence of long-term scouring of injected-water, the physical properties and characteristic percolation parameters of reservoirs tend to change greatly in water-injection oilfields, which will result in large variations of relative permeability of rocks and morecomplexity of relative permeability curves after the changes. Conventional numerical modeling software never considers the variations ofphysical properties and relative permeabilities of reservoirs, so that the modeling results can＇t match with the actual situation completely.A percolation mechanism model has been established for low-permeability Sha-20 fault block in eastern Subei basin to evaluate the chang-es of typical characteristic reservoir parameters during long-term water injection, by which the characterization of time-dependent numeri-cal simulation method can be realized for physical properties and relative permeability of reservoirs. The result shows that long-term scour-ing of injected water will result in poorer physical properties and enlargement of the calculated average remaining oil saturation regardingmedium and low permeability reservoirs, especially in the surroundings of injectors. But the remaining oil distribution patterns are basicallythe same before and after considering the time-depending effect.

关 键 词：注水开发 储集层 时变效应 数值模拟 剩余油分布 

分 类 号：TE311[石油与天然气工程—油气田开发工程]