夹层抑制砂岩油藏底水锥进影响因素分析  

The Influencing Factors Analysis on Interlayer Controlling Bottom Water Coning in Sandstone Reservoirs

作　　者：郑海妮[1] 李雪[1] 李根[1] 朱猛[1] 

机构地区：[1]中国石化西北油田分公司,新疆乌鲁木齐830011

出　　处：《新疆地质》2013年第B12期44-49,共6页Xinjiang Geology

摘　　要：夹层对底水锥进具很好的抑制作用,按夹层对开发的影响,对比河道砂体内部夹层特征,发现夹层垂向连通性对油藏产量具重要影响。在分析夹层与水锥关系基础上,结合塔河三叠系砂岩底水油藏的水平井实例,建立单井夹层模型。通过模拟夹层不同参数对底水锥进的影响,详尽分析夹层渗透率、规模及距井筒位置对底水锥进的影响。结果显示,位于油水界面之上且靠近水平井筒的致密夹层能有效延长无水采油期和提高油层采收率。可见,在开发过程中,精细刻画底水油藏中的夹层分布,据夹层特征合理射孔开采,针对夹层不发育或夹层无效井,借助人工夹层抵制底水锥进速度,提高了底水油藏采收率和开发效果。According to the influence of interlayer on reservoir development,it is obvious that interlayer can play a role in inhibiting bottom water coning and the vertical connectivity of interlayer has an important influence on reservoir pro-duction,by comparing layers inside the channel sand. This paper,based on analysis of the relationship between the inter-layer and water coning,as well as the instances of horizontal wells from the Triassic sandstone bottom water reservoir in Tahe oil field,models that the different interlayer parameters have different influence on bottom water coning,and has a detailed analysis of these effects-- interlayer vertical permeability,interlayer size and interlayer position from the wellbore on the bottom water coning.This study results show that the dense interlayer located above the oil-water inter-face and near the horizontal wellbore of horizontal wells can effectively extend the of anhydrous oil recovery period and improve reservoir recovery.In the process of oil exploitation,it is of great significance to pretty describe the interlayer dis-tribution in bottom water reservoirs,and right perforate to work by figuring out the interlayer characteristics,for guid-ing bottom water reservoir exploitation. If the interlayer is not developed or of no effect,it will be a good way to build an artificial interlayer to reasonably resist the water coning speed.

关 键 词：底水油藏 底水锥进 夹层 人工夹层 实验模拟 

分 类 号：P618.130.2[天文地球—矿床学]