摘要
席状砂储层具有层薄和分布面积大等特点,由于形成条件的差异,不同位置、不同规模的席状砂内部具有不同的微观孔隙结构。微观孔隙结构的不同,致使注水开发油田中水驱波及区域内尚残留着大量的剩余油,且分布极为复杂。研究这部分油的存在位置、形态及其成因对油田的稳产具有重要意义。利用薄片、电镜和压汞等资料详细研究了杏南油田三角洲前缘席状砂储层的微观孔隙特征,将微观孔隙结构划分为5类。在此基础上,研究了前缘席状砂储层内不同孔隙结构类型中剩余油的形态及分布规律,确定了润湿性、微观孔隙结构、填隙物及油水粘度比是影响剩余油分布的主要因素。
The sheet sand reservoirs is characterized of thin and distributed widely.Because of different forming conditions,the microscopic pore structures in different position and various scale sand sheet are different.Differences of microscopic pore structures,result a large amount of remaining oil in watered sweep area in waterflooding oilfields with complex distribution.The analysis of the distribution,shape and cause of the remaining oil has important significance for stable production in oilfield.The microscopic pore character of delta front sand sheet of Xingnan Oilfield was researched through the data of thin section analysis,SEM(scanning electron microscope) and injection -Hg capillary pressure curve,and then the microscopic pore structure type was divided.And the shapes and distribution laws of the remaining oil in different microscopic pore structure was analyzed,then the influencing factors of the distribution of the remaining oil were discussed.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2009年第4期97-100,共4页
Petroleum Geology and Recovery Efficiency
基金
黑龙江省教育厅科学技术研究项目"水平井单砂体建筑结构及提高油气采收率研究"(11521010)
关键词
微观剩余油
前缘席状砂
孔隙结构
表面润湿性
填隙物
杏南油田
microscopic remaining oil
delta front sand sheet
pore structure
surface wettability
interstitial material
Xingnan Oilfield
