喇嘛甸二类油层微观剩余油分布特征研究  

Study on Distribution Characteristics of Residual Oil in Lamadian Second-class Oil Reservoirs

作　　者：曹广胜[1] 郭达 裴秀玲[2] 梁红革[3] 杨婷媛 王大業 CAO Guang-sheng;GUO Da;PEI Xiu-ling;LIANG Hong-ge;YANG Ting-yuan;WANG Da-ye(Key Laboratory of Enhanced Oil&Gas Recovery of Ministry of Education,Northeast Petroleum University,Daqing 163318,China;Geological Brigade of No.6 Oil Production Plant of Daqing Oil Field Co.,Ltd.,Daqing 163114,China;No.4 Oil Mine of No.6 Oil Production Plant of Daqing Oil Field Co.,Ltd.,Daqing 163114,China)

机构地区：[1]东北石油大学提高油气采收率教育部重点实验室,大庆163318 [2]大庆油田有限责任公司第六采油厂地质大队,大庆163114 [3]大庆油田有限责任公司第六采油厂第四油矿,大庆163114

出　　处：《当代化工》2021年第7期1597-1602,共6页Contemporary Chemical Industry

基　　金：国家自然科学基金项目,活性原油在非均质储层中的自适应控水增油机理(项目编号:51574089)。

摘　　要：随着喇嘛甸油田的进一步开发,二类油层已经成为重要的挖潜对象。在二类油层的水驱、聚驱开发过程中,存在对储层的孔渗结构认识不足、注水无效循环、注聚见效不明显等问题,因此有必要对喇嘛甸二类油层开展微观剩余油室内实验研究。通过恒速压汞和扫描电镜研究了喇嘛甸油田二类油层的微观孔隙结构特征;并采用冷冻磨片荧光分析技术对天然岩心薄片进行现阶段、水驱后、聚驱后的微观剩余油的分布特征研究。结果表明:二类A油层水驱和聚合物驱之后膜状剩余油含量最高,喉道类型剩余油含量最低;二类B油层水驱后,簇状剩余油含量最高,喉道类型剩余油含量最低;聚驱后,膜状剩余油含量最高,喉道类型剩余油含量最低;二类A油层和二类B油层聚驱之后各类剩余油减少情况由大到小顺序为簇状、膜状、角隅状、喉道。With the further development of Lamadian oilfield,the second-class reservoirs have become important potential exploration objects.In the process of water flooding and polymer flooding,there are some problems,such as insufficient understanding of the pore and permeability structure of reservoirs,ineffective circulation of water injection,and unclear effect of polymer injection,and so on.In this paper,the microscopic pore structure characteristics of class II reservoirs in Lamadian oilfield were studied by means of constant velocity mercury injection and scanning electron microscopy.The distribution characteristics of the residual oil in the natural core flakes were studied by using the fluorescence analysis technique of the frozen grinding tablets at the present stage,after water flooding and after polymer flooding.The results showed that the film residual oil content was the highest after water flooding and polymer flooding,and the throat type had the lowest residual oil content.After water flooding in type B reservoir,the cluster residual oil content was the highest,and the throat type residual oil content was the lowest.After polymer flooding,the film residual oil content was the highest,and the throat type residual oil content was the lowest.The descending order of reduction rate of residual oil after the accumulation of type II A and type II B reservoirs was as follows:cluster,membrane,corner,throat.

关 键 词：喇嘛甸油田 二类油层 孔隙结构 微观剩余油 

分 类 号：TE38[石油与天然气工程—油气田开发工程]