胜利油田致密砂岩油藏微观孔隙结构特征  

Micro Pore Structure Characteristics of Tight Sandstone Reservoirs in Shengli Oilfield

作　　者：殷艳玲[1] 孙志刚[1] 王军[1] 房会春[1] 张玉利[1] 刘桂阳[1] 

机构地区：[1]中国石化胜利油田分公司勘探开发研究院,山东东营257015

出　　处：《新疆石油地质》2015年第6期693-695,共3页Xinjiang Petroleum Geology

基　　金：中石化科研项目(P14145)

摘　　要：以胜利油田渗透率小于5 m D的致密砂岩油藏为研究对象,从"空气渗透率相近的致密储集层,注水开发难易程度存在差异"现象出发,以毛细管压力曲线分析为基础,通过孔隙结构的对比分析,研究并量化了致密砂岩油藏孔隙结构特征。研究表明,认识致密砂岩孔隙结构的关键是表征喉道的大小及分布,在喉道的认识上必须有"有效性"的概念,随渗透率的降低,大于1.0μm喉道所占比例急剧降低,小于或等于0.4μm喉道所占比例急剧增加,与大庆油田和长庆油田相比,胜利油田致密储集层的喉道细小且分布呈尖峰状,不利于油藏开发。This quantitative research of micro pore structure characteristics of the tight sandstone reservoirs is based on the reservoirs with permeability of less than 5 mD in Shengli oilfield, combined with the capillary pressure curve analysis and pore structure comparative anal- ysis, in view of the tight reservoirs with similar air permeability but existing different complexities in water flooding process. The study results show that the key of understanding the tight sandstone pore structures in Shengli oilfield is the characterization of pore throat size and distribution, and the effectiveness of the throat radius. With the permeability decreasing, the proportion of those throats greater than 1.0 μm in radius is declining rapidly, while that of throats less than or equal to 0.4μm is quickly increasing, which indicate that the throats of tight sandstone reservoirs in Shengli oilfield are too tiny and like to peak shape in distribution, compared to Daqing oilfield and Changqing oil-field, so such a case in Shengli oilfield will be unfavorable to reservoir development.

关 键 词：胜利油田 致密砂岩油藏 微观孔隙结构 空气渗透率 液体渗透率 主流孔喉 

分 类 号：TE112.23[石油与天然气工程—油气勘探]