摘要
春风油田新近系沙湾组油层的油水关系较为复杂,既存在正常的边底水,也存在油藏内部的水体,即在同一油藏内,高部位钻遇到水层,而低部位则为油层的油水倒置现象,影响了对油藏的整体认识与评价。经过分析认为,纵向上储集层的三层结构差异,平面上三角洲的水下分流河道与分流河道间之间的物性差异影响储集层的孔喉毛细管力变化,物性差的储层毛细管阻力大;另外本区稠油的原油密度较大降低了原油的充注动力;以上两方面的因素导致了本区油藏出现较为复杂的油水关系。
Oil-water relationship in Neogene Shawan formation of Chunfeng oilfield is relatively complex,with co- existence of normal edge-bottom water and water inside reservoir,which means that in the same reservoir,when high position drilling water layer,the lower parts presenting oil/water inversion phenomenon,which affects the overall understanding and reservoir evaluation.The analysis results indicate because of the reservoir differences in vertical plane,and property differences between the underwater distributary channel and distributary channel of delta,reservoir pore throat capillary force changes,namely the poorer physical properties,the bigger reservoir pore throat capillary force.In addition,the heavy crude oil density is larger,which reduces the original filling power.The above mentioned reasons lead to complex oil-water relationship in this area.
出处
《石油地质与工程》
CAS
2014年第2期70-72,148,共3页
Petroleum Geology and Engineering
基金
国家科技重大专项"准噶尔盆地碎屑岩层系大中型油气田形成规律与勘探方向"(2011ZX05002-002)
中国石油化工股份有限公司重大科技攻关项目"准西北地区超剥带成藏规律及勘探目标"(P12028)
关键词
春风油田
沙湾组
油水倒置
影响因素
储层非均质性
Chunfeng oilfield
Shawan formation
oil/ water inversion
Influencing factors
reservoir heterogeneity
作者简介
董臣强，高级工程师，博士，1970年生，2008年毕业于中国地质大学（北京）能源地质工程专业，长期从事石油地质研究工作。
