深水浊积砂岩油藏滞留水发育特征及成因模式——以尼日尔三角洲盆地深水区E油田为例  

Characteristics and genetic models of perched water in deep-water turbidite reservoirs:a case study of E Oilfield in deep-water area of Niger Delta Basin

作　　者：张旭 段瑞凯 陈国宁 卜范青 康博韬 郜益华 ZHANG Xu;DUAN Ruikai;CHEN Guoning;BU Fanqing;KANG Botao;GAO Yihua(不详;CNOOC Research Institute)

机构地区：[1]中海石油(中国)有限公司北京研究中心 [2]中海油国际有限公司

出　　处：《海相油气地质》2022年第4期440-447,共8页Marine Origin Petroleum Geology

基　　金：国家科技重大专项所属课题“西非、亚太及南美典型油气田开发关键技术研究”(编号:2011ZX05030-005)资助。

摘　　要：尼日尔三角洲盆地深水区E油田B油组为浊积水道与朵叶复合体沉积,静、动态资料综合分析显示B油组发育滞留水。综合地震、动态测试等资料,总结了B油藏滞留水发育特征:滞留水可导致油藏油水系统复杂化,同一油水系统内可出现不同的油水界面;MDT测压分析显示发育滞留水的油藏一般具有统一的油线;干扰测试等动态资料显示发育滞留水的油藏虽然油水界面有差异但具有整体连通性。进一步分析了B油组滞留水的成因,在此基础上延伸提出了5种油藏滞留水成因模式,并探讨了准确认识滞留水油藏模式对油气田勘探开发的意义。The B oil group of the E Oilfield in the deep-water area of the Niger Delta Basin is composed of turbidite channel and lobe complex.The comprehensive analysis of static and dynamic data shows that the B oil group develops perched water.Based on seismic data and dynamic test data,the characteristics of perched water in reservoir B are summarized:perched water can complicate the oil-water system of the reservoir,and different oil-water contact may develop in the same oil-water system;MDT pressure analysis shows that reservoirs with perched water are generally with a unified oil pressure line;static reservoir development analysis and dynamic data such as interference tests show that,even though the same reservoir has different oil-water contacts,it has overall connectivity.The cause of the perched water is furtherly analyzed for the B oil group,and its genesis needs specific geologic basis and is highly related to the oil and gas charging process during the formation of the oil reservoir.Specifically,from the actual situation of the development of perched water in the B oil group,the geological basis for its genesis is the saddle area with a relatively low structure which forms a half-closed local structural depression surrounded by the high points on two sides,and by parallel sealing faults on the other two.While the oil and gas are charged from the southwest flank of the trap,which is the only open direction for the trap.One-way charging leads to the gradual reduction of the water body.When the high points are filled with oil and gas,the reservoir comes from a bottom water reservoir to an edge water reservoir,the water body in the saddle cannot be driven out and perched water is formed.There are various genetic models for the development of perched water in reservoirs,and five genetic models are proposed based on the genesis and mechanism analysis.Finally,understanding the perched water reservoir patterns is very important for the exploration and development of oil and gas fields.Three aspects of risk and potentia

关 键 词：深水浊积砂岩 油藏 滞留水 成因模式 尼日尔三角洲 

分 类 号：TE122.3[石油与天然气工程—油气勘探]