西南石油大学学报(自然科学版) ›› 2018, Vol. 40 ›› Issue (6): 35-46.DOI: 10.11885/j.issn.1674-5086.2017.07.27.01

• 地质勘探 • 上一篇    下一篇

西非深水浊积复合水道储层连通模式表征

陈筱, 卜范青, 王昊, 陈国宁, 张旭   

  1. 中海油研究总院有限责任公司, 北京 朝阳 100028
  • 收稿日期:2017-07-27 出版日期:2018-12-01 发布日期:2018-12-01
  • 通讯作者: 陈筱,E-mail:chenxiao6@cnooc.com.cn
  • 作者简介:陈筱,1987年生,女,汉族,湖北武汉人,工程师,主要从事海上油气田开发地质、油藏描述方面的研究工作。E-mail:chenxiao6@cnooc.com.cn;卜范青,1981年生,男,汉族,山东潍坊人,高级工程师,主要从事开发地质、地质建模方面的研究工作。E-mail:bufq@cnooc.com.cn;王昊,1988年生,男,汉族,黑龙江大庆人,工程师,主要从事深水沉积相、储层预测等方面的研究工作。E-mail:wanghao6@cnooc.com.cn;陈国宁,1987年生,男,汉族,山东莱州人,硕士,主要从事海外油田开发地质研究。E-mail:chengn3@cnooc.com.cn;张旭,1988年生,男,汉族,山东菏泽人,工程师,硕士,主要从事油气田开发地质与油气藏描述方面的研究工作。E-mail:zhangxu19@cnooc.com.cn

Characterization of Connectivity Models of Deepwater Turbidite Compound Channels in West Africa

CHEN Xiao, BU Fanqing, WANG Hao, CHEN Guoning, ZHANG Xu   

  1. CNOOC Research Institute Co. Ltd., Chaoyang, Beijing 100028, China
  • Received:2017-07-27 Online:2018-12-01 Published:2018-12-01

摘要: 采用储层表征、构型刻画相结合的方法综合分析K油田A油组水道体系内部连通特征。基于岩芯、测井资料,分析深水浊积扇岩芯特征及测井响应特征;以单井相划分为基础,结合地震反演和平面属性特征,刻画浊积水道沉积相空间展布。采用井震结合的方法,分别从垂向、侧向对复合水道的空间几何关系进行剖析,归纳出4类15种构型样式,并总结出深水浊积复合水道构型演化规律。研究表明,深水浊积水道包含主水道、砂质天然堤两类亚相。主水道储层物性、均质性优于天然堤。复合水道在垂向上按照接触关系分为孤立式、叠加式、切叠式3类,在侧向上按照搭接程度可分为雁列孤立式、雁列叠加式和雁列切叠式,同时按摆动叠置关系可分为摆动孤立式、摆动叠加式和摆动切叠式。深水复合水道由近源至远源划分为5个区域,由近及远水动力强度经历了由弱增强再次减弱的过程;水道构型在近源以垂向孤立式为主,在中部随水动力增强,切叠、叠加样式增多,远源呈现摆动孤立式;由此水道连通性呈现从弱至强再减弱趋势。深水浊积复合水道具有多种构型样式,连通关系较为复杂,水道构型及连通性随水动力变化呈现规律性演化。

关键词: 深水浊积, 复合水道, 连通模式, 储层构型演化, 尼日尔三角洲

Abstract: The aim of this study was to comprehensively analyze the internal connectivity characteristics of the water channel systems of the A oil group in the K Oilfield using reservoir characterization and configuration descriptions. The deepwater turbidite fan sedimentary facies were described based on core and well log data. The lateral distribution of turbidite channel sedimentary facies were identified based on single-well phase and seismic plane attribute characteristics. With well log and seismic data, the spatial geometric relationships of the compound channels were analyzed, and consequently, 4 types and 15 configurations were classified in the A oil group. Finally, the evolution of the configuration deepwater turbidite compound channels were summarized. The resultes show that the deepwater turbidite channels were dominated by two sub-facies, inlcuding main channels and sandy levees. The physical properties and homogeneity of main channels are superior to the levees. Vertically, compound channels can be divided into three types, e.g., isolated, stacked and layered, while laterally, it can be divided into three types, including echelon isolated, echelon stacked, and echelon layered. In addition, the swaying stacking relationship can be summarized as swaying isolated, swaying stacked, and swaying layered. Deepwater compound channels are categorized into 5 sections with their increasing distance to the source, where hydrodynamic strength decreases after increases. The near-source channel configuration is dominated by vertical isolation, increasing hydrodynamic enhancement in the middle section resulted in stacking and layering, while swaying isolation presents at far-source section. The channel connectivity generally follows a trending of poor, good and poor again as a function of hydrodynamic forces and configuration. Deepwater turbidite compound channels are characterized by configuration patterns and complex connectivity. Channel configuration and connectivity vary regularly with hydrodynamic changes.

Key words: deepwater turbidites, compound channels, connectivity models, reservoir configuration evolution, Niger Delta

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