石油与天然气地质 ›› 2016, Vol. 37 ›› Issue (3): 291-303.doi: 10.11743/ogg20160301

• 油气地质 • 上一篇    下一篇

塔中地区西北部鹰山组成岩早期岩溶作用类型及其特征

张恒1,2,3, 蔡忠贤1,3, 漆立新4, 云露4   

  1. 1. 中国地质大学(武汉) 构造与油气资源教育部重点实验室, 湖北 武汉 430074;
    2. 美国德克萨斯大学奥斯汀分校 经济地质调查局, 德克萨斯 奥斯汀 78713-8924;
    3. 中国地质大学(武汉) 资源学院, 湖北 武汉 430074;
    4. 中国石化 西北油田分公司, 新疆 乌鲁木齐 830011
  • 收稿日期:2015-07-15 修回日期:2015-12-30 出版日期:2016-06-08 发布日期:2016-06-22
  • 通讯作者: 蔡忠贤(1963—),男,教授,碳酸盐岩沉积学、储层地质学和油藏描述。E-mail:zxcai@cug.edu.cn。 E-mail:zxcai@cug.edu.cn
  • 作者简介:张恒(1988—),男,博士研究生,碳酸盐岩储层地质。E-mail:cughzhang@163.com。
  • 基金资助:
    国家基础研究发展计划(973计划)项目(2012CB214804);教育部重点实验室开放基金项目(TPR-2014-19)。

Types and characteristics of eogenetic karst in the Yingshan Formation in northwestern Tazhong area,Tarim Basin

Zhang Heng1,2,3, Cai Zhongxian1,3, Qi Lixin4, Yun Lu4   

  1. 1. Key Laboratory of Tectonics and Petroleum Resources Ministry of Education, China University of Geosciences(Wuhan), Wuhan, Hubei 430074, China;
    2. Bureau of Economic Geology, University of Texas at Austin, Austin, Texas 78713-8924, U.S.A.;
    3. Faculty of Earth Resources, China University of Geosciences(Wuhan), Wuhan, Hubei 430074, China;
    4. Northwest Oilfield Company, SINOPEC, Urumqi, Xinjiang 830011, China
  • Received:2015-07-15 Revised:2015-12-30 Online:2016-06-08 Published:2016-06-22

摘要: 根据塔中构造演化历史,厘定了鹰山组沉积-暴露时期均处于早期成岩阶段。基于大量的成像测井、岩心、薄片和部分分析化验资料,以及二维、三维地震数据,结合阴极发光技术、电镜扫描技术和地震属性提取技术,将塔中西北部鹰山组成岩早期岩溶作用划分为混合水岩溶和大气淡水岩溶两种基本类型,并阐述了岩溶发育特征,建立了岩溶作用模式。研究结果表明:①混合水岩溶为一期组构选择性的溶蚀作用,集中发育于塔中北坡折带顺7井,储层受到海岸带高能相带的控制。②大气淡水岩溶为一期非组构选择性的溶蚀作用,平面分布极为普遍。岩溶储层以裂缝型和裂缝孔洞型为主,岩溶垂向结构发育不完整,且储层在岩溶古地貌上的分异特征不显著,与北西西向断裂密切相关,反映了低幅度地貌控制下的开放系统“裂隙-渗流”型岩溶作用模式。

关键词: 混合水岩溶, 大气淡水岩溶, 早期成岩阶段, 岩溶作用, 鹰山组, 塔中地区

Abstract: It is recognized that the Yingshan Formation was in eogenetic stage both in depositional and exposure period according to the tectonic evolution history in Tazhong area.Based on a large amount of image logging,cores,thin sections,geochemical data and 2D & 3D seismic data in combination with cathode luminescence,scanning electronic microscope and seismic attributes extraction,we identified two types of eogenetic karst in the Yingshan Fm.in northwestern Tazhong area,namely mixing water karst and meteoric karst,discussed their formation characteristics and built karstification models.The following results were obtained.①The mixing water karst was formed by fabric-selective dissolution and controlled by high-energy sedimentary facies in coastal regions and occurs mainly in Well Shun7 in northern slope break zone;②The meteoric karst was produced by non-fabric-selective dissolution,and is universal in areal distribution.Karst reservoirs are dominated by fractured reservoirs and fractured-vuggy reservoirs.The karst is incomplete in vertical architecture and the reservoirs are insignificant in differential characteristics in respect of paleogeomorphology and are controlled by the NWW-trending fault system.The karstification mode is “fissure-seepage” type in an open system under the control of low relief paleogeomorphology.

Key words: mixed water karst, meteoric karst, Eogenetic stage, karstification, Yingshan Formation, Tazhong area

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