石油与天然气地质 ›› 2005, Vol. 26 ›› Issue (4): 518-523,529.doi: 10.11743/ogg20050420

• 论文 • 上一篇    下一篇

流花11-1油田礁灰岩油藏沉积-成岩演化模式

岳大力1, 吴胜和1, 林承焰2, 王庆如3, 衡立群3, 李燕4   

  1. 1. 中国石油大学资源与信息学院, 北京, 102249;
    2. 中国石油大学资源与信息学院, 山东东营, 257061;
    3. 中国海洋石油总公司南海东部研究院, 广东广州, 510240;
    4. 中国海洋石油总公司研究中心, 北京, 100027
  • 收稿日期:2005-07-19 出版日期:2005-08-25 发布日期:2012-01-16
  • 基金项目:

    中国海洋石油总公司重点科技攻关项目(SW-2001-002)

Sedimentary and diagenetic evolution pattern of reef limestone reservoirs in Liuhua 11-1 oilfield

Yue Dali1, Wu Shenghe1, Lin Chengyan2, Wang Qingru3, Heng Liqun3, Li Yan4   

  1. 1. China University of Petroleum, Beijing;
    2. China University of Petroleum, Dongying, Shandong;
    3. Research Institute of Eastern South China Sea, CNOOC, Guangzhou, Guangdong;
    4. Research Center of CNOOC, Beijing
  • Received:2005-07-19 Online:2005-08-25 Published:2012-01-16

PDF (PC)

573

被引次数

56

摘要：

南海流花11-1油田发育生物礁、生物滩两种沉积相类型,并可细分为珊瑚藻礁、珊瑚礁、珊瑚藻-珊瑚礁、有孔虫滩、生物碎屑滩及珊瑚藻屑-有孔虫滩6种沉积微相。岩心观察及薄片鉴定结果表明,生物礁体在海底成岩环境、大气淡水成岩环境及区域地下水-埋藏成岩环境中发生的成岩作用包括粘结、溶解、胶结、压实-压溶、重结晶、白云化及“白垩化”作用等。结合沉积相分析结果及成岩作用各个阶段对储集性能的影响,将礁灰岩油藏沉积-成岩演化过程划分为8个时期:iv期成礁、早期暴露-溶蚀、 期成礁、中期暴露-溶蚀、早期成藏、晚期溶蚀、晚期成藏及区域地下水溶蚀。这种特有的演化模式形成了垂向上的8层储层结构,即4个高孔渗段和4个中-低孔渗段间互沉积,4个中-低孔渗段A,B2,C及E段以胶结作用为主,岩性相对致密,隔夹层广泛发育;生物礁体暴露过程中,处于渗流环境的B1,B3及D段由于溶蚀作用形成高孔渗段,区域地下水进一步溶蚀和“漂洗”形成的高孔渗段F段为水层。

关键词: 演化模式, 生物礁, 储集层, 成岩作用, 沉积微相, 流花11-1油田

Abstract:

Two types of sedimentary facies(bioherm and organic bank) are developed in Liuhua 11-1 oilfield.They can be subdivided into 6 microfacies,including coralgal reef,coral reef,coralgal-coral reef,foraminiferal bank,bioclastic bank and coralgal debris-foraminiferal bank.Core observation and thin section analysis indicate that the diagenesis of reef complex in sea floor diagenetic environment,fresh water diagenetic environment and regional underground water-buried diagenetic environment include cohesion,dissolution,cementation,compaction-pressure solution,recrystallization,dolomitization and "chalkification",etc.Based on the results of sedimentary facies analysis and the effects of various stages of diagenesis on poroperm characteristics of reservoirs,the sedimentary-diagenetic evolution of reef limestone reservoirs are divided into 8 periods,i.e.the early reef formation,early exposure-dissolution,late reef formation,middle exposure-dissolution,early reservoiring,late dissolution,late reservoiring and regional groundwater dissolution periods.This unique evolution pattern constitutes vertically 8-layer reservoir architecture,including the alternating of 4 high porous and permeable layers and 4 medium-low porous and permeable layers.Cementation is considered a major diagenetic factor in the 4 medium-low porous and permeable layers,namely layers A,B2,C and E,which are relatively tight and have widely developed intercalations.The layers B1,B3 and D,being in percolation environment,have been turned into high porous and permeable layers through dissolution,while the high porous and permeable layer F formed by further dissolution of regional groundwater is an aquifer.

Key words: sedimentary microfacies, diagenesis, evolution pattern, reef, reservoir, Liuhua 11-1 oilfield

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