| 塔中地区良里塔格组沉积微相及其对有利储层的控制 |
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| 引用本文： | 高达,林畅松,杨海军,左璠璠,蔡振忠,刘景彦,张丽娟,李虹.塔中地区良里塔格组沉积微相及其对有利储层的控制[J].地球科学,2013,38(4):819-831. |
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| 作者姓名： | 高达 林畅松 杨海军 左璠璠 蔡振忠 刘景彦 张丽娟 李虹 |
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| 作者单位： | 1.中国地质大学能源学院, 北京 100083 |
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| 基金项目： | 国家重点基础研究发展计划"973"项目"中国西部叠合盆地深部有效碳酸盐岩储层形成机制与分布预测"，国家自然科学基金重点项目"塔里木盆地古生代古构造、古地理演变与成藏效应" |
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| 摘 要： | 良里塔格组作为塔里木盆地塔中地区重要的含油气层段引起广泛关注, 但沉积微相分析及其对有利储层控制研究尚且薄弱.研究利用大量岩心、薄片和测井资料, 开展了精细的微相分析、高精度的层序对比及其对有利储层的控制等研究.在良里塔格组碳酸盐岩台地内识别出9种沉积微相(Mf1-Mf9), 概括出台缘礁-滩型(MA1)、台缘-台内滩型(MA2)和台内环潮坪型(MA3)等3种微相组合, 在三级层序内以次级海泛面限定的四级层序中可发育一个或多个微相组合.在高精度层序与沉积微相对比的基础上建立了主要储层段即良里塔格组SQ2高位域的沉积微相模式, 重点揭示了台地边缘各微相发育分布的差异.高能微相是良里塔格组有利储层的物质基础, 易受准同生大气淡水溶蚀且更易产生裂缝从而形成优质储渗体, 低能微相在构造裂缝、埋藏岩溶和(或)表生岩溶叠加改造后也能成为有利储层.
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| 关 键 词： | 沉积微相 微相组合 高精度层序 有利储层 塔里木盆地 地层学 |
| 收稿时间： | 2013-01-28 |
Microfacies of Late Ordovician Lianglitage Formation and Their Control on Favorable Reservoir in Tazhong Area |
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| GAO Da,LIN Chang-song,YANG Hai-jun,ZUO Fan-fan,CAI Zhen-zhong,LIU Jing-yan,ZHANG Li-juan,LI Hong.Microfacies of Late Ordovician Lianglitage Formation and Their Control on Favorable Reservoir in Tazhong Area[J].Earth Science-Journal of China University of Geosciences,2013,38(4):819-831. |
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| Authors: | GAO Da LIN Chang-song YANG Hai-jun ZUO Fan-fan CAI Zhen-zhong LIU Jing-yan ZHANG Li-juan LI Hong |
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| Institution: | 1.School of Energy Resources, China University of Geosciences, Beijing 100083, China 2.School of Ocean Sciences, China University of Geosciences, Beijing 100083, China 3.Research Institute of Petroleum Exploration and Production, Tarim Oilfield Company, PetroChina, Korla 841000, China |
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| Abstract: | The Lianglitage Formation has been of great scientific interest for being the main reservoir for oil and gas in Tazhong area, Tarim basin. However, researches on depositional microfacies and their controls on reservoir quality are inadequate. Based on cores, thin-sections and well-logging data, detailed microfacies analysis, high-resolution sequences and controlling factors on favorable reservoir are studied in this paper. 9 microfacies (Mf1-Mf9) are recognized in carbonate platform and 3 microfacies associations(MA1-MA3) are established, which are interpreted as platform margin reef and sand bank, platform margin-interior sand bank, and platform interior peri-tidal types respectively. One or more microfacies associations can be developed within a fourth order sequence which is constrained by subordinated flood surface. Depositional model for HST of SQ2 is constructed, based on high-resolution sequences and microfacies analysis and their correlation between wells. The high energy microfacies are the primitive material for favorable reservoir, because they might have been more probably to be dissolved by meteoric water during penecontemporaneous diagenetic progress, and also more easily to be fractured. The reservoir quality of low energy microfacies could have been improved if tectonic fractures, burial dissolution and/or karstification developed. |
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| Keywords: | depositional microfacies microfacies association high-resolution sequence favorable reservoir Tarim basin stratigraphy |
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