AG  >> Vol. 5 No. 2 (April 2015)

    四川盆地中二叠统层序地层格架下岩相古地理特征
    Lithofacies Paleographic Characteristic of Middle Permian under Sequence Stratigraphic Framework in Sichuan Basin

  • 全文下载: PDF(2104KB) HTML   XML   PP.92-102   DOI: 10.12677/AG.2015.52013  
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作者:  

刘满仓,杨 威:中国石油勘探开发研究院廊坊分院,河北 廊坊;
郭 凯:中国石油天然气股份有限公司,北京;
胡明毅,胡忠贵:长江大学地球科学学院,湖北 武汉

关键词:
四川盆地中二叠统沉积相层序地层岩相古地理Sichuan Basin Middle Permian Sedimentary Facies Sequence Stratigraphy Lithofacies Paleographic

摘要:

随着对四川盆地碳酸盐岩储层的重视和大力勘探,中二叠统发育的滩相储层也构成了盆内有利的含气层位之一。本文根据岩心观察、野外剖面实测、镜下岩石薄片鉴定分析和其它测试资料,结合岩石学、古生物、沉积构造等沉积相标志的综合研究,认为研究区中二叠世主要发育浅水型碳酸盐岩台地沉积,细分为碳酸盐岩台地和台地前缘斜坡相及若干亚相和微相。以经典层序地层学理论为指导,通过以岩性–岩相转换界面为主的层序界面识别,确定中二叠统发育5个II型三级层序,每个层序划分出TST和HST两个沉积体系域。在沉积相和层序地层学分析的基础上,以各层序体系域作为编图单元和“单因素分析综合作图法”为技术方法,编制了各体系域的岩相古地理图并对其演化特征进行了分析。结合各相带储集物性特征,认为台缘滩和台内滩为最有利储集相带,尤以SQ2-HST和SQ4-HST沉积期形成的滩相颗粒灰岩经过白云石化作用改造后更具储集意义。

With the recognition and vigorous exploration of carbonate reservoirs in Sichuan Basin, bank facies reservoir developed in middle Permian Maokou and Qixia Formation also constitute beneficial layer of the basin where new gas source can be discovered. According to core observation, field profile measurement, microscopically rock thin section identification, and other testing data, combining the research of sedimentary facies signs such as petrology, paleontology, sedimentary structure, etc., the area develops sedimentary model as shallow-water carbonate platform in middle Permian, further classifies as the sedimentary facies of carbonate platform, platform margin slope and several subfacies and microfacies. We apply Vail’s classical sequence stratigraphy theory as guidance and identify stratigraphic sequence boundaries as lithology-lithofacies convert interface, so determine that Middle Permian develops five Ⅱ-type third degree sequence, and each sequence is divided into two depositional system tracts as TST and HST. Base on sedimentary facies and sequence stratigraphy analysis, we take each sequence systems tract as the mapping unit and the “single-factor analysis and comprehensive mapping method” as the technical methods and compose lithofacies paleogeography map of each sequence system tract and describe its evolution character. Associated with reservoir physical property character of each phase belt, the platform edge shoals and inner platform shoals that are considered the most beneficial reservoir facies, especially shoal facies grain limestone in SQ2 HST and SQ4 HST which was dolomitisated has more reservoir significance.

文章引用:
刘满仓, 杨威, 郭凯, 胡明毅, 胡忠贵. 四川盆地中二叠统层序地层格架下岩相古地理特征[J]. 地球科学前沿, 2015, 5(2): 92-102. http://dx.doi.org/10.12677/AG.2015.52013

参考文献

[1] 马永生, 蔡勋育, 李国雄 (2005) 四川盆地普光大型气藏基本特征及成藏富集规律. 地质学报, 6, 858-865.
[2] 郑荣才, 张哨楠, 李德敏 (1996) 川东黄龙组角砾岩成因及其研究意义. 成都理工学院学报, 1, 8-18.
[3] 陈宗清 (2007) 四川盆地中二叠统茅口组天然气勘探. 中国石油勘探, 5, 1-11.
[4] 陈宗清 (2009) 四川盆地中二叠统栖霞组天然气勘探. 天然气地球科学, 3, 325-334.
[5] 戴弹申, 欧振洲 (1990) 裂缝圈闭及其勘探方法. 天然气工业, 4, 1-6.
[6] 赵文革, 陆正元, 向阳 (2006) 四川盆地下二叠统碳酸盐岩气藏储渗空间研究. 大庆石油地质与开发, 5, 9-11.
[7] 冯增昭, 杨玉卿, 金振奎, 何幼斌, 吴胜和, 辛文杰, 鲍志东, 谭健 (1996) 中国南方二叠纪岩相古地理. 沉积学报, 2, 1-11.
[8] 黄先平, 杨天泉, 张红梅 (2004) 四川盆地下二叠统沉积相及其勘探潜力区研究. 天然气工业, 1, 10-12.
[9] 冯仁蔚, 王兴志, 张 帆, 庞艳君 (2008) 川西南周公山及邻区下二叠统碳酸盐岩成岩作用对储集性的影响. 地质找矿论丛, 3, 223-229.
[10] 中国石油地质志编委会 (1991) 中国石油地质志——四川油气区. 石油工业出版社, 北京, 28-79.
[11] 覃建雄, 陈洪德, 田景春 (1998) 西南地区二叠系层序格架与烃源岩分布. 石油勘探与开发, 5, 21-25.
[12] 陈洪德, 田景春, 刘文均, 许效松, 郑荣才, 牟传龙, 李余生, 覃建雄 (2002) 中国南方海相震旦系–中三叠统层序划分与对比. 成都理工学院学报, 4, 355-379.
[13] 陈洪德, 覃建雄, 王成善, 寿建峰, 李祥辉 (1999) 中国南方二叠纪层序岩相古地理特征及演化. 沉积学报, 4, 510-521.
[14] 王成善, 陈洪德, 寿建峰, 等 (1998) 中国南方层序海相二叠系层序地层与油气勘探. 四川科学出版社, 四川.
[15] 冯增昭 (2004) 单因素分析多因素综合作图法——定量岩相古地理重建. 古地理学报, 1, 3-19.