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上扬子东南缘寒武系碳酸盐岩台缘滩的发现与油气地质意义——以贵州石阡—岑巩为例
作者姓名:贺永忠  陈厚国  谢 渊  赵 磊  朱 勋  易成兴  安亚运
作者单位:1. 贵州省地质调查院, 贵州 贵阳 550018; 2. 中国地质调查局成都地质调查中心, 四川 成都 610081
基金项目:中国地质调查“中上扬子海相含油气盆地油气地质综合调查项目(编号:1212010782003-02)”和贵州省地质矿产勘查开发局科研项目“贵州省湄潭—天柱地区震旦纪—寒武纪盆地沉积演化与油气生储盖层研究课题(编号:黔地矿科(2009)16号)”联合资助。
摘    要:采用地层剖面测量、区域调查、岩矿鉴定等工作方法,发现石阡-岑巩地区寒武纪黔东世晚期至芙蓉世时期为一套连续沉积的台地边缘滩相的颗粒及藻类碳酸盐岩;通过地层划分与对比、岩石地层格架的建立,再现了该区寒武纪时期台、坡、盆的沉积古地理格局,研究了从寒武纪黔东世晚期开始碳酸盐岩台地的建立、发展、衰亡的沉积发展演化过程;并通过台地边缘滩相碳酸盐岩物性分析,认为该套岩石具有一定粒间孔、晶间孔,且晶洞发育,是油气储集层最有利部位,从而为贵州东部乃至中国南方地区该相位隐伏区寻找油气资源提供新的信息与线索。

关 键 词:寒武纪    碳酸盐岩沉积环境、台缘滩    油气储层    贵州石阡-岑巩  
收稿时间:2014-12-15

Discovery of Cambrian Carbonate Platform Margin Shoal in the Southeastern Margin of Upper Yangtze Platform and Its Geological Significance—Example from Shiqian-Cengong Area of Guizhou Province
Authors:HE Yong-zhong  CHEN Hou-guo  XIE Yuan  ZHAO Lei  ZHU Xun  YI Cheng-xing  AN Ya-yun
Institution:1. Guizhou Geological Survey, Guiyang, Guizhou 550018, China; 2. Chengdu Center of Geological Survey, China Geological Survey, Chengdu, Sichuan 610081,China
Abstract:In the study area of Shiqian-Cengong, by using a set of methods including stratigraphic profile measuring, regional geological survey, and rock-mineral identification, we found the strata from late Qiandongian to Furongian of Cambrian were marked by a succession from oolite shoal carbonate rocks to algae carbonate rocks of platform margin. By means of stratigraphic division and correlation, the lithostratigraphic frameworks were established, the sedimentation paleogeographic patterns of platform, slope and basin were reproduced, and the evolution process of establishment, development and decline of carbonate platform started from late Qiandongian of Cambrian were studied. Through physical property analysis of carbonate rocks with a large number of intergranular pores, intercrystal pores and miarolitic cavities on the platform margin shoal, we found these carbonate rocks could be favorable oil and gas reservoir. These achievements would provide new information and clues for searching concealed oil and gas in platform margin shoal at Eastern Guizhou and even southern regions of China.
Keywords:Cambrian  carbonate sedimentary environment  platform margin shoal  oil and gas reservoir  Shiqian-Cengong of Guizhou province
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