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南华北盆地尉参1井上古生界海陆交互相 页岩地球化学及其含气特征

作    者:曾秋楠1,2, 张交东2, 于炳松1, 刘旭锋2, 周新桂2
单    位:1 中国地质大学(北京); 2 中国地质调查局油气资源调查中心
基金项目:受国家科技重大专项“大型油气田和煤层气开发”子专题“南华北地区海陆交互相页岩气勘查评价应用试验”资助
摘    要:
为了明确南华北盆地太康隆起上古生界海陆交互相页岩含气性特征及资源潜力,以太康隆起西部页岩气参数井尉参1井的钻录井、岩心和测试分析等资料为基础,对泥页岩的发育特征、地球化学特征及含气性进行了研究。结果表明:太康隆起上古生界海陆交互相泥页岩较发育,累计厚度大;泥页岩有机碳含量高,二叠系太原组和山西组TOC平均值分别为1.46%、 1.01%;泥页岩有机质类型均为Ⅲ型,现场解吸气含量分别为0.172~5.478 m3/t和0.242~2.858 m3/t。并进一步探讨了埋藏深度、岩性特征及地球化学特征与含气性之间的关系,优选了优质烃源岩发育层段。
关键词:南华北盆地; 太康隆起; 上古生界; 海陆交互相; 页岩气; 地球化学

Geochemical characteristics and gas-bearing property of paralic transitional shale of the Upper Paleozoic in well Weican 1, Southern North China Basin

Author's Name: ZENG Qiunan, ZHANG Jiaodong, YU Bingsong, LIU Xufeng, ZHOU Xingui
Institution: China University of Geoscience(Beijing)
Abstract:
In order to determine the gas-bearing property and shale-gas resource potential of paralic transitional stratum of the Upper Paleozoic in Taikang Uplift, Southern North China Basin, the characteristics of the shale development, geochemistry and hydrocarbon content are studied based on the data of drilling, logging and test results of well Weican 1. The results show that the paralic transitional shale of Upper Paleozoic develop with large accumulative thickness. The TOC value of Permian Taiyuan Formation and Shanxi Formation is high with average value of 1.46% and 1.01% respectively, and the organic matter is mainly of type Ⅲ. The result of field analysis of core shows that the gas content is 0.172~5.478 m3/t and 0.242~2.858 m3/t respectively in these two formations. The relationship is further discussed between the gas-bearing property and such factors as burial depth, lithologic character and geochemical characteristics. The high quality source rocks are appointed out on the basis of comprehensive analysis.
Keywords: geochemical characteristics; paralic transitional shale; shale gas; Early Paleozoic; Taikang Uplift; Southern North China Basin
投稿时间:2018-11-05  
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