河南海陆过渡相页岩储集特征及含气性初探  

Reservoir characteristics and gas-bearing potential of transitional-facies shale, Henan Province

作　　者：张木辰 冯辉 瓮纪昌 王鹍[1,4,2] 邱庆伦 刘艳杰[3,2] Zhang Muchen;Feng Hui;Weng Jichang;Wang Kun;Qiu Qinglun;Liu Yanjie(Henan Yukuang Geological Exploration and Investment Co., LTD, Zhengzhou, Henan 450012, China;Henan Geological Survey, Zhengzhou, Henan 450001, China;No.2 Geoexploration Party of Henan Bureau of Geoexplo- ration and Mineral Development, Zhengzhou, Henan 450046, China;Henan lndustry＆ Technology Innovation Strategy Alliance of Underground Clean Energy Exploration and Development, Zhengzhou, Henan 450000, China)

机构地区：[1]河南豫矿地质勘查投资有限公司 [2]地下清洁能源勘查开发产业技术创新战略联盟 [3]河南省地质调查院 [4]河南省地质矿产勘查开发局第二地质勘查院

出　　处：《天然气勘探与开发》2018年第2期37-46,54,共11页Natural Gas Exploration and Development

基　　金：河南省重大科技专项"河南页岩气勘查开发及示范应用研究"(编号:151100311000)

摘　　要：国内外页岩气勘查对象主要为海相页岩。2014—2017年,中国南华北盆地海陆过渡相页岩气勘查自牟页1井首次获气后又取得新进展。通过对牟页1井的氩离子抛光—扫描电镜、压汞、低温氮气吸附等测试结果进行分析,对海陆过渡相页岩的矿物组成、储集空间类型、孔隙结构、物性、有机地化等特征进行了探讨。结果表明:(1)储层矿物以黏土矿物和石英为主,具有低孔特低渗特征,物性受矿物组成和有机质影响明显;(2)储层具有高有机质丰度、高热演化程度特征,有机质类型以Ⅲ型干酪根为主,显微组分具有高惰质组特点;(3)牟页1井下二叠统山西、太原组页岩具有较高的含气量,与有机质丰度(TOC)及成熟度(Ro)均呈现正相关关系。结论认为:南华北地区乃至整个华北地区上古生界山西组、太原组具有良好的页岩气勘探开发潜力。Shale-gas prospecting around the world mainly focuses on marine shale. During 2014-2017, however since shale gas was produced, for the first time, from Mouye 1 well, new progress had been made in the transitional facies, southern North China Basin. In this study, some experimental results on this well were analyzed, including Argon ion polishing-scanning electron microscope, mercury injection, and low-temperature nitrogen adsorption. Then, the characteristics of transitional-facies shale were summarized, e.g. mineral composition, reservoir space type, pore structure, physical property, and geochemistry. Results show that（1） mainly composing of clay minerals and quartz, the reservoirs are characterized by low porosity and extra-low permeability, and these physical properties are affected obviously by mineral composition and organic matter;（2） they are high in organic matter abundance and thermal evolution degree, organic matters are mainly of Type Ⅲ kerogen, and the maceral presents the features of high inertinite; and（3） in Mouye 1 well, the gas content of both Lower Permian Shanxi and Taiyuan shales is higher and appears a positive correlation with organic-matter abundance（TOC） and maturity（Ro）. It is concluded that, in the Upper Paleozoic Shanxi and Taiyuan formations, southern North China and even the whole North China area, there are better prospects for shale-gas exploration and development.

关 键 词：海陆过渡相 早二叠世 页岩气 牟页1井 测试分析 储集特征 含气性 河南 

分 类 号：P618.13[天文地球—矿床学]