| 祁连山冻土区天然气水合物科学钻探试验井中侏罗统的沉积学特征 |
| |
| 引用本文： | 庞守吉,苏新,杨旭,王平康,李永红,郭星旺,李清海.祁连山冻土区天然气水合物科学钻探试验井中侏罗统的沉积学特征[J].地质通报,2011(12). |
| |
| 作者姓名： | 庞守吉 苏新 杨旭 王平康 李永红 郭星旺 李清海 |
| |
| 作者单位： | 中国地质大学海洋学院;中国地质科学院矿产资源研究所;青海煤炭地质105勘探队; |
| |
| 基金项目： | 中国地质调查局项目《青藏高原冻土带天然气水合物调查评价》(编号:1212010818055) |
| |
| 摘 要： | 对青海祁连山冻土区天然气水合物钻井(DK-3)岩心进行了沉积学分析。根据对钻井地层特征、粒度、矿物含量的综合分析,在DK-3钻井揭露的中侏罗统中识别出4种沉积相类型,并完成了沉积微相的划分。伴随地层由老到新,沉积环境由最初发育的辫状河过渡到相对稳定的湖泊(辫状河→湖泊→曲流河三角洲→湖泊)。在133~156m和225.1~240m井段的岩层中发现的天然气水合物,主要呈薄层状分布于岩石裂隙面上;而在367.7~396m井段,天然气水合物除存在于岩石裂隙中外,在砂岩孔隙中亦大量存在。天然气水合物的产出与沉积环境、构造条件有着密切的联系。
|
| 关 键 词： | 天然气水合物 冻土区 沉积环境 粒度 XRD 祁连山 |
Sedimentological features of Middle Jurassic strata revealed by scientific drilling boreholes of natural gas hydrate in Qilian Mountain permafrost |
| |
| PANG Shou-ji,SU Xin,YANG Xu,WANG Ping-kang,LI Yong-hong,GUO Xing-wang,LI Qing-hai.School of Ocean Sciences,China University of Geosciences,Beijing ,China.Sedimentological features of Middle Jurassic strata revealed by scientific drilling boreholes of natural gas hydrate in Qilian Mountain permafrost[J].Geologcal Bulletin OF China,2011(12). |
| |
| Authors: | PANG Shou-ji SU Xin YANG Xu WANG Ping-kang LI Yong-hong GUO Xing-wang LI Qing-haiSchool of Ocean Sciences China University of Geosciences Beijing China |
| |
| Institution: | PANG Shou-ji1,SU Xin1,YANG Xu1,WANG Ping-kang2,LI Yong-hong3,GUO Xing-wang2,LI Qing-hai31.School of Ocean Sciences,China University of Geosciences,Beijing 100083,China,2.Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing 100037,3.Qinghai No.105 Geological Exploration Party for Coal Resources,Xining 810007,Qinghai |
| |
| Abstract: | A sedimentological study of natural gas hydrate borehole DK-3 was carried out.All the core samples were collected from Qilian Mountain permafrost.Through a comprehensive analysis of stratigraphy,grain size and XRD of the samples,four types of Middle Jurassic sedimentary facies were recognized.With the variation of the strata from old to young,the sedimentary facies evolved gradually from braided river,meandering river,meandering river delta to lake facies,together with the changes of microfacies.The natural... |
| |
| Keywords: | natural gas hydrate permafrost sedimentary environment grain size XRD Qilian Mountain |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《地质通报》浏览原始摘要信息 |
| 点击此处可从《地质通报》下载免费的PDF全文 |
|
