干旱区生态环境知识资源中心(Arid): 柴北缘鱼卡地区大煤沟组七段页岩岩相特征及沉积演化模式

Arid

	柴北缘鱼卡地区大煤沟组七段页岩岩相特征及沉积演化模式
其他题名	Facies Characteristics and Sedimentary Evolution Model of the 7th Member of Dameigou Formation in Yuqia Area,North Qaidam Basin
	白楠; 徐尚; 王雨轩; 郭天旭; 石万忠
来源期刊	西北地质
ISSN	1009-6248
出版年	2021
卷号	54 期号:2 页码:1009-6248
中文摘要	近年来,中国陆相盆地页岩油成为油气勘探开发的热点和难点。笔者以柴达木盆地北缘鱼卡地区中侏罗统大煤沟组七段为研究对象,通过岩心、普通薄片观察、有机地化、X衍射等实验,研究了大煤沟组七段的岩相特征、沉积演化模式,为优质烃源岩的发育分布提供理论依据。研究结果表明,该段共发育6种岩相,垂向上可划分为3个沉积阶段。阶段A为温湿气候下的三角洲前缘、浅湖环境,发育贫有机质块状黏土质、硅质泥岩相,强陆源输入导致水体富氧,使该阶段页岩油气潜力较差,TOC平均为0.79%;阶段B为构造沉降作用下半深湖深湖环境,发育富有机质块状黏土质泥岩相,深湖还原环境为有机质提供了良好保存条件,使该阶段页岩油气潜力较高,TOC平均为4.16%;阶段C为干旱气候、构造沉降共同控制的半深湖深湖环境,发育富有机质纹层状钙质、富黏土钙质、黏土质泥岩相,湖水咸化分层提供了良好的有机质保存条件,适应性藻类勃发提供了高生产力,使该阶段页岩油气潜力最高,TOC平均为5.03%。
英文摘要	In recent years,shale oil incontinental basins of China has become a hotspot in oil and gas exploration and development.This paper studied the lithofacies characteristics and sedimentary evolution model of the 7th member of Dameigou formation of Middle JurassicinYuqia area,north Qaidam Basin by means of observation of core and thin section,organic geochemistry and X-ray diffraction experiments.It provided theoretical basis for the development and distribution of high-quality source rocks.The results show that there are six types of lithofacies,which can be divided into three sedimentary stagesin the vertical direction.Stage A is the delta front and shallow lake sedimentary environment under warm and humid climate,which develops massive poor-organicclay and siliceous mudstone facies.Strong terrestrial input leads to the oxygen-rich water bodywith an average TOCof 0.79%.Therefore,shale oil and gas potential is poor at this stag.Stage B is a semi-deep to deep lake sedimentary environment under tectonic subsidence,which develops the massive rich organic clay mudstone facies.The deep-lakereducing environment provides good condition for the preservation of organic matter.A higher potential of oil and gas appears with an average TOCof 4.16%.Stage C is a semi-deep to deep lake sedimentary environment jointly controlled by arid climate and tectonic subsidence,which develops the laminar calcareous organic-rich matter,calcareous clay-rich and clayey mudstone facies.Good preservation conditions of organic matter by lake salinity stratification and high productivity of adaptive alga make stage C the highest shale oil and gas potential with an average TOCof 5.03%.
中文关键词	页岩油 ; 有机质富集 ; 沉积演化模式 ; 大煤沟组七段 ; 柴达木盆地北缘
英文关键词	shale oil organic enrichment sedimentary evolution model the 7th member of Dameigou formation north of Qaidam basin
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Mineralogy
CSCD记录号	CSCD:6973968
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/365328
作者单位	白楠, 中国地质大学(武汉);;中国地质大学(武汉)资源学院, 构造与油气资源教育部重点实验室;;, 武汉;;武汉, 湖北;;湖北 430074;;430074, 中国.; 王雨轩, 中国地质大学(武汉);;中国地质大学(武汉)资源学院, 构造与油气资源教育部重点实验室;;, 武汉;;武汉, 湖北;;湖北 430074;;430074, 中国.; 石万忠, 中国地质大学(武汉);;中国地质大学(武汉)资源学院, 构造与油气资源教育部重点实验室;;, 武汉;;武汉, 湖北;;湖北 430074;;430074, 中国.; 徐尚, 中国石油大学(华东)地球科学与技术学院, 青岛, 山东 266580, 中国.; 郭天旭, 中国地质调查局油气资源调查中心, 北京 100083, 中国.
推荐引用方式 GB/T 7714	白楠,徐尚,王雨轩,等. 柴北缘鱼卡地区大煤沟组七段页岩岩相特征及沉积演化模式[J],2021,54(2):1009-6248.
APA	白楠,徐尚,王雨轩,郭天旭,&石万忠.(2021).柴北缘鱼卡地区大煤沟组七段页岩岩相特征及沉积演化模式.西北地质,54(2),1009-6248.
MLA	白楠,et al."柴北缘鱼卡地区大煤沟组七段页岩岩相特征及沉积演化模式".西北地质 54.2(2021):1009-6248.