干旱区生态环境知识资源中心(Arid): 准噶尔盆地南缘芦草沟组页岩的沉积过程及有机质富集机理

Arid

	准噶尔盆地南缘芦草沟组页岩的沉积过程及有机质富集机理
其他题名	Depositional Process and Mechanism of Organic Matter Accumulation of Lucaogou Shale in Southern Junggar Basin,Northwest China
	张逊 1; 庄新国 1; 涂其军 2; 徐仕琪 2; 张娅 1
来源期刊	地球科学
ISSN	1000-2383
出版年	2018
卷号	43 期号:2 页码:538-550
中文摘要	准噶尔盆地南缘二叠系芦草沟组页岩是重要的烃源岩和非常规油气资源储层,具有重大页岩油气勘探潜力.然而对准南芦草沟组页岩的沉积过程、古气候控制湖泊水文条件以及页岩中有机质的富集机理的研究相对较少.通过系统的野外地质调查和样品分析测试,主要利用沉积学定性分析和地球化学定量表征相结合的方法对芦草沟组页岩进行了综合研究.结果表明,研究区芦草沟组页岩主要沉积于盐度分层的半深湖-深湖环境;古气候在研究区湖盆流域具有独特的分带性,博格达东北部的古气候较温暖和潮湿,而博格达以西的古气候则相对干旱;博格达东北部较湿润的古气候引起该地区较充足的降雨,促进了湖水的盐度分层,同时降雨促进河流携带大量富营养元素的淡水注入湖泊引起了表层水体生产力升高,导致博格达东北部芦草沟组页岩相对于博格达西部地区具有更高的TOC含量;表层水体的古生产力与较稳定的贫氧-厌氧环境是研究区芦草沟组页岩有机质富集的主控因素.
英文摘要	The lacustrine shale succession of the Permian Lucaogou Formation in southern Junggar basin,Northwest China,is the most important hydrocarbon source rock and an unconventional reservoir.However,there are relatively few studies on the deposition process of Lucaogou shale,the hydrologic conditions controlled by the paleoclimate,and the enrichment mechanism of organic matter in the shale.In this study,the Lucaogou shale was studied comprehensively,based on the results of its sedimentological and geochemical test data.Results show that the Lucaogou shale was deposited in a semi-deep to deep stratified lake,which has anoxic,highly saline bottom and oxic,less saline surface water.The lake catchment of the study area has climatic zonality,which presents as that the paleoclimate in the lake catchment of northeastern Bogda was warm and humid and the paleoclimate in the lake catchment of western Bogda was arid.Elevated precipitation in humid climate provides fresh water rich in nutrients to lake caused relatively high paleoproductivity and promotes lake stratification,which led to relatively high TOC in the Lucaogou shale of northeastern Bogda.Organic matter accumulation in the Lucaogou shale was influenced by surface water primary productivity and preservation in stable anoxic bottom water.
中文关键词	准噶尔盆地 ; 芦草沟组 ; 页岩 ; 古气候 ; 有机质 ; 石油地质
英文关键词	Junggar basin Lucaogou Formation shale paleoclimate organic matter petroleum geology
语种	中文
国家	中国
收录类别	CSCD
WOS类目	MINERALOGY
WOS研究方向	Mineralogy
CSCD记录号	CSCD:6192215
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/237441
作者单位	1.(武汉)中国地质大学, 构造与油气资源教育部重点实验室, 武汉, 湖北 430074, 中国; 2.新疆维吾尔自治区地质调查院, 乌鲁木齐, 新疆 830000, 中国
推荐引用方式 GB/T 7714	张逊,庄新国,涂其军,等. 准噶尔盆地南缘芦草沟组页岩的沉积过程及有机质富集机理[J],2018,43(2):538-550.
APA	张逊,庄新国,涂其军,徐仕琪,&张娅.(2018).准噶尔盆地南缘芦草沟组页岩的沉积过程及有机质富集机理.地球科学,43(2),538-550.
MLA	张逊,et al."准噶尔盆地南缘芦草沟组页岩的沉积过程及有机质富集机理".地球科学 43.2(2018):538-550.