干旱区生态环境知识资源中心(Arid): 吐哈盆地胜北洼陷七克台组浅水湖相细粒沉积岩岩相特征、成因模式及页岩油意义

Arid

	吐哈盆地胜北洼陷七克台组浅水湖相细粒沉积岩岩相特征、成因模式及页岩油意义
其他题名	Lithofacies characteristics and genetic model of shallow lacustrine fine-grained sediments and its geological significance for shale oil in the Qiketai Formation in the Shengbei subsag,Turpan-Hami basin
	李天军; 黄志龙; 张亦婷; 王瑞; 张华; 周在华
来源期刊	地质学报
ISSN	0001-5717
出版年	2021
卷号	95 期号:12 页码:3869-3884
中文摘要	本文通过岩芯观察、常规薄片、全岩X射线衍射分析和扫描电镜等技术手段,结合无机地球化学沉积环境指标,对胜北洼陷七克台组二段(J_2q~2)浅水湖相细粒岩的岩相特征和沉积环境等进行研究,建立浅水湖相细粒岩沉积成因模式,并分析了其页岩油/致密油储层意义。研究结果表明:研究区细粒沉积岩具有复杂的矿物成分和沉积组构,有机质含量变化较大。综合矿物组分、沉积构造、有机质特征等因素,将七克台组二段细粒岩划分了11种岩相类型,主要为多组分混杂岩相,每一类岩相具有多种沉积构造,包括块状、含颗粒非纹层状和纹层状等类型。其中以含有机质块状长英质细粒混积/沉积岩相、含有机质块状碳酸盐细粒混积/沉积岩相和含有机质块状黏土质细粒混积岩相为主,少量的富有机质纹层状碳酸盐细粒混积/沉积岩相和含颗粒非纹层状碳酸盐细粒混积/沉积岩相。在古气候偏干旱、古盐度高、水体相对较深、陆源碎屑供给弱的条件下,湖盆水体主要发生化学和生物化学作用,碳酸盐细粒沉积岩/混积岩相较发育。不同沉积环境的岩相在垂向上频繁叠置,交互出现,可总结为4种岩相组合类型,分别形成于浅水碳酸盐颗粒滩-湖湾相组合、湖湾-灰泥坪相组合、灰泥坪-砂泥坪相组合和混积滩坝-浅湖泥相组合。在细粒岩的岩相类型、特征、沉积环境及垂向演化序列研究的基础上,最终建立了七克台组二段浅水湖相细粒岩沉积模式。该套细粒岩具有中等偏高的生烃潜力,碳酸盐含量高的细粒岩发育碳酸盐晶间孔隙和微裂缝,且脆性矿物含量高而易于后期压裂改造,具备形成页岩油/致密油的有利条件,具有重要的勘探意义。
英文摘要	In this study,based on results of core observations,thin sections,X-ray diffraction and scanning electron microscopy(SEM),combined with inorganic geochemical indicators,the lithofacies characteristics and sedimentary environment of shallow lacustrine fine-grained rocks in the second Member of Qiketai Formation(J_2q~2)are studied.The sedimentary genetic model of shallow lacustrine fine-grained rocks was established,and the significance of shale oil/tight oil reservoirs is also analyzed.The results show that the fine-grained sedimentary rocks in the study area have complex mineral composition and sedimentary structure,and the content of organic matter varies greatly.Based on the mineral composition,sedimentary structure and organic matter characteristics,fine-grained rocks of J2q2 were divided into 11lithofacies types,which were mainly multi-components mixed lithofacies,each of which had a variety of sedimentary structures,including massive,granular and laminated types.Organic matter-bearing massive felsic finegrained mixed/sedimentary rock lithofacies,organic matter-bearing massive carbonate fine-grained mixed/ sedimentary rock lithofacies,and organic matter-bearing massive argillaceous fine-grained mixed/ sedimentary rock lithofacies prevail,with a small amount of organic matter-rich laminated carbonate finegrained mixed/sedimentary rock lithofacies and granular carbonate fine-grain mixed/sedimentary rock lithofacies. Under the conditions of arid paleoclimate,high paleosalinity,relatively deep water column and weak terrigenous clastic supply,chemical and biochemical changes in the water column of lacustrine basin caused development of carbonate fine-grained mixed/sedimentary rocks.The lithofacies in different sedimentary environments frequently overlap and alternate in vertical direction,which can be recognized as four types of lithofacies assemblages.They were formed in shallow carbonate granular beaches-lacustrine bays assemblages,lacustrine bays and lime mud flats assemblages,lime mud and sand-mud flat assemblages,mixed sedimentary beach bar and shallow lake mud assemblages,respectively.Finally,based on the research of the lithofacies types,characteristics,sedimentary environment and vertical evolution sequence of fine-grained rocks,the sedimentary model of the shallow lacustrine fine-grained rocks in the J2q2 was established.The fine-grained rocks have moderately high hydrocarbon generation potential,and the fine-grained rocks with high carbonate content develop carbonate intercrystalline pores and microfractures.Moreover,the fine-grained rocks are suitable for fracturing because of high brittle mineral content. They have favorable conditions for shale oil and tight oil accumulation,and are significant for exploration.
中文关键词	胜北洼陷 ; 细粒沉积岩 ; 岩相特征 ; 沉积环境 ; 页岩/致密油
英文关键词	Shengbei subsag fine-grained sedimentary rocks lithofacies characteristics sedimentary environment shale/tight oil
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Mineralogy
CSCD记录号	CSCD:7118505
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377588
作者单位	李天军, 中国石油大学(北京)地球科学学院;;中国石油西南油气田分公司勘探开发研究院, ;;, ;;成都, 北京;;四川 102249;;610500, 中国.; 黄志龙, 中国石油大学(北京)地球科学学院, 北京 102249, 中国.; 王瑞, 中国石油大学(北京)地球科学学院, 北京 102249, 中国.; 张亦婷, 中国石油吐哈油田分公司,勘探开发研究院, 哈密, 新疆 839009, 中国.; 张华, 中国石油吐哈油田分公司,勘探开发研究院, 哈密, 新疆 839009, 中国.; 周在华, 中国石油玉门油田勘探开发研究院, 酒泉, 甘肃 735000, 中国.
推荐引用方式 GB/T 7714	李天军,黄志龙,张亦婷,等. 吐哈盆地胜北洼陷七克台组浅水湖相细粒沉积岩岩相特征、成因模式及页岩油意义[J],2021,95(12):3869-3884.
APA	李天军,黄志龙,张亦婷,王瑞,张华,&周在华.(2021).吐哈盆地胜北洼陷七克台组浅水湖相细粒沉积岩岩相特征、成因模式及页岩油意义.地质学报,95(12),3869-3884.
MLA	李天军,et al."吐哈盆地胜北洼陷七克台组浅水湖相细粒沉积岩岩相特征、成因模式及页岩油意义".地质学报 95.12(2021):3869-3884.