Diagenetic history of tight sandstones and gas entrapment in the Yulin Gas Field in the central area of the Ordos Basin, China

doi:10.1016/j.marpetgeo.2008.05.003

	Diagenetic history of tight sandstones and gas entrapment in the Yulin Gas Field in the central area of the Ordos Basin, China
	Zhang, Liuping 1; Bai, Guoping 2; Luo, Xiaorong 1; Ma, Xinhua 3; Chen, Mengjin 3; Wu, Minghui 1; Yang, Wenxiu 1
刊名	MARINE AND PETROLEUM GEOLOGY
	2009-06-01
卷号	26 期号:6 页码:974-989
关键词	Gas Entrapment Diagenesis Tight sandstones Seal
ISSN号	0264-8172
DOI	10.1016/j.marpetgeo.2008.05.003
文献子类	Article
英文摘要	The Ordos Basin is a large cratonic basin with an area of 250,000 km(2) in central China. Upper Paleozoic coals and shales serve as gas source rocks with peak generation and migration at the end of the early Cretaceous. Recent exploration has verified the huge gas potential in the "basin-centered gas accumulation system" (BCGAS). However, the mechanism for the gas accumulation is controversial. With an integrated approach of thin-section petrography, ultra-violet fluorescence microscopy, fluid inclusion microthermometry, Raman microspectrometry, scanning electron microscopy, and X-ray diffractometry, we identified diagenetic trapping and evaluated the diagenetic history of sandstone reservoirs in the Yulin Gas Field in the central area, where structural, stratigraphic and/or sedimentary lithologic traps have not been found. It was revealed that three phases of diagenesis and hydrocarbon charging occurred, respectively, in the late Triassic, late Jurassic and at the end of the early Cretaceous. In the first two phases, acidic water entered the reservoir and caused dissolution and cementation, resulting in porosity increase. However, further subsidence and diagenesis, including compaction and cementation, markedly reduced the pore space. At the end of the early Cretaceous, the bulk of the gas migrated into the tight reservoirs, and the BCGAS trap was formed. In the updip portion of this system, cementation continued to occur due to low gas saturation and has provided effective seals to retain gas for a longer period of time than water block in the BCGAS. The mechanism for the gas entrapment was changed from water block by capillary pressure in the BCGAS to diagenetic sealing. The diagenetic seals in the updip portion of the sand body were formed after gas charging, which indicates that there is a large hydrocarbon exploration potential at the basin-centered area. (C) 2008 Elsevier Ltd. All rights reserved.
WOS关键词	ALIPHATIC ACID ANIONS ; QUARTZ-CEMENTATION ; FLUID-FLOW ; DEEP BASIN ; NORTH-SEA ; PERMEABILITY ; RESERVOIRS ; ORIGIN ; POROSITY ; SYSTEMS
WOS研究方向	Geology
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000266903600018
资助机构	China National Major Science(2003CB214608) ; China National Major Science(2003CB214608) ; Chinese Ministry of Education, and Research Institute of Petroleum Exploration and Development, PetroChina(EEL2008-7) ; Chinese Ministry of Education, and Research Institute of Petroleum Exploration and Development, PetroChina(EEL2008-7) ; China National Major Science(2003CB214608) ; China National Major Science(2003CB214608) ; Chinese Ministry of Education, and Research Institute of Petroleum Exploration and Development, PetroChina(EEL2008-7) ; Chinese Ministry of Education, and Research Institute of Petroleum Exploration and Development, PetroChina(EEL2008-7) ; China National Major Science(2003CB214608) ; China National Major Science(2003CB214608) ; Chinese Ministry of Education, and Research Institute of Petroleum Exploration and Development, PetroChina(EEL2008-7) ; Chinese Ministry of Education, and Research Institute of Petroleum Exploration and Development, PetroChina(EEL2008-7) ; China National Major Science(2003CB214608) ; China National Major Science(2003CB214608) ; Chinese Ministry of Education, and Research Institute of Petroleum Exploration and Development, PetroChina(EEL2008-7) ; Chinese Ministry of Education, and Research Institute of Petroleum Exploration and Development, PetroChina(EEL2008-7)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/70578]
专题	中国科学院地质与地球物理研究所
通讯作者	Zhang, Liuping
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resource, Beijing 100029, Peoples R China 2.China Univ Petr, Natl Key Lab Petr Resource & Prospecting, Beijing 102249, Peoples R China 3.Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Liuping,Bai, Guoping,Luo, Xiaorong,et al. Diagenetic history of tight sandstones and gas entrapment in the Yulin Gas Field in the central area of the Ordos Basin, China[J]. MARINE AND PETROLEUM GEOLOGY,2009,26(6):974-989.
APA	Zhang, Liuping.,Bai, Guoping.,Luo, Xiaorong.,Ma, Xinhua.,Chen, Mengjin.,...&Yang, Wenxiu.(2009).Diagenetic history of tight sandstones and gas entrapment in the Yulin Gas Field in the central area of the Ordos Basin, China.MARINE AND PETROLEUM GEOLOGY,26(6),974-989.
MLA	Zhang, Liuping,et al."Diagenetic history of tight sandstones and gas entrapment in the Yulin Gas Field in the central area of the Ordos Basin, China".MARINE AND PETROLEUM GEOLOGY 26.6(2009):974-989.