干旱区生态环境知识资源中心(Arid): Sedimentary and Diagenetic Features and Their Impacts on Microbial Carbonate Reservoirs in the Fourth Member of the Middle Triassic Leikoupo Formation, Western Sichuan Basin, China

Arid

DOI	10.3390/en13092293
	Sedimentary and Diagenetic Features and Their Impacts on Microbial Carbonate Reservoirs in the Fourth Member of the Middle Triassic Leikoupo Formation, Western Sichuan Basin, China
	Wang, Yuanchong; Jiang, Weimin; Liu, Hangyu; Liu, Bo; Zheng, Haofu; Song, Xiaobo; Wang, Qiongxian; Wang, Wenkai; Li, Yong
通讯作者	Liu, B
来源期刊	ENERGIES
EISSN	1996-1073
出版年	2020
卷号	13 期号:9
英文摘要	In recent years, the discovery of two gas fields in the fourth member of the Leikoupo Formation in the Western Sichuan Basin of SW China confirmed the exploration potential of microbial carbonates. The aim of the present study is to clarify the formation mechanism of the microbial reservoirs in the Leikoupo Formation. For this purpose, lithofacies, depositional environments, and diagenesis analyses were performed in samples collected from cores of 12 wells. The climate of study area was arid during Anisian time, and the water body was restricted. In such a climate, an evaporitic environment was developed, where ten types of lithofacies, dominated by microbial carbonates and gypsum rocks, were recognized. Thrombolites and stromatolites are the main high-quality reservoirs rock types in the fourth member of the Leikoupo Formation in the Western Sichuan Basin of SW China, which developed as microbial mounds, with reservoir space of microbial inter-clot pores, intra-clot pores, fenestral pores, inter-crystalline pores, and cracks. The microbial inter-clot pores are the main reservoir space, formed by trapping and binding of marls by benthic microbial communities. These pores were partially filled with evaporites because of the arid climate, which were subsequently dissolved (mainly gypsum) in the syn-depositional period, thus greatly improving the quality of reservoirs. Although some pores were occluded by multi-stage cements during the burial stage, major pores were well preserved own to the early dolomitization, rapid burial of the Leikoupo Formation, and early charging of hydrocarbon. The early dolomitization enhanced the anti-compaction ability of microbial carbonates during the burial stage. Rapid burial of the Leikoupo succession slowed down early cementation, and it also accelerated the maturation and expulsion process source rock to promote early charging of hydrocarbon in pores, which created a closed system, inhibiting strong burial cementation.
英文关键词	sedimentation diagenesis microbial carbonates reservoir formation the Middle Triassic Leikoupo Formation the Western Sichuan Basin of SW China
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000535739300171
WOS关键词	RARE-EARTH-ELEMENTS ; ISOTOPIC COMPOSITION ; MASS EXTINCTION ; TARIM BASIN ; POROSITY ; STROMATOLITES ; SEAWATER ; MARINE ; GEOCHEMISTRY ; DIVERSITY
WOS类目	Energy & Fuels
WOS研究方向	Energy & Fuels
来源机构	北京大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324545
作者单位	[Wang, Yuanchong; Jiang, Weimin; Liu, Hangyu; Liu, Bo] Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China; [Zheng, Haofu] Chongqing Jiaotong Univ, Coll River & Ocean Engn, Chongqing 400074, Peoples R China; [Song, Xiaobo; Wang, Qiongxian; Wang, Wenkai; Li, Yong] SINOPEC, Res Inst Petr Explorat & Dev, Southwest Petr Branch, Chengdu 610041, Peoples R China
推荐引用方式 GB/T 7714	Wang, Yuanchong,Jiang, Weimin,Liu, Hangyu,et al. Sedimentary and Diagenetic Features and Their Impacts on Microbial Carbonate Reservoirs in the Fourth Member of the Middle Triassic Leikoupo Formation, Western Sichuan Basin, China[J]. 北京大学,2020,13(9).
APA	Wang, Yuanchong.,Jiang, Weimin.,Liu, Hangyu.,Liu, Bo.,Zheng, Haofu.,...&Li, Yong.(2020).Sedimentary and Diagenetic Features and Their Impacts on Microbial Carbonate Reservoirs in the Fourth Member of the Middle Triassic Leikoupo Formation, Western Sichuan Basin, China.ENERGIES,13(9).
MLA	Wang, Yuanchong,et al."Sedimentary and Diagenetic Features and Their Impacts on Microbial Carbonate Reservoirs in the Fourth Member of the Middle Triassic Leikoupo Formation, Western Sichuan Basin, China".ENERGIES 13.9(2020).