Origin of high H2S concentrations in the Upper Permian Changxing reservoirs of the Northeast Sichuan Basin, China

doi:10.1016/j.marpetgeo.2014.05.011

	Origin of high H2S concentrations in the Upper Permian Changxing reservoirs of the Northeast Sichuan Basin, China
	Li, Kaikai 1,2; Cai, Chunfang 2; Hou, Dujie 1; He, Xunyun 3,4; Jiang, Lei 2; Jia, Lianqi 2; Cai, Liulu 5
刊名	MARINE AND PETROLEUM GEOLOGY
	2014-11-01
卷号	57 页码:233-243
关键词	Carbonate-associated sulfate Isotope Thermochemical sulfate reduction Dolomitization
ISSN号	0264-8172
DOI	10.1016/j.marpetgeo.2014.05.011
文献子类	Article
英文摘要	Intense thermochemical sulfate reduction (TSR) and up to 18% H2S are found in the Upper Permian Changxing Formation (P(3)ch) in the northeast (NE) Sichuan Basin, China, despite that rare gypsum or anhydrite was found in this formation. Here, we present new concentration data of carbonate-associated sulfate (CAS) from carbonate host rocks, C, O, and Sr isotope data for TSR-related calcites, and S isotope data for sulfur compounds obtained during this study. These data along with spatial-temporal changes in palaeogeopressure conditions, hydraulic conductivity and the physical capacity indicate that the H2S was generated locally from TSR within the P(3)ch reservoirs. We propose that the reactive sulfates were derived from CAS released during dolomitization and recrystallization of earlier dolomite within the P(3)ch Fm. and from the cross-formational migration of evaporative brines from the Lower Triassic Feixianguan Formation (T(1)f) to P(3)ch Fm. Our calculation shows that the two sources could provide enough SO42- for the generation of H2S within the P(3)ch reservoirs. Early downward migration of sulfate-rich evaporative brines from the T(1)f formation occurred in near-surface and shallow burial diagenetic settings (mainly <1000 m). The evaporative brines seeped into porous grainstones and displaced preexisting seawater, causing pervasive dolomitization within the P(3)ch Fm. Subsequently, TSR calcites precipitated from the pore water have high Sr concentrations (up to 7767 ppm), close to the T(1)f TSR calcites, and Sr-87/Sr-86 ratios mainly from 0.7074 to 0.7078, which are significantly higher than those of Late Permian seawater but within the range of early Triassic seawater. (C) 2014 Elsevier Ltd. All rights reserved.
WOS关键词	THERMOCHEMICAL SULFATE REDUCTION ; PUGUANG GAS-FIELD ; TRIASSIC FEIXIANGUAN FORMATION ; CARBON-ISOTOPE FRACTIONATION ; METHANE-DOMINATED TSR ; CHEMICAL COMPACTION ; SMACKOVER FORMATION ; BURIAL DIAGENESIS ; SEAWATER SULFATE ; OIL-CRACKING
WOS研究方向	Geology
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000342530100015
资助机构	National Science Foundation for Distinguished Young Scholars of China(41202108) ; National Science Foundation for Distinguished Young Scholars of China(41202108) ; united foundation of NSFC and China's Petroleum Chemical Industry(40839906) ; united foundation of NSFC and China's Petroleum Chemical Industry(40839906) ; Fundamental Research Funds for the Central Universities(2652013069) ; Fundamental Research Funds for the Central Universities(2652013069) ; National Key Petroleum Project(2011ZX05008-003) ; National Key Petroleum Project(2011ZX05008-003) ; National Science Foundation for Distinguished Young Scholars of China(41202108) ; National Science Foundation for Distinguished Young Scholars of China(41202108) ; united foundation of NSFC and China's Petroleum Chemical Industry(40839906) ; united foundation of NSFC and China's Petroleum Chemical Industry(40839906) ; Fundamental Research Funds for the Central Universities(2652013069) ; Fundamental Research Funds for the Central Universities(2652013069) ; National Key Petroleum Project(2011ZX05008-003) ; National Key Petroleum Project(2011ZX05008-003) ; National Science Foundation for Distinguished Young Scholars of China(41202108) ; National Science Foundation for Distinguished Young Scholars of China(41202108) ; united foundation of NSFC and China's Petroleum Chemical Industry(40839906) ; united foundation of NSFC and China's Petroleum Chemical Industry(40839906) ; Fundamental Research Funds for the Central Universities(2652013069) ; Fundamental Research Funds for the Central Universities(2652013069) ; National Key Petroleum Project(2011ZX05008-003) ; National Key Petroleum Project(2011ZX05008-003) ; National Science Foundation for Distinguished Young Scholars of China(41202108) ; National Science Foundation for Distinguished Young Scholars of China(41202108) ; united foundation of NSFC and China's Petroleum Chemical Industry(40839906) ; united foundation of NSFC and China's Petroleum Chemical Industry(40839906) ; Fundamental Research Funds for the Central Universities(2652013069) ; Fundamental Research Funds for the Central Universities(2652013069) ; National Key Petroleum Project(2011ZX05008-003) ; National Key Petroleum Project(2011ZX05008-003)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/85093]
专题	中国科学院地质与地球物理研究所
通讯作者	Li, Kaikai
作者单位	1.China Univ Geosci, Energy Resource Dept, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources, Beijing 100029, Peoples R China 3.PetroChina Hangzhou Res Inst Geol, Hangzhou 310023, Zhejiang, Peoples R China 4.CNPC, Key Lab Carbonate Reservoirs, Hangzhou 310023, Zhejiang, Peoples R China 5.Gen Res Inst Nonferrous Met, Natl Engn Lab Biohydromet, Beijing 100088, Peoples R China
推荐引用方式 GB/T 7714	Li, Kaikai,Cai, Chunfang,Hou, Dujie,et al. Origin of high H2S concentrations in the Upper Permian Changxing reservoirs of the Northeast Sichuan Basin, China[J]. MARINE AND PETROLEUM GEOLOGY,2014,57:233-243.
APA	Li, Kaikai.,Cai, Chunfang.,Hou, Dujie.,He, Xunyun.,Jiang, Lei.,...&Cai, Liulu.(2014).Origin of high H2S concentrations in the Upper Permian Changxing reservoirs of the Northeast Sichuan Basin, China.MARINE AND PETROLEUM GEOLOGY,57,233-243.
MLA	Li, Kaikai,et al."Origin of high H2S concentrations in the Upper Permian Changxing reservoirs of the Northeast Sichuan Basin, China".MARINE AND PETROLEUM GEOLOGY 57(2014):233-243.