| DOI: | 10.1306/10171312220
|
| Scopus记录号: | 2-s2.0-84901849280
|
| 论文题名: | Thermochemical sulfate reduction and fluid evolution of the Lower Triassic Feixianguan Formation sour gas reservoirs, northeast Sichuan Basin, China |
| 作者: | Jiang L.; Worden R.H.; Cai C.F.
|
| 刊名: | AAPG Bulletin
|
| ISSN: | 0149-1573
|
| EISSN: | 1558-9303
|
| 出版年: | 2014
|
| 发表日期: | 2014
|
| 卷: | 98, 期:5 | | 起始页码: | 947
|
| 结束页码: | 973
|
| 语种: | 英语
|
| Scopus关键词: | Barite
; Calcite
; Carbon dioxide
; Fluorspar
; Isotopes
; Mineralogy
; Petrography
; Precipitation (chemical)
; Quartz
; Recrystallization (metallurgy)
; Sedimentology
; Sulfate minerals
; Sulfur
; Calcite precipitation
; Diagenetic evolution
; Feixianguan formation
; Formation-water salinity
; Homogenization temperatures
; Jialingjiang formation
; Sour gas reservoirs
; Thermochemical sulfate reduction
; Arthroplasty
; basin evolution
; diagenesis
; dolomite
; evolution
; formation water
; gas field
; mineralization
; natural gas
; recrystallization
; reservoir
; salinity
; temperature effect
; Triassic
; uplift
; China
; Sichuan Basin
|
| Scopus学科分类: | Energy
; Earth and Planetary Sciences
|
| 英文摘要: | The dolomite-hosted, Lower Triassic Feixianguan Formation from the northeast Sichuan Basin, China, is an economically important reservoir that contains sour natural gas. These reservoirs were initially filled with oil, later replaced by gas during burial to 7000 m (22,965 ft) followed by uplift to about 4000 m (13,123 ft). We have studied the souring process (thermochemical sulfate reduction [TSR]) and diagenetic evolution of the Feixianguan Formation using detailed petrology, fluid-inclusion studies, and stable-isotope data from carbonate minerals. Pre-TSR diagenesis included (in time order) the eodiagenetic main stage of dolomitization by a reflux mechanism; fracture-related calcite cementation; barite, quartz, celestite, and fluorite mineralization; and a dolomite recrystallization stage. Thermochemical sulfate reduction resulted in anhydrite replacement by calcite, petroleum destruction, formation of sulfur-rich pyrobitumen and elemental sulfur, and generation of large volumes of H2S and CO2. Diagenesis during TSR can be subdivided into oil-stage TSR and gas-stage TSR, with oil-stage TSR defined by the presence of primary oil and bitumen inclusions in the TSR calcite. Based on aqueous inclusion homogenization temperatures, oil-stage TSR commenced at a temperature of 116°C, with a mode between 130°C and 140°C. Gas-stage TSR started at a temperature of 135°C and continued to maximum burial temperatures of about 220°C. Trace amounts of pyrite, barite, quartz, and celestite grew during TSR. Post-TSR diagenesis was dominated by frac-ture-related calcite precipitation as well as celestite and anhydrite crystallization. Formation water salinity increased from depositional values (3.5 wt. %) up to 24 wt. % during pre-TSR dolomite recrystallization probably because of an influx of evaporite-associated water from the overlying Jialingjiang Formation, although pre-TSR barite, quartz, celestite, and fluorite mineralization was associated with a transient decrease in water salinity. During TSR, formation water salinity decreased from 26 wt. % to as low as 4 wt. % as a result of water being produced during TSR reactions. Copyright © 2014. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84901849280&doi=10.1306%2f10171312220&partnerID=40&md5=0f1bb27db80d9ab6f8ae82265155cc1f
|
| Citation statistics: |
|
| 资源类型: | 期刊论文
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/13144
|
| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
|
|
There are no files associated with this item.
|
| Recommended Citation: | |
Jiang L.,Worden R.H.,Cai C.F.. Thermochemical sulfate reduction and fluid evolution of the Lower Triassic Feixianguan Formation sour gas reservoirs, northeast Sichuan Basin, China[J]. AAPG Bulletin,2014-01-01,98(5)
|
|
|