Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1306/0328171608517048 |
Diagenesis of an evaporite-related carbonate reservoir in deeply buried Cambrian strata, Tarim Basin, northwest China | |
Jiang, Lei1,2; Worden, Richard H.3; Cai, Chun Fang1; Shen, Anjiang4; Crowley, Stephen F.3 | |
2018 | |
发表期刊 | AAPG BULLETIN
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ISSN | 0149-1423 |
EISSN | 1558-9153 |
出版年 | 2018 |
卷号 | 102期号:1页码:77-102 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA; England |
英文摘要 | Many hydrocarbon shows have been reported from potential evaporite-related carbonate reservoirs in the lower to middle Cambrian units in the Tarim Basin. Petrography, facies, and geochemical analyses from outcrop and core samples were integrated to document the effect of diagenetic evolution on these evaporite-related carbonate reservoirs. A simplified depositional model has been developed that reveals a restricted carbonate platform dominated by an evaporatic inner platform lagoon, with shoal and reef facies developed around the platform margins. Grainstones and packstones were deposited at the platform margin and on inner platform shoals, whereas carbonate mudstones and wackestones were deposited in the lagoon associated with evaporites. Early dolomitization and dissolution occurred related to the reflux of evaporated seawater. Breccia-associated fracture porosity caused by a short period of meteoric water-induced dissolution is the predominant type of effective porosity in the anhydrite-bearing dolomudstone reservoir. Thermochemical sulfate reduction (TSR) occurred in the deep subsurface diagenetic environment characterized by high-temperature (100 degrees C-160 degrees C) and high-salinity (16-26 wt. %) aqueous fluid inclusions in TSR calcite that has relatively negative delta C-13 values (as low as -12 parts per thousand Vienna Peedee belemnite) and elevated Sr-87/Sr-86 values. The porous dolomites contain solution-enlarged pores caused by dissolution of anhydrite and carbonate as a secondary consequence of TSR. This study shows that deeply buried, evaporite-related, ancient carbonate rocks may be effective reservoirs because of a combination of fracture porosity and TSR-induced secondary porosity. Evaporitic Cambrian carbonates buried to over 5000 m (16,500 ft) can thus be considered as targets for future exploration. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000430927700004 |
WOS关键词 | THERMOCHEMICAL SULFATE REDUCTION ; TRIASSIC FEIXIANGUAN FORMATION ; NORTHEAST SICHUAN BASIN ; FLUID INCLUSION ; GAS-RESERVOIRS ; DOLOMITE RESERVOIRS ; POROSITY EVOLUTION ; HYDROGEN-SULFIDE ; NW CHINA ; ORDOVICIAN |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/24573 |
专题 | 地球科学 |
作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beitucheng West Rd 19, Beijing 100029, Peoples R China; 2.Univ Texas Austin, Bur Econ Geol, Jackson Sch Geosci, Box 10, Austin, TX 78713 USA; 3.Univ Liverpool, Sch Environm Sci, Dept Earth & Ocean Sci, Pembroke St, Liverpool L69 3GP, Merseyside, England; 4.PetroChina Hangzhou Res Inst Geol, Xixi Rd 920, Hangzhou 310023, Zhejiang, Peoples R China |
推荐引用方式 GB/T 7714 | Jiang, Lei,Worden, Richard H.,Cai, Chun Fang,et al. Diagenesis of an evaporite-related carbonate reservoir in deeply buried Cambrian strata, Tarim Basin, northwest China[J]. AAPG BULLETIN,2018,102(1):77-102. |
APA | Jiang, Lei,Worden, Richard H.,Cai, Chun Fang,Shen, Anjiang,&Crowley, Stephen F..(2018).Diagenesis of an evaporite-related carbonate reservoir in deeply buried Cambrian strata, Tarim Basin, northwest China.AAPG BULLETIN,102(1),77-102. |
MLA | Jiang, Lei,et al."Diagenesis of an evaporite-related carbonate reservoir in deeply buried Cambrian strata, Tarim Basin, northwest China".AAPG BULLETIN 102.1(2018):77-102. |
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