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Effect of thermochemical sulfate reduction on carbonate reservoir quality: Cambrian and Ordovician oilfield, Tazhong area, Tarim basin, China

文献类型：期刊论文

作者Jia, Lianqi1,4,9; Cai, Chunfang5,6,8; Zhang, Jingong4,9; Liu, Lijing4,9; Luo, Qingyong3; Li, Kaikai2,7
刊名MARINE AND PETROLEUM GEOLOGY
出版日期2021
卷号123页码:19
关键词Thermochemical sulfate reduction Ultra-deep burial Carbonate reservoir Fluid inclusion Stable isotope Tazhong area Tarim basin
ISSN号0264-8172
DOI10.1016/j.marpetgeo.2020.104745
英文摘要Deep (4000-6000 m) and ultra-deep burial (>6000 m) carbonate reservoirs are becoming important petroleum exploration targets of China and worldwide basin. Thermochemical sulfate reduction (TSR) may be pervasive in the deep and ultra-deep burial petroliferous carbonate strata associated with evaporite. However, there is still considerable confusion on the effect of TSR on reservoir quality. Petrography, geochemistry and fluid inclusion data from carbonate reservoirs of Tarim Basin were integrated to resolve the disagreement. Based on distribution of sulfur-bearing mineral, SO42- concentrations and SO42-/Clratios in both formation water and fluid trapped in fluid inclusion, we propose that SO42- in formation water is likely major reactant involved in TSR reaction of North Slope, whereas coarsely diagenetic anhydride is likely major sulfate reactant involved in TSR reaction of East Burial Hill Belt. Silurian fracture-filling pyrite has 834S values similar to those of Ordovician fracture-filling pyrite, H2S and sulfur, suggesting that TSR dissolved sulfate involved in (North Slope) may occur in a partly open system for H2S and CO2. However, TSR diagenetic anhydride involved in (East Burial Hill Belt) may occur in a closed diagenetic system. TSR in a partly open-system, associated with gas charge and flow of cross formational fluids, probably increased fluid pressure, and further transported H2S, CO2 and solute from dissolution through fracture. A closed system of anhydrite-bearing strata seems to hinder transports of TSR-derived CO2 or bicarbonate, and result in precipitation of TSR calcite, pyrite and bitumen close to the TSR sites. In combination with petrographic observations, intense dissolution in North Slope have released more inorganic CO2 leading to TSR calcite and CO2 in the natural gas showing delta C-13 values much heavier relative to delta C-13 values of TSR calcites in East Burial Hill Belt as light as 13.4 parts per thousand. TSR-induced dissolution of carbonate minerals during oil-dominated TSR may be related to the reaction of dolomite with anhydride and release of H+ due to pyrite precipitation, rather than new formed water during TSR. Similar to geological settings of Ordovician TSR, anhydrite-poor Lower Cambrian dolostones underlying evaporites seals may thus be the most promising target for future exploration success in ultra-deep Cambrian reservoirs of Tarim Basin. The controversy about the effects of TSR on reservoir quality can partly be ascribed to differently geological settings where TSR occurred.
资助项目National Natural Science Foundation of China[41972143] ; National Natural Science Foundation of China[42072127] ; National Natural Science Foundation of China[41502148] ; National Natural Science Foundation of China[41502004] ; National Natural Science Foundation of China[41672143] ; National Science and Technology Major Project of China on Petroleum Study[2017ZX05008003-040]
WOS研究方向Geology
语种英语
WOS记录号WOS:000598421800001
出版者ELSEVIER SCI LTD
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science and Technology Major Project of China on Petroleum Study ; National Science and Technology Major Project of China on Petroleum Study ; National Science and Technology Major Project of China on Petroleum Study ; National Science and Technology Major Project of China on Petroleum Study ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science and Technology Major Project of China on Petroleum Study ; National Science and Technology Major Project of China on Petroleum Study ; National Science and Technology Major Project of China on Petroleum Study ; National Science and Technology Major Project of China on Petroleum Study ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science and Technology Major Project of China on Petroleum Study ; National Science and Technology Major Project of China on Petroleum Study ; National Science and Technology Major Project of China on Petroleum Study ; National Science and Technology Major Project of China on Petroleum Study ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Science and Technology Major Project of China on Petroleum Study ; National Science and Technology Major Project of China on Petroleum Study ; National Science and Technology Major Project of China on Petroleum Study ; National Science and Technology Major Project of China on Petroleum Study
源URL[http://ir.iggcas.ac.cn/handle/132A11/99951]  
专题地质与地球物理研究所_中国科学院油气资源研究重点实验室
通讯作者Jia, Lianqi; Cai, Chunfang
作者单位1.Youth Innovat Team Shaanxi Univ Basin Evolut & En, Xian, Peoples R China
2.China Univ Geosci Beijing, Sch Energy Resources, Beijing 100083, Peoples R China
3.China Univ Petr, State Key Lab Petr Resources & Prospecting, Beijing 102249, Peoples R China
4.Northwest Univ, State Key Lab Continental Dynam, Xian 710069, Peoples R China
5.Yangtze Univ, Key Lab Oil & Gas Resources & Explorat Technol, Wuhan 430100, Peoples R China
6.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, 19 Beitucheng Western Rd, Beijing 100049, Peoples R China
7.Minist Educ, Key Lab Marine Reservoir Evolut & Hydrocarbon Enr, Beijing, Peoples R China
8.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China
9.Northwest Univ, Dept Geol, Xian 710069, Peoples R China
推荐引用方式
GB/T 7714		 Jia, Lianqi,Cai, Chunfang,Zhang, Jingong,et al. Effect of thermochemical sulfate reduction on carbonate reservoir quality: Cambrian and Ordovician oilfield, Tazhong area, Tarim basin, China[J]. MARINE AND PETROLEUM GEOLOGY,2021,123:19.
APA Jia, Lianqi,Cai, Chunfang,Zhang, Jingong,Liu, Lijing,Luo, Qingyong,&Li, Kaikai.(2021).Effect of thermochemical sulfate reduction on carbonate reservoir quality: Cambrian and Ordovician oilfield, Tazhong area, Tarim basin, China.MARINE AND PETROLEUM GEOLOGY,123,19.
MLA Jia, Lianqi,et al."Effect of thermochemical sulfate reduction on carbonate reservoir quality: Cambrian and Ordovician oilfield, Tazhong area, Tarim basin, China".MARINE AND PETROLEUM GEOLOGY 123(2021):19.

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来源：地质与地球物理研究所

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