Origin of sulfides in the Middle and Lower Ordovician carbonates in Tahe oilfield, Tarim Basin
文献类型：期刊论文
| 作者 | Li KaiKai; Cai ChunFang; Cai LiuLu; Jiang Lei; Xiang Lei |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2012-03-01 |
| 卷号 | 28期号:3页码:806-814 |
| 关键词 | H2S Sulfur isotopes TSR Crude oil Tarim Basin |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | Middle and Lower Ordovician carbonate reservoirs in Tahe area, northern Tarim Basin, NW China, are shown to have been diagenetically altered by meteoric water and hot brines from the deeper underlying strata. Some of the reservoirs contain up to 8.3% H2S in natural gas composition and up to 11% H2S in gas-phase fluid inclusions in fracture- and vug-filling calcites, respectively. The host calcites have homogenization temperatures of fluid inclusions mainly from 110.2 to 198.9 degrees C, and the H2S and pyrite aggregate have delta(34) S values mainly from 18 parts per thousand to 22 parts per thousand. These features suggest that the sulfides may have generated by thermochemical sulfate reduction by organic matter (TSR). Oxidization of organic matter is evidenced by light delta(13) C values from -4.3 parts per thousand to - 8.3 parts per thousand for the calcite and from - 6.0 parts per thousand to - 13.8 parts per thousand for present formation water HCO3 (-). The fact that H2S concentrations in the associated gas are significantly lower than those of fluid inclusions may indicate that the H2S may have precipitated as pyrite, and/or incorporated into crude oils to generate sulfur enriched oils. Some pyrite shows light delta(34) S values as low as - 26 parts per thousand, indicating a result from bacterial sulphate reduction. However, distribution of pyrite of BSR origin is relatively limited. |
| WOS关键词 | THERMOCHEMICAL SULFATE REDUCTION ; HIGH H2S CONTENTS ; ISOTOPIC EVIDENCE ; FLUID INCLUSIONS ; SICHUAN BASIN ; RESERVOIRS ; CHINA ; BACTERIAL ; GASES |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000303640700009 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/84456]  |
| 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 | Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li KaiKai,Cai ChunFang,Cai LiuLu,et al. Origin of sulfides in the Middle and Lower Ordovician carbonates in Tahe oilfield, Tarim Basin[J]. ACTA PETROLOGICA SINICA,2012,28(3):806-814. |
| APA | Li KaiKai,Cai ChunFang,Cai LiuLu,Jiang Lei,&Xiang Lei.(2012).Origin of sulfides in the Middle and Lower Ordovician carbonates in Tahe oilfield, Tarim Basin.ACTA PETROLOGICA SINICA,28(3),806-814. |
| MLA | Li KaiKai,et al."Origin of sulfides in the Middle and Lower Ordovician carbonates in Tahe oilfield, Tarim Basin".ACTA PETROLOGICA SINICA 28.3(2012):806-814. |
入库方式： OAI收割
来源：地质与地球物理研究所
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