The molecular and carbon isotopic constrains on origin and storage of Longmaxi Formation shale gas in Changning area, Sichuan Basin, China
文献类型：期刊论文
| 作者 | Tang, Qingyan1,2; Zhang, Mingjie1,2; Cao, Chunhui1,2,3; Song, Zhe1,2; Li, Zhongping1,2,3; Hu, Xiao1,2 |
| 刊名 | Interpretation-A Journal of Subsurface Characterization
 |
| 出版日期 | 2015-05-01 |
| 卷号 | 3期号:2页码:SJ35-SJ47 |
| DOI | 10.1190/INT-2014-0158.1 |
| 文献子类 | Article |
| 英文摘要 | We have developed a vacuum-crushing method for the extraction of gases stored in shale for the determination of gas yield, chemical composition, and carbon isotopic composition by online gas-chromatography and mass spectrometry. Analysis of the evacuation and parallel experiments showed low standard deviation and good reproducibility. This approach significantly improved the detection limits for trace-gas analysis in shale and measured multiple nonhydrocarbon gas components in a single run. We analyzed the chemical and carbon isotopic compositions of the gases released by one-step vacuum crushing from nineteen samples of organic-rich Longmaxi Formation (Fm.) shale in Changning outcrop, Sichuan Basin, China, and we studied the main controls on gas chemistry of retained gas in the Longmaxi Shale. The results showed that the crushed gas is high in N-2 and CO2 but low in CH4. The crushed gas has obviously lower C-1/CO2 ratios than the gas produced from the Longmaxi Fm. after hydraulic fracturing; it was dominated by CH4-dry gas while it is normalized to 100% total gaseous hydrocarbons and similar in chemical composition to hydrocarbon gases in the produced gas. Yields of CH4, CO2, and H-2 in the crushed gas of most samples showed a weak positive correlation with total organic carbon (TOC) contents. The crushed gas had significantly light delta C-13(1) (on average -35.8%) values and similar delta C-13(2) values when compared with the produced gas in the Changning area. The delta C-13 values of C-1, C-2, C-3, and CO2 have similar features to the produced gas from the Weiyuan shale-gas play. Isotopically reversed trends (delta C-13(1) > delta C-13(2)) between ethane and methane were observed for some samples. Our findings regarding the similarity in chemical and carbon isotopic compositions between crushed gas and produced gas from the Weiyuan shale-gas play might provide important evidence of the origin and storage of shale gas in the organic-rich Silurian Longmaxi Fm. |
| WOS关键词 | FORT-WORTH BASIN ; MISSISSIPPIAN BARNETT SHALE ; NORTH-CENTRAL TEXAS ; ORGANIC-MATTER ; PETROLEUM SYSTEMS ; SOUTHERN SICHUAN ; THERMAL MATURITY ; HYDROCARBONS ; REVERSALS ; MUDROCKS |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000364282200008 |
| 资助机构 | 973 Program of China(2012CB214701) ; 973 Program of China(2012CB214701) ; Natural Science Foundation of China(41372095 ; Natural Science Foundation of China(41372095 ; Key Project of Chinese Ministry of Education(311010) ; Key Project of Chinese Ministry of Education(311010) ; 41472070) ; 41472070) ; 973 Program of China(2012CB214701) ; 973 Program of China(2012CB214701) ; Natural Science Foundation of China(41372095 ; Natural Science Foundation of China(41372095 ; Key Project of Chinese Ministry of Education(311010) ; Key Project of Chinese Ministry of Education(311010) ; 41472070) ; 41472070) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/62189]  |
| 专题 | 地质与地球物理研究所_兰州油气中心 |
| 作者单位 | 1.Lanzhou Univ, Sch Earth Sci, Lanzhou 730000, Peoples R China 2.Lanzhou Univ, Key Lab Mineral Resources Western China Gansu Pro, Lanzhou 730000, Peoples R China 3.Chinese Acad Sci, Key Lab Petr Resources, Inst Geol & Geophys, Lanzhou, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tang, Qingyan,Zhang, Mingjie,Cao, Chunhui,et al. The molecular and carbon isotopic constrains on origin and storage of Longmaxi Formation shale gas in Changning area, Sichuan Basin, China[J]. Interpretation-A Journal of Subsurface Characterization,2015,3(2):SJ35-SJ47. |
| APA | Tang, Qingyan,Zhang, Mingjie,Cao, Chunhui,Song, Zhe,Li, Zhongping,&Hu, Xiao.(2015).The molecular and carbon isotopic constrains on origin and storage of Longmaxi Formation shale gas in Changning area, Sichuan Basin, China.Interpretation-A Journal of Subsurface Characterization,3(2),SJ35-SJ47. |
| MLA | Tang, Qingyan,et al."The molecular and carbon isotopic constrains on origin and storage of Longmaxi Formation shale gas in Changning area, Sichuan Basin, China".Interpretation-A Journal of Subsurface Characterization 3.2(2015):SJ35-SJ47. |
入库方式： OAI收割
来源：地质与地球物理研究所
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