Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1306/08161918071 |
Influence of tectonic exhumation on porosity of Wufeng-Longmaxi shale in the Fuling gas field of the eastern Sichuan Basin, China | |
Liu, Rui1,2; Hao, Fang3,4; Engelder, Terry2; Shu, Zhiguo5; Yi, Jizheng5; Xu, Shang3; Teng, Changyu3 | |
2020-04-15 | |
发表期刊 | AAPG BULLETIN |
ISSN | 0149-1423 |
EISSN | 1558-9153 |
出版年 | 2020 |
卷号 | 104期号:4页码:939-959 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | Thermal cracking of organic matter (OM) can enhance gas-shale porosity. However, thermally matured shales are generally characterized by low porosity with high OM content in tectonic exhumation settings. The Wufeng-Longmaxi shale in the Fuling gas field, China, was investigated via bulk analysis and scanning electron microscopy to reveal the influence of tectonic exhumation on the porosity of OM-rich shale. Thermal maturity and organic and mineralogical compositions are regionally homogeneous in the Fuling gas field. Shale porosity is positively correlated with total organic carbon (TOC) and clay mineral content in the gentle and open anticlines, respectively. The OM-hosted pores were preserved with spherical morphologies because of overpressure-associated overburden stress unloading in the gentle anticlines, whereas OM-hosted pores in the open anticlines are characterized by high aspect ratios and are regularly aligned perpendicular to lateral compression stress. A simple simulation confirmed that tectonic folding and compaction during exhumation caused the loss of porosity in the inner arcs of the open anticlines. Only pressure shadows formed by assemblages of clay mineral platelets and mechanically competent grains inhibited tectonic compaction of some OM-hosted pores in the open anticlines. Tectonic compaction of porosity generally increased the mean value of water saturation in the open anticlines. The extremely high water saturation (>60%) in the high-TOC interval (>2 wt. %) was generally associated with natural fractures, suggesting the occurrence of gas leakage. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000526969200009 |
WOS关键词 | MISSISSIPPIAN BARNETT SHALE ; CLAY MINERAL DIAGENESIS ; NORTH-CENTRAL TEXAS ; HOSTED PORE SYSTEM ; FORT-WORTH BASIN ; ORGANIC-MATTER ; SEDIMENTARY BASINS ; ALBANY SHALE ; MUDSTONES ; EVOLUTION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
URL | 查看原文 |
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/248732 |
专题 | 地球科学 |
作者单位 | 1.Southwest Petr Univ, Sch Geosci & Technol, Chengdu, Sichuan, Peoples R China; 2.Penn State Univ, Dept Geosci, University Pk, PA 16802 USA; 3.China Univ Geosci, Key Lab Tecton & Petr Resources, Minist Educ, Wuhan, Hubei, Peoples R China; 4.China Univ Petr, Sch Geosci, Qingdao, Shandong, Peoples R China; 5.Sinopec Fianghan Oilfield Co, Qianjiang, Hubei, Peoples R China |
推荐引用方式 GB/T 7714 | Liu, Rui,Hao, Fang,Engelder, Terry,et al. Influence of tectonic exhumation on porosity of Wufeng-Longmaxi shale in the Fuling gas field of the eastern Sichuan Basin, China[J]. AAPG BULLETIN,2020,104(4):939-959. |
APA | Liu, Rui.,Hao, Fang.,Engelder, Terry.,Shu, Zhiguo.,Yi, Jizheng.,...&Teng, Changyu.(2020).Influence of tectonic exhumation on porosity of Wufeng-Longmaxi shale in the Fuling gas field of the eastern Sichuan Basin, China.AAPG BULLETIN,104(4),939-959. |
MLA | Liu, Rui,et al."Influence of tectonic exhumation on porosity of Wufeng-Longmaxi shale in the Fuling gas field of the eastern Sichuan Basin, China".AAPG BULLETIN 104.4(2020):939-959. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论