Pore characteristics and dominant controlling factors of overmature shales: A case study of the Wangyinpu and Guanyintang Formations in the Jiangxi Xiuwu Basin
文献类型：期刊论文
| 作者 | Gao, Fenglin1,2,3; Song, Yan1,2,4; Li, Zhuo1,2; Jiang, Zhenxue1,2; Gao, Zhiye1,2; Zhang, Xinxin5; Chen, Lei1,2,3; Liu, Qingxin1,2 |
| 刊名 | INTERPRETATION-A JOURNAL OF SUBSURFACE CHARACTERIZATION
 |
| 出版日期 | 2018-05-01 |
| 卷号 | 6期号:2页码:T393-T412 |
| ISSN号 | 2324-8858 |
| DOI | 10.1190/INT-2017-0128.1 |
| 英文摘要 | Because of the great potential for hydrocarbon generation, the Lower Cambrian Wangyinpu and Guanyintang Formations of the Jiangxi Xiuwu Basin have become the most important targets for shale-gas exploration in the Jiangxi province. We investigate the pore characteristics and main controlling factors of overmature shale using field emission-scanning electron microscopy, image-processing software (i.e., the Particles [Pores] and Crack Analysis System), X-ray diffraction, and gas-adsorption experiments. The results show that the shales have a high abundance of organic matter (OM), over maturity, and highly siliceous mineral content The kerogen type is identified as type I. OM pores are the most developed, followed by interparticle (interP) pores and intraparticle (intraP) pores. We combine complementary image processing and gas-adsorption methods to reveal that micropores are mainly from OM pores; mesopores are from OM pores and interP pores; and macropores are from OM pores, interP pores, and intraP pores. Although the number of micropores is at a maximum, the total contribution of mesopores and macropores to the pore volume (PV) is larger than that of micropores. However, the specific surface area (SSA) is mainly from the micropores. OM content and maturity are the main controlling factors for the development of pore structures. Because of overmaturity, OM loses its potential for hydrocarbon generation and new pores cannot be produced. Gas loss leads to reservoir pressure drop, and the pores generated during the mature stage collapse and even disappear because they lack support. Therefore, PV, SSA, and porosity decrease when the OM content is more than 10%. When the OM content is less than 10%, most of the OM pores are preserved because they are protected by the skeleton particles. |
| WOS关键词 | MISSISSIPPIAN BARNETT SHALE ; NORTHEASTERN BRITISH-COLUMBIA ; ORGANIC-RICH SHALES ; NORTH-CENTRAL TEXAS ; FORT-WORTH BASIN ; GAS-STORAGE ; GEOLOGICAL CONTROLS ; SICHUAN BASIN ; ADSORPTION MEASUREMENTS ; METHANE ADSORPTION |
| 资助项目 | National Science and Technology Major Project[2016ZX05034001-005] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000443758800012 |
| 出版者 | SOC EXPLORATION GEOPHYSICISTS |
| 资助机构 | National Science and Technology Major Project ; National Science and Technology Major Project ; National Science and Technology Major Project ; National Science and Technology Major Project |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/88556]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Gao, Fenglin |
| 作者单位 | 1.China Univ Petr, State Key Lab Petr Resources & Prospecting, Beijing, Peoples R China 2.China Univ Petr, Unconvent Nat Gas Inst, Beijing, Peoples R China 3.China Univ Petr, Unconvent Oil & Gas Cooperat Innovat Ctr, Beijing, Peoples R China 4.Res Inst Petr Explorat & Dev, Beijing, Peoples R China 5.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gao, Fenglin,Song, Yan,Li, Zhuo,et al. Pore characteristics and dominant controlling factors of overmature shales: A case study of the Wangyinpu and Guanyintang Formations in the Jiangxi Xiuwu Basin[J]. INTERPRETATION-A JOURNAL OF SUBSURFACE CHARACTERIZATION,2018,6(2):T393-T412. |
| APA | Gao, Fenglin.,Song, Yan.,Li, Zhuo.,Jiang, Zhenxue.,Gao, Zhiye.,...&Liu, Qingxin.(2018).Pore characteristics and dominant controlling factors of overmature shales: A case study of the Wangyinpu and Guanyintang Formations in the Jiangxi Xiuwu Basin.INTERPRETATION-A JOURNAL OF SUBSURFACE CHARACTERIZATION,6(2),T393-T412. |
| MLA | Gao, Fenglin,et al."Pore characteristics and dominant controlling factors of overmature shales: A case study of the Wangyinpu and Guanyintang Formations in the Jiangxi Xiuwu Basin".INTERPRETATION-A JOURNAL OF SUBSURFACE CHARACTERIZATION 6.2(2018):T393-T412. |
入库方式： OAI收割
来源：地质与地球物理研究所
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