Investigation into the apparent permeability and gas-bearing property in typical organic pores in shale rocks | |
Ji LL(姬莉莉); Lin M(林缅); Jiang WB(江文滨); Cao GH(曹高辉); Zhou J; Luo C | |
发表期刊 | Marine and Petroleum Geology |
2019-12 | |
卷号 | 110页码:871-885 |
ISSN | 0264-8172 |
摘要 | Although substantial advances have been made in investigating the storage and transport properties of shale gas in past decades, understanding of the flow characteristics and gas-bearing property in organic pores remains limited. In this paper, organic pores in the organic matter (OM) of the marine Longmaxi Formation are classified into six types based on the morphology and sizes of nanoscale pores. The structures of the six types of typical organic pores under high temperature and pressure are investigated based on the digital core compressibility method introduced in this paper. The results show that the pore-size distribution and connectivity of organic pores under high temperature and pressure are considerably different from those under conventional conditions. The apparent permeability of OM with different proportions of macropores, mesopores, and micropores are analyzed. The results demonstrate that the permeability of OM with Type 1 organic pores has the largest changes after compaction, whereas OM with Type 5 organic pores has a relatively smaller change. The regularities of the absolute adsorption amount and the free gas amount of OM with typical organic pores are also investigated. The absolute adsorption amount of OM decreases with the proportion of macropores, whereas the amount of free gas of OM increases. Finally, a chart of the absolute adsorption amount and the free gas amount of OM at different depths is given, which is helpful for estimating the gas-bearing capacity of OM and preliminary understanding the quality of a shale reservoir. |
DOI | 10.1016/j.marpetgeo.2019.08.030 |
收录类别 | SCI ; EI |
语种 | 英语 |
WOS记录号 | WOS:000498747500053 |
论文分区 | 一类 |
力学所作者排名 | 1 |
RpAuthor | Lin M |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/79773 |
专题 | 流固耦合系统力学重点实验室 |
作者单位 | 1.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100190, Peoples R China 3.PetroChina, Southwest Branch, Chengdu 61050, Sichuan, Peoples R China |
推荐引用方式 GB/T 7714 | Ji LL,Lin M,Jiang WB,et al. Investigation into the apparent permeability and gas-bearing property in typical organic pores in shale rocks[J]. Marine and Petroleum Geology,2019,110:871-885. |
APA | Ji LL,Lin M,Jiang WB,Cao GH,Zhou J,&Luo C.(2019).Investigation into the apparent permeability and gas-bearing property in typical organic pores in shale rocks.Marine and Petroleum Geology,110,871-885. |
MLA | Ji LL,et al."Investigation into the apparent permeability and gas-bearing property in typical organic pores in shale rocks".Marine and Petroleum Geology 110(2019):871-885. |
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