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Micro-storage State and Mechanism of Shale Gas
| Content Provider | Scilit |
|---|---|
| Author | Zhao, Tianyi Peng, Zeyang Chen, Gang Tian, Lingyu Qiao, Hui Li, Qianwen |
| Copyright Year | 2020 |
| Description | Journal: Iop Conference Series: Earth and Environmental Science Shale gas has attracted increasing attention as a new potential source of natural gas in recent years. Accurate micro-storage and mechanism of shale gas is important for defining and describing the adsorption characteristics, gas-in-place estimates. Organic-rich shale gas reservoirs were usually deposited under water environment which has great impact on shale gas adsorption. Different from the widely used solid-gas interface adsorption theory, the pore system in original shale reservoir is divided into solid-gas system and solid-liquid-gas system. In same statement, shale pores have stronger interaction with water molecules than $CH_{4}$ molecules, especially in solid-gas system. Water molecules mainly formed as competitive adsorption with shale gas on solid surface (solid-gas system) and liquid water surface (solid-liquid-gas system). Maxim gravitational potential energy, Ψ$ _{max}$, the distance where Ψ$ _{max}$ occurs, z$ _{m}$ and limited pore side, D$ _{L}$ are given. When pore size D < D$ _{L}$, no matter in what position the adsorbed molecules is, it force by both sides of the pore silts. When D > D$ _{L}$, the ratio of unaffected area increases to approximately 100% with pore side. When D < 10 nm, the ratio increases rapidly this means that the ratio of free gas increases quickly. When D > 50 nm, the ratio of unaffected area almost reaches 100%, which means that the content of free gas is far greater than the adsorbed gas. This study not only provides a new classification of shale pore system, but also can act as a reference to better understanding the adsorption mechanism of shale reservoir. |
| Related Links | https://iopscience.iop.org/article/10.1088/1755-1315/571/1/012008/pdf |
| ISSN | 17551307 |
| e-ISSN | 17551315 |
| DOI | 10.1088/1755-1315/571/1/012008 |
| Journal | Iop Conference Series: Earth and Environmental Science |
| Issue Number | 1 |
| Volume Number | 571 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2020-11-01 |
| Access Restriction | Open |
| Subject Keyword | Journal: Iop Conference Series: Earth and Environmental Science Petroleum Engineering Shale Gas Solid Gas Gas System Shale Pore Shale Reservoir Pore System |
| Content Type | Text |
| Resource Type | Article |
| Subject | Earth and Planetary Sciences Physics and Astronomy Environmental Science |
