Influence of Pore Water on the Gas Storage of Organic-Rich Shale
| Autor: | Caineng Zou, Maozhen Wang, Hua Tian, Shaobo Liu, Shuichang Zhang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
Macropore General Chemical Engineering Energy Engineering and Power Technology 02 engineering and technology 021001 nanoscience & nanotechnology chemistry.chemical_compound Pore water pressure Fuel Technology Adsorption 020401 chemical engineering chemistry Chemical engineering Kerogen Organic matter 0204 chemical engineering 0210 nano-technology Saturation (chemistry) Water content Oil shale |
| Zdroj: | Energy & Fuels. 34:5293-5306 |
| ISSN: | 1520-5029 0887-0624 |
| DOI: | 10.1021/acs.energyfuels.9b03415 |
| Popis: | Previous studies that utilize dry samples have been conducted on the nanoporosity of organic matter in shale. However, underground shales contain pore water that may greatly influence their pore structures and adsorbed gas content. To address this, a typical organic-rich, marine, gas-bearing shale in China was analyzed in this study. Water content and isothermal adsorption under different saturation conditions were determined, and the adsorbed and free gas contents were quantified. Across scales, water occurs within clays, between grains, and in fissures. In micropores and mesopores, gas is mainly adsorbed onto the surface of kerogen, as clay surfaces are water-saturated. In macropores and fractures, gas mainly exists in a free state. Adsorbed and free gas contents decrease with increasing water saturation in shale reservoirs. In high-production reservoirs, a limited amount of adsorbed gas is stored within micropores, while a relatively large amount of free gas is stored in larger pores and natural fractu... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|