Effects of oil expulsion and pressure on nanopore development in highly mature shale: Evidence from a pyrolysis study of the Eocene Maoming oil shale, south China
| العنوان: | Effects of oil expulsion and pressure on nanopore development in highly mature shale: Evidence from a pyrolysis study of the Eocene Maoming oil shale, south China |
|---|---|
| المؤلفون: | Ping'an Peng, Yuke Liu, Yun Li, Yongqiang Xiong |
| المصدر: | Marine and Petroleum Geology. 86:526-536 |
| بيانات النشر: | Elsevier BV, 2017. |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | Maturity (geology), 020209 energy, Stratigraphy, Mineralogy, chemistry.chemical_element, Geology, 02 engineering and technology, Oceanography, Nitrogen, Oil shale gas, Nanopore, Geophysics, Adsorption, chemistry, 0202 electrical engineering, electronic engineering, information engineering, Anhydrous, Economic Geology, Oil shale, Pyrolysis |
| الوصف: | The influence of oil-expulsion efficiency on nanopore development in highly mature shale was investigated by using anhydrous pyrolysis (425–600 °C) on solvent-extracted and non-extracted shales at a pressure of 50 MPa. Additional pyrolysis studies were conducted using non-extracted shales at pressures of 25 and 80 MPa to further characterize the impact of pressure on pore evolution at high maturity. The pore structures of the original shale and relevant artificially matured samples after pyrolysis were characterized by using low-pressure nitrogen and carbon-dioxide adsorption techniques, and gas yields during pyrolysis were measured. The results show that oil-expulsion efficiency can strongly influence gas generation and nanopore development in highly mature shales, as bitumen remained in shales with low oil expulsion efficiency significantly promotes gaseous hydrocarbon generation and nanopore (diameter 10 nm) remains flat at high maturation. In addition, high pressure can promote the development of micropores and fine mesopores in highly mature shales. |
| تدمد: | 0264-8172 |
| DOI: | 10.1016/j.marpetgeo.2017.06.012 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::82d322d8430307b461a2cb67e118290f https://doi.org/10.1016/j.marpetgeo.2017.06.012 |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi...........82d322d8430307b461a2cb67e118290f |
| قاعدة البيانات: | OpenAIRE |
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