學(xué)術(shù)報(bào)告
報(bào)告題目：Understanding of Anisotropic Nanoscale Pore Deformations of
Coal and Shale under Far-Field Stress Boundary
報(bào) 告 人： Dr. Shimin Liu（劉世民） 終身教授、博導(dǎo)
時(shí) 間： 2022年4月21日（周四）上午9:00
騰訊會(huì)議：ID 650-675-914
報(bào)告人單位：Pennsylvania State University(賓州州立大學(xué))
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The nature of flow in shale is multi-mechanistical processes, including sorption, diffusion, slip flow, advection, and flow-induced micro-structuring, which are dynamically coupled with the pore structure deformation under stress condition. The state-of-the-art in-situ small angle neutron scattering (SANS) was used to characterize the nanopore deformation and its anisotropy under far-field uniaxial stress conditions. Porod invariant mapping was used to estimate the apparent porosities at different azimuthal angles. Structure free orientation factors were used to characterize orientation degree in nanopores under stress quantitatively. Based on the results, higher values of apparent porosities are shown near the bedding direction. At different azimuthal angles, the apparent porosities increase with increasing uniaxial stress in the elastic deformation range (54–575 bar) for the measured rock. The pore-scale degree of orientation is a size-dependent parameter, and pore orientation along the bedding generally increases as pore size increases. The degree of orientation in nanopores (in a size range between~2×103 ? and~15 ?) tends to increase first and then decreases with increasing stress loading, although different from that of macropores, indicating higher stresses on the nanopore edges along the bedding direction and then on the nanopore body along the normal direction. There is no distinct permanent porosity change within the measured stress range (0–575 bar) after the stress relief. As the Editor-in-Chief of IJCST, Dr. Liu will also introduce the journal’s scope and its role in the energy industry, as well as the decision-making process for the received manuscripts in the peer-reviewed journal.
報(bào)告人簡(jiǎn)介： 劉世民博士，美國(guó)賓州州立大學(xué)能源與礦物工程學(xué)院終身教授、博士生導(dǎo)師，International Journal of Coal Science & Technology (IJCST)主編。長(zhǎng)期從事煤層氣、頁巖氣等非常規(guī)儲(chǔ)層中氣體滲流、氣–巖相互作用機(jī)制、地質(zhì)資源評(píng)價(jià)、二氧化碳地質(zhì)封存等方面的研究工作，在Fuel, International Journal of Coal Geology, Journal of Petroleum Science and Engineering, Journal of Natural Gas Science and Engineering等國(guó)際一流期刊發(fā)表學(xué)術(shù)論文200余篇，H指數(shù)43，并與美國(guó)橡樹嶺國(guó)家實(shí)驗(yàn)室、美國(guó)地質(zhì)調(diào)查局等研究機(jī)構(gòu)建立了長(zhǎng)期的專業(yè)合作關(guān)系。
油氣藏地質(zhì)及開發(fā)工程國(guó)家重點(diǎn)實(shí)驗(yàn)室
西南石油大學(xué)科研處
石油與天然氣工程學(xué)院
SPE成都分部
2022年4月18日
