caa a22 4500 606226133 CHVBK 20210128101151.0 cr unu---uuuuu 210128e20150701xx s 000 0 eng 10.1007/s10553-015-0601-1 doi (NATIONALLICENCE)springer-10.1007/s10553-015-0601-1 Theoretical Study of the Gas Slippage Effect in the Pore Space of Tight Sandstones in the Presence of a Water Phase [Elektronische Daten] [Gang Lei, Pingchuan Dong, Shaoyuan Mo, Zisen Wu] Compared with the pore throat radius in tight sandstones, the mean free path of a molecule can no longer be neglected. As a result, the gas slippage effect (the Klinkenberg effect) in tight sandstones is quite significant and must be taken into account. The goal of this work was to use an analytical expression to show the effect of pore space structural parameters and temperature on the gas slippage factor, taking into account water saturation in tight sandstones. The mathematical model including water saturation was derived from fractal theory. The calculations of the gas slippage factor (the Klinkenberg constant) using the proposed model agree well with experimental data presented in the literature. We have also studied the effect of pore space structural parameters and temperature on the gas slippage factor for different water saturation values. The gas slippage factor correlates with the tortuosity fractal dimension of the pore channels for high water saturation. This distinguishes the analytical model obtained from the single-phase model neglecting the effect of water saturation. Springer Science+Business Media New York, 2015 fractal theory nationallicence microstructure nationallicence water saturation nationallicence gas slippage nationallicence tight sandstone nationallicence Lei Gang Key Laboratory for Petroleum Engineering of the Ministry of Education, China University of Petroleum, 102249, Beijing, China aut Dong Pingchuan Key Laboratory for Petroleum Engineering of the Ministry of Education, China University of Petroleum, 102249, Beijing, China aut Mo Shaoyuan Key Laboratory for Petroleum Engineering of the Ministry of Education, China University of Petroleum, 102249, Beijing, China aut Wu Zisen Key Laboratory for Petroleum Engineering of the Ministry of Education, China University of Petroleum, 102249, Beijing, China aut Chemistry and Technology of Fuels and Oils Springer US; http://www.springer-ny.com 51/3(2015-07-01), 268-279 0009-3092 51:3<268 2015 51 10553 https://doi.org/10.1007/s10553-015-0601-1 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10553-015-0601-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lei Gang Key Laboratory for Petroleum Engineering of the Ministry of Education, China University of Petroleum, 102249, Beijing, China aut NATIONALLICENCE 700 1- Dong Pingchuan Key Laboratory for Petroleum Engineering of the Ministry of Education, China University of Petroleum, 102249, Beijing, China aut NATIONALLICENCE 700 1- Mo Shaoyuan Key Laboratory for Petroleum Engineering of the Ministry of Education, China University of Petroleum, 102249, Beijing, China aut NATIONALLICENCE 700 1- Wu Zisen Key Laboratory for Petroleum Engineering of the Ministry of Education, China University of Petroleum, 102249, Beijing, China aut NATIONALLICENCE 773 0- Chemistry and Technology of Fuels and Oils Springer US; http://www.springer-ny.com 51/3(2015-07-01), 268-279 0009-3092 51:3<268 2015 51 10553