“…The application of artificial intelligence and soft computing for building intelligent methods in many industries has recently attracted much attention (Anitescu, Atroshchenko, Alajlan, & Rabczuk, 2019;Chuntian & Chau, 2002;Fotovatikhah et al, 2018;Guo, Zhuang, & Rabczuk, 2019;Moazenzadeh, Mohammadi, Shamshirband, & Chau, 2018;Taherei Ghazvinei et al, 2018;Yaseen, Sulaiman, Deo, & Chau, 2019). In petroleum and gas industries, intelligent models have been used to determine, oil and gas thermodynamic properties, reservoir formation properties and miscibility conditions required for gas injection processes (Dargahi-Zarandi, Hemmati-Sarapardeh, Hajirezaie, Dabir, & Atashrouz, 2017;Dashtian, Bakhshian, Hajirezaie, Nicot, & Hosseini, 2019;Hajirezaie, Hemmati, & Ayatollahi, 2014;Hajirezaie, Hemmati-Sarapardeh, Mohammadi, Pournik, & Kamari, 2015;Hajirezaie, Pajouhandeh, Hemmati-Sarapardeh, Pournik, & Dabir, 2017;Hajirezaie, Wu, Soltanian, & Sakha, 2019;Hemmati-Sarapardeh, Tashakkori, Hosseinzadeh, Mozafari, & Hajirezaie, 2016;Kamari, Pournik, Rostami, Amirlatifi, & Mohammadi, 2017;Kamari, Safiri, & Mohammadi, 2015;Rostami, Kamari, Panacharoensawad, & Hashemi, 2018). These models take both input and output values to get trained and later can make predictions.…”