USING RESPONSE SURFACE ANALYSIS TO ESTIMATE TIME OF THE GAS-WATER CONTACT LIFT IN YAMBURG GAS FIELD CONDITIONS Article Bacirheba M.J., Martial T.B.E., Abdugaforovich M.N., Ugli M.M.M. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences. Penerbit Akademia Baru. Vol. 87. 2021. P. 105-112