TY JOUR TI Smoothing of production time series in data preparation for a reservoir simulation model KW time series smoothing KW reservoir pressure KW productivity index KW Hampel filter KW mathematical statistics KW data preparation KW reservoir simulation model KW data screening KW outlier detection JO Vestnik AGGE AU Mavlyavov, I.R. AU Fayzrahmanov, G.G. AU Emelyanov, V.V. PY 2026 IS 0 PB Association of Geologists, Geophysicists and Engineers