TY JOUR TI Impact of Oil-Based Mud with Barite Weighting on DAFNA Formation Tester Transmitters KW hard-to-recover oil and gas reserves KW hydrodynamic logging and reservoir fluid testing KW density KW viscosity KW optical density KW pressure KW temperature KW barium sulfate. JO Vestnik AGGE AU Gallyamov, S.R. AU Titorov, M.Y. AU Kuznecov, D.A. AU Sayapov, D.V. AU Islamov, L.I. AU Mitkov, M.S. PY 2026 IS PB Association of Geologists, Geophysicists and Engineers