FIELD: oil industry.
SUBSTANCE: method includes taking sample of water-oil-gas mixture in hermetic tank, exposure thereof and measurement of hydrostatic pressure P1. after exposure and forming of oil-water boundary water is let out and hydrostatic pressure P2 is measured again when oil-water boundary reaches bottom of tank, and mass concentration of water W is determined from formula W=(1-P2/P1). Device has hermetic tank with inlet and outlet branch pipes, temperature detectors and hydrostatic pressure detectors, relay detector of oil-water joint position mounted near tank bottom and blow branch pipe with valve for forcing liquid phase from tank by gas.
EFFECT: higher precision.
2 cl, 2 dwg
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