Multiparametric measuring f ow complex for express control of oil quality by the method of proton magnetic resonance relaxometry

Observed the problems arising in the quality control of raw (oil-well liquid, crude oil and oil-water emulsions) quality in the processes of their production, preparation for transportation and convertion. Was shown, that existing instruments of the crude oil quality control have low accuracy and unsuffi cient speed of measurements of oil characteristics. To ensure the quality of oil and purity of the separated ballast water, their additional purifi cation is necessary. For the express control of characteristics (properties) of oil during mining and preparation for transportation, relaxometer of proton magnetic resonance and multiparametric fl ow measuring complex, including the system of representative sampling has been elaborated. Described the method of nuclear (proton) magnetic resonance relaxometry, сonstruction and algorithm of functioning for measurement complex, as well as the structure and work of proton magnetic resonance relaxometer. Were received equations, describing technical, electromagnetic and schemotechnik parameters of relaxometer. Performed the metrological tests of relaxometer, forming a part of measurement complex with the alternative control of crude oil samples properties by laboratory analytic methods. Were received the following characteristics of oil-well liquid, crude oil, oil-water emulsions and separated from oil stratum water properties: water concentration in the rang 0–100 % with the error ±1 % rel., concentration of salts in water in the range 0–10 g/l with error ±0.2 mg/l, mass concentrations of sulfur S in the range 0.1–8.0 % with error ±0.3 % rel., density ρ in the extended range 700–1100 kg/m3 with error ±1.47 kg/m3, kinematic viscosity in the range 0–350 mm2/s with error ±0,13 mm2/s in the oil samples. Presented measurement complex gives the opportunity for data verifi cation using several PMR-parameters. Elaborated сomplex can be used for control and management of oil mining multifunctional digital automated oil-well, installations for water separation from oil-water emulsions and sewage waters purifi cation. 

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