METHOD FOR COMPLEX CONTROL OF CHARACTERISTICS OF WATER-OIL MIXTURE IN DYNAMIC STATE Russian patent published in 2024 - IPC G01N24/08 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the field of oil and gas industry and can be used for conducting the process mode of intra-field pumping of water-oil mixture. Method for complex control of characteristics of water-oil mixture in dynamic state consists in determination of characteristics of water-oil mixture in dynamic state, at which onset of inversion phenomenon is possible. Method is characterized by the fact that it includes an algorithm for calculating the characteristics of a water-oil flow in a dynamic state, according to which the structure of the water-oil mixture is successively determined, type of water-oil mixture, its density, viscosity of mixture depending on flow structure, average flow rate, hydrodynamic flow mode, characterized by Reynolds criterion, coefficient of hydraulic resistance depending on value of Reynolds criterion. Obtaining these values of the characteristics of the water-oil mixture is carried out, according to the control scheme, using a measuring installation at the cluster site with a multiphase gamma-meter flow meter installed on the liquid line, and with in-line rotary viscometer at the inlet or outlet of the measuring apparatus. After that, in the information processing device, based on the received data and the performed calculations, the moment of the onset of the phase inversion phenomenon is determined, which is characterized by a certain range of water content, viscosity and hydrodynamic mode, in which there is a maximum jump in the coefficient of hydraulic resistance. Taking into account the data on the onset of said moment, the water cut of the mixed flows of the water-oil mixture coming from the production wells to the cluster site is adjusted by redirecting the flows for selective mixing, at which the value of the final water cut of the mixed flow will be outside the calculated range of water cut, at which the inversion phenomenon occurs, which ensures stable maintenance of the pumping process mode.

EFFECT: increased stability of the process inside the field transfer.

1 cl, 6 dwg