METHOD OF DETERMINING PHASE FLOW IN OIL PRODUCING WELLS Russian patent published in 2016 - IPC E21B47/10 

FIELD: oil industry.

SUBSTANCE: invention relates to oil industry and can be used to determine phase flow rates in vertical and inclined wells of oil and gas deposits. Method involves determination of section of well bore, where it is necessary to provide for measurement of flow rate of component. Lowering of housing with measuring elements on selected section. Implementation of flow rate measurement in well by means of parameters measuring elements. Formation and removal of electric signal. Oil and water density is measured, for example, at the selected at wellhead samples; determining composition of oil gas, molar mass M_g,i and mass fraction of component k_g,i in it. Determining molar mass M_g and specific gas constant. Temperature of well product in the section is determined, where there is housing with measuring elements, calibration sensors are placed on rigid, or partially flexible or flexible housing. Gas density ρ_g on selected area. Flow section area of well at location of full pressure sensor S. Measurement of full pressure flow of well products at any section of well, straight or curved, is carried out along its axis in direction towards flow. Measurement of static pressure of flow is carried out in two or more points located on housing through equal or unequal distances, wherein distance between points of measurement of static pressure can be varied. Distance is measured between points of measurement of static pressure h and inclination angle of well shaft δ between points of measurement of static pressure. Measured data are transmitted in formation and removal of electric signals unit. Density water-oil and gas flow ρ_cm as ratio of static pressure difference between points to product of free fall acceleration (g) to distance between these points. Determining volume concentration of gas in gas mixture, for example from change in density of gas mixture. Dynamic head flow Δp is defined as difference between total pressure and static pressure, measured in one of points. Determining volume flow rate of gas mixture using formula: determining water content of water-oil emulsion by formula: where: ρ_n and ρ_b -oil and water density;α_g -volume fraction of crude oil-dissolved gas.

EFFECT: technical result consists in improvement of efficiency of determining phase flow in oil producing wells.

2 cl, 1 dwg