METHOD FOR DETERMINATION OF OIL WELL YIELD ("WEIGHT INCREMENT") Russian patent published in 2010 - IPC E21B47/10 

FIELD: oil and gas production.

SUBSTANCE: invention refers to oil extraction and can be used for records management of oil well yields within pressure-sealed gathering systems. The method for determination of oil well yield involves hydrostatic pressure measurement when borehole fluid loading into a vertical cylindrical measuring reservoir (MR) with a collector-opened gas and closed drain fluid lines and fluid-based productivity calculation. Hydrostatic pressure measurement is performed on a linear section of the MR through periods not less than minimum hardwarily attainable for a specific device, but no more than one third of time of borehole fluid loading of the MR with maximum productivity for the given device. The values of hydrostatic pressure increment for these periods increased by the sectional area of the MR show the fluid-based well productivity. Duration of yield measurement process shall not exceed time derived from division of useful capacity of the measuring reservoir by the well productivity derived in the first correct measurement after loading of the measuring reservoir started. Thus, final well yield is determined as an average value of all measurements received on the linear section of the MR. Final well yield measurement time is determined by comparison of the previous measurement with the following one with the last correct measurement after loading of the measuring reservoir started is that one exceeding the following. If the MR has a nonlinear bottom, hydrostatic pressure is measured through periods not less than minimum hardwarily attainable for a specific device, but no more than one third of time of borehole fluid loading of the nonlinear bottom with maximum productivity for the given device. The first correct measurement after loading of the MR started is that one less than the previous and does not differ from the following within a device error.

EFFECT: ensured foaming resistance of measurements, reduced materials consumption and price of the device that implements this method.

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