FIELD: wells research.
SUBSTANCE: invention relates to the field of research of vertical, horizontal and inclined wells, in particular to methods for determining the flow rate and total fluid flow rate in wells, and can be used for geophysical support of the development of oil fields, monitoring the technical condition of the well, as well as for monitoring the total flow rate of fluid in main pipelines. According to the method, artificially hydrodynamic resistance to the flow is created by means of a packer in the composition of the downhole tool, which provides partial overlap of the inner section of the wellbore. The value of the pressure drop across the packer is measured using pressure sensors of the downhole tool, and the measurement of the pressure drop across the packer when the downhole tool moves with positive acceleration is carried out when its speed changes from zero to the maximum possible for a given geophysical lift. When the maximum speed is reached, the downhole tool is moved with negative acceleration until it stops completely, while simultaneously measuring the pressure drop across the packer. The values of the speed of the device is determined corresponding to the zero value of the pressure drop across the packer with the subsequent calculation of the flow rate according to the dependence Vf = (ΣVdv-i)/n, where Vf is the fluid flow rate, Vdv-i is the value of the device velocities at which the pressure drop across the packer is zero, n is the number of points with zero pressure drop recorded during the measurement, i=1…n.
EFFECT: invention reduces operating costs and improved accuracy in determining the flow rate and total fluid flow rate.
1 cl, 2 dwg
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Authors
Dates
2021-07-14—Published
2020-11-23—Filed