A device for measuring the settling rate of proppant

Abstract

Provided herein is a proppant settling rate measuring device, the method comprising: a first measuring cylinder, a second measuring cylinder, a power device and a differential pressure measuring device, wherein the first measuring cylinder and the second measuring cylinder are closed structure; the first measuring cylinder is used for accommodating the power equipment and is rotated under the driving of the power equipment; the second measuring cylinder is used for accommodating the first measuring cylinder and the sand mixing liquid, the first measuring cylinder The rotation of the cylinder makes the sand mixing liquid generate a shear rate; the differential pressure measuring device is arranged on the second measuring cylinder and is used to measure the differential pressure signal between the predetermined distances in the second measuring cylinder, and the measured differential pressure signal is Sent to a signal acquisition device to calculate the proppant settling rate from the differential pressure signal. This embodiment can measure the proppant settling velocity when the shear velocity changes, which improves the accuracy of the proppant settling velocity calculation. Further, it also provides a more accurate theoretical basis for the movement of the proppant in the vertical direction.

Description

technical field [0001] This paper relates to the field of proppant, in particular to a device for measuring the settling rate of proppant. Background technique [0002] With the advancement of multi-stage hydraulic fracturing, the oil and gas production of unconventional reservoirs has also increased substantially in recent years. Hydraulic fracturing is a technique that uses high pressure to form fractures in the formation and injects proppant into them during the formation and propagation of the fractures. The migration distance and propping height of the proppant in the fracture determine the conductivity of the fracture, which also determines the productivity of the reservoir. Therefore, it is necessary to explore the settlement and migration law of the proppant in the fracture. At present, the settling rate of proppant is investigated under laboratory conditions, and generally smooth glass tubes are used to simulate the settling in unbounded fluids. [0003] The study...

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Problems solved by technology

[0004] The proppant settlement test device used in the prior art can only measure the settling rate of the proppant under the condition of static no shear rate, but in fact, the shear rate changes dynamically. Therefore, the proppant settlement rate measured by the existing proppant settlement test device Inaccurate problem with agent settling rate

[0005] In order to solve the problem of inaccurate detection of the existing proppant sedimentation velocity, the first aspect of this paper provides a proppant sedimentation velocity measurement device, including: a first measuring cylinder, a second measuring cylinder, power equipment and a differential pressure measuring device, wherein , the first measuring cylinder and the second measuring cylinder are closed structures;

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