A device and method for evaluating sand-carrying effect of fracturing fluid

Abstract

The invention discloses a fracturing fluid sand carrying effect evaluation device which comprises a fracturing fluid kettle. An outlet of the fracturing fluid kettle is sequentially connected with a first screw pump, a sand mixing stirring kettle, a second screw pump, an electromagnetic flowmeter and a vertical shaft inlet. A sand adding device is installed at the inlet above the sand mixing stirring kettle. An outlet of the vertical shaft outlet is connected with three branches at the same time. The first branch is sequentially connected with a fifth valve, a fracture sedimentation model and a sixth valve. The second branch is sequentially connected with a seventh valve, a first horizontal shaft and an eighth valve. The third branch is sequentially connected with a ninth valve, a horizontal shaft fracture model and a tenth valve. The three branches are connected with a temperature sensor and a sedimentation tank inlet in sequence after intersecting. The sedimentation tank outlet is connected to a fracturing fluid kettle inlet to form a loop. The invention further discloses a method for testing and evaluating the sand carrying effect of various fracturing fluids in a vertical shaft, a horizontal shaft, a single crack and a horizontal well complex crack under different supporting agent types and conditions, and meanwhile testing friction of the sand carrying fluids in different shaft or crack sections under different conditions.

Description

technical field [0001] The invention belongs to the technical field of fracturing, and relates to a device and method for evaluating the sand-carrying effect of fracturing fluid. Background technique [0002] With the large-scale development of tight and low-permeability oil and gas reservoirs, hydraulic fracturing technology has become an important technical means for oil and gas reservoir stimulation and development. During the fracturing process, fracturing fluid is mainly used to carry proppants into fractures. Capable of forming highly conductive proppant fracture channels within the reservoir. The sand-carrying ability of the fracturing fluid is very important to the flow state of the sand-carrying fluid in the wellbore and fractures, as well as the form of proppant laying in the fractures. It directly affects the conductivity and shape of artificial fractures, and then affects the reservoir performance. Transform volume and capacity. Therefore, it is very important ...

AI Technical Summary

Problems solved by technology

[0003] At present, the actual investigation has found that the general experimental devices for evaluating the sand-carrying effect of fracturing fluids are mostly single fractures or vertical wellbore fracture models, and there is no horizontal well fracture model, which does not consider fractures at various angles near the wellbore, perforation phase angle, The influence of factors such as pore size and pore density on the sand-carrying effect of fracturing fluid. In addition, the surface roughness of the fracture model in some experimental devices does not match the surface roughness of the actual formation fracture, which will affect the final evaluation results

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