Fracture flow simulation experiment device and method for fiber blend support agent

Abstract

The invention discloses a fracture flow simulation experiment device and method for a fiber blend support agent. The device comprises a fracture box body, wherein a primary fracture box body is fixedly arranged in the fracture box body; a fracture inlet is formed in the fracture surface of the primary fracture box body; the primary fracture box body is communicated with an injection pump through the fracture inlet; a working material liquid storage tank which stores working materials is connected to the upper part of the injection pump; a secondary fracture box body is arranged in the primary fracture box body; a hydraulic cavity liquid inlet and a hydraulic cavity liquid outlet are formed in the front part of a hydraulic cavity in sequence from top to bottom; the hydraulic cavity liquid inlet is connected with a hydraulic cavity injection pump and a hydraulic cavity working liquid storage tank through pipelines in sequence. The fracture flow simulation evaluation method for the fiber blend support agent comprises the following steps: inspecting and connecting the device; dosing; switching on the fracture closing pressure simulation device. According to the device, the motion process of the fiber blend support agent in a fracture can be really simulated, the operation is safe and simple, and the automation level and the result credibility are high.

Description

technical field [0001] The invention relates to a fibrous mixed proppant fracture flow simulation experiment device and method, belonging to the field of petroleum fracturing. Background technique [0002] Fiber technology was first applied to sand fracturing technology to solve the contradiction between rapid flowback and proppant reflux after oil and gas well pressure, that is, if the fluid drainage rate is too fast, it may exceed the critical sand flow rate, resulting in proppant regurgitation and fluid drainage. Too low a velocity will again result in increased drain time and reduced flowback rates. The fibrous material with certain flexibility is mixed with the sand-carrying fluid and injected into the formation at the same time to form a composite proppant in the artificial fracture. The proppant is the matrix and the fiber is the reinforcing phase. The addition of fibers can improve the sand-carrying capacity of the sand-carrying fluid, control the backflow of the pr...

AI Technical Summary

Problems solved by technology

In terms of experimental research on fiber fracturing technology, there are many studies on the static properties of fibers such as dispersibility, compatibility, sand suspension, and degradation at home and abroad, which can more directly and comprehensively reflect the distribution of fibers in fractures, temporary plugging, In terms of dynamic flow simulation of stable sand body characteristics, conventional pre-set fiber sand filling models or core splitting fracture filling fiber methods are often used for evaluation. The distribution pattern in the fiber fracturing field is far from the actual

The lack of indoor experimental simulation means makes the migration law and distribution shape of fibers and proppants in fractures cannot be displayed directly, but can only be guessed, and the reliability of the measured experimental results is poor, which hinders the further development of this technology

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