Experimental device and method for carrying out simulation study on heat exchange and geometric structural evolution of foam fracturing fluid in fracture passage

Abstract

The invention discloses an experimental device and method for carrying out simulation study on heat exchange and geometric structural evolution of foam fracturing fluid in a fracture passage. The experimental device comprises a solution storage box, a gas cylinder, a foam generator, a fracture simulation device and a recorder, wherein the solution storage box is used for storing aqueous solution of a surfactant; the gas cylinder is used for storing and supplying gas for generating foam; the foam generator is used for generating the foam; the fracture simulation device is transparent; a passageis formed in the fracture simulation device and used for simulating a stratum fracture with heat flow; both a width and an inclination angle of the passage for simulating the stratum fracture are adjustable; a heating plate is arranged in the passage for simulating the stratum fracture; a plurality of thermocouples are arranged on the heating plate; and the recorder is used for recording data acquired by the thermocouples. The experimental device and method disclosed by the invention can simulate to carry out study on multi-phase flowing and convective heat exchange characteristics of the foam fracturing fluid with different parameters in the stratum fractures with different widths and inclination angles.

Description

Technical field [0001] The invention belongs to the technical field of oil and gas field development and the technical field of foam fluid simulation experiment research, and in particular relates to an experimental device and method for simulating and studying the heat exchange and geometric structure evolution of foam fracturing fluid in fracture channels. Background technique [0002] Foam is a highly concentrated dispersion of gas (dispersed phase) in liquid (continuous phase). Because of its light weight and large specific surface area, it is widely used in daily life and industrial production; including food, cosmetics, cleaning, Surface treatment, building materials, foam fractionation method to treat wastewater and remove heavy metals, and extraction of natural resources, etc. In addition, the water foam flow is used as a refrigerant in various types of heat exchangers. The heat transfer coefficient of the heating surface can be changed by changing the speed and mass frac...

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Problems solved by technology

At present, the understanding of the convective heat transfer and structure evolution mechanism of this complex heterogeneous foam fluid in formation fractures is not clear enough at home and abroad, and it is not possible to predict well when the foam fracturing fluid reaches the formation under heat transfer conditions. The multi-phase flow characteristics often lead to poor fracturing effect or even failure

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