Simulation of hydraulic-mechanical-chemical coupled acid fracturing of rock with lattice bonds

• DOI: 10.1016/j.heliyon.2024.e26517
• Publication Date: 2024-02-15T17:01:53Z
• Authors: Tianci Zhu; Zhennan Zhang; Zhiyuan Liu; Na An; Xuanchun Wei
• Keywords: H1-99; Carbonate reservoir; Science (General); 0211 other engineering and technologies; Acid fracturing; Discretized virtual internal bond; 02 engineering and technology; Social sciences (General); Q1-390; Wormhole; Hydraulic-mechanical-chemical coupling; Research Article

The acid fracturing is a very important stimulation technique for carbonate reservoir. hydraulic-mechanical-chemical effect tightly coupled in this fracture process. In paper, the discretized virtual internal bond extended to simulate coupling process which rock matrix considered consist of many discrete cells with finite number bonds. Each taken as transport channel fluid, reaction site chemical dissolution and mechanical linkage. When fluid flows through bond, will be dissolved. As result, both porosity permeability are increased, properties weakened. By method, hydraulic, fields together on micro bond. acidization, chemical-induced weakening propagation can well reproduced. This method transforms complicated 3D multi-physical problem into 1D problem, significantly simplifies simulation multi-field It provides feasible approach HMC