Numerical Simulation Analysis of the Influence of Calcite Veins on Rock Mechanical Properties
This paper obtained the relationship between peak stress and Young's modulus with the inclination angle of calcite-filled joints through triaxial experiments,and based on digital images.The processing technology needs to consider conditions such as the heterogeneity of rock material parameters and the accuracy of primitive division.The real rock fracture analysis system RFPA2D was used for numerical simulation analysis.A sandstone model filled with calcite veins was constructed to explore the different growth angles of calcite veins and effects of width and rock sample heterogeneity on rock mass fracture patterns.The research results show that:the more the growth angle of calcite veins is closer to the direction of applied load,the larger the width,and the higher the heterogeneity,the lower the stability of the rock and the faster and more complete rupture;due to the Bashi in the Kelasu Tectonic Belt of the Kuqa Depression The Jiqike Formation reservoir has high density,large differences in burial depth,and strong heterogeneity.The fractures generated under the action of tectonic stress provide it with good oil and gas storage and transportation conditions.The fracture model obtained by numerical simulation reasonably explains the area of rich resources of oil and gas reservoirs.
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