Verification of Coupled Hydraulic Fracturing Simulators Using Laboratory-Scale Experiments

摘要: In this work, we aim to verify the predictions of numerical simulators, which are used for designing field-scale hydraulic stimulation experiments. Although a strong theoretical understanding process has been gained over past few decades, fracture propagation in low-permeability rocks still remains challenge. Against background, performed controlled laboratory-scale fracturing experiments granite samples, not only provides high-quality experimental data but also well-characterized set-up. Using pressure responses and final sizes as benchmark, compared two coupled simulators—CSMP GEOS. Both simulators reproduced behavior by implementing physics Linear Elastic Fracture Mechanics (LEFM) lubrication theory within reasonable degree accuracy. The simulation results indicate that even very low-porosity (1–2 %) ( $${10}^{-18}\ {\mathrm{m}}^{2}- {10}^{-19}\ {\mathrm{m}}^{2}$$ ) crystalline rocks, usually target EGS, fluid-loss into matrix unsaturated flow impacts formation breakdown post-breakdown trends. Therefore, underestimation such parameters modeling can lead significant pressure. importance wellbore solvers considering effect system compressibility drop due friction injection line. varying rate result decompression at instant initiation affects size, while entry connection between well initial notch may cause an increase measured