This article introduces the FCA (Filtration Capacitive Analysis) software suite, designed for interpreting well test data from complex well configurations, including horizontal wells with multistage hydraulic fracturing (MSHF) in low-permeability reservoirs. The system employs a modular client-server architecture, ensuring scalability and reliability. The implemented numerical methods address key challenges in well test interpretation, such as data preprocessing with advanced filtering techniques (e.g., Kalman filter, Savitzky-Golay filter, and convolutional autoencoders) and solving the inverse problem using filtration-capacitance invariants and the superposition principle. Practical application results demonstrate FCA's effectiveness in estimating formation flow capacity properties and well parameters. Validation against industry-standard simulator KAPPA Saphir confirmed FCA's higher sensitivity to model correctness, reducing interpretation ambiguity and ensuring reliable industrial deployment.
Keywords: well test interpretation, low-permeability reservoir, filtration-capacitance analysis, inverse problem, software architecture, client-server, convolutional autoencoder, superposition principle, misfit minimization, multistage hydraulic fracturing
The paper analyzes and shows the inadequacy of the technology for repairing production wells by rolling out a corrugated metal patch with a dornating device, which consists in premature violation of the tightness of the well due to low strength of the connection. A technology and a hydromechanical device for additional fastening by radial extrusion of spherical cavities in the metal of the plaster are proposed. As a result, a drag force is generated in the cross-section of the fastener, which prevents shear loads from axial forces. Strength calculations have shown that for better performance of the metal patch, it is advisable to increase the shear resistance force by increasing the number of punches or technological transitions of fastening.
Keywords: casing, production string, well tightness, metal plaster, radial extrusion, strength