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Matrix acidizing operation is one of the popular methods of well stimulation in the oil and gas industry which is used to remove near wellbore damage, increase the permeability, hence improve the production rate from the formation. Hydrochloric acid is used in the carbonate reservoirs to remove formation damage and create wormhole deep in the rock. It has been shown that with the proper operating design, significant improvement in the production rate can be obtained. A successful acid operations involves the proper selection of the candidate wells, identify the type of formation damage, stimulation method selection, correct design acidizing scenario, implementation of the technique and... 

Carbonate Matrix acidizing in order to improve or increase initial permeability, leads to different dissolution patterns under different operating and environmental conditions. In a specific rock / reactive fluid system, when a reactive fluid injects into the system in an optimal velocity, the dissolution pattern proceeds like a finger, names Wormhole. Formation of Wormhole is known as a success in acidizing process, because of its optimum porosity and permeability evolution and minimum pore volume injected of reactive fluid to breakthrough. So prediction of optimum injection velocity and analysis of dissolution patterns variation by change in operational and environmental conditions,... 

In this work, an improved model for simulating carbonate core acidizing, with the ability of correctly modeling fluid diversion in dual-core experiments is created based on an existing two-scale continuum model. The improvements are applied on the momentum transfer equation, continuity equation, pore-scale structure-property relations and fluid rheology model. Also a more realistic injection scenario and geometry configuration are presented for simulating the diversion experiments. The Darcy-Brinkman-Stokes equation is implemented instead of Darcy’s equation and the continuity equation is modified by adding the mass source term. A global rheology model is developed capable of capturing exact... 

Any reduction in permeability around the well is referred to as formation damage. After drilling operations are completed, various types of tests and logging are conducted. If formation damage is detected, it is typically remedied through acidizing. In carbonate reservoirs, acid is used to dissolve the rock, creating wormholes that bypass the damaged zone. However, it is important to note that in carbonate reservoirs, even in the absence of formation damage, acidizing can increase the productivity index (PI) by up to 50%. A thorough understanding of the mineralogy is necessary for effective acidizing. Generally, chemical analysis requires consideration of parameters such as acid additives,... 

Acidizing is one of the common methods of stimulating the well to remove formation damage and Skin factor. In carbonate reservoirs, hydrochloric acid creates permeable channels called wormholes due to the reaction with the porous medium. Previous researches have studied the effect of the main rock and fluid parameters (temperature, pressure, type and concentration of acid and rock lithology) at the core scale. However, wellbore scale will different from core scale due to the difference in the wormhole density, the flow geometry, the amount of acid leakage from wormhole wall and competition. Very limited models predict these effects for large scales. In this research, the geometry of linear... 

Acidizing is a widely used well stimulation technique designed to mitigate formation damage and enhance oil and gas production. The effectiveness of acidizing operations relies on meticulous design. Consequently, before implementation, it is essential to create an optimal operational plan using suitable laboratory tools and numerical methods to maximize efficiency. Numerous studies have been conducted to investigate and model wormhole propagation in carbonate rocks, including commonly used two-scale continuum models. Although these models effectively predict physical behavior, the numerous parameters involved complicate history matching with laboratory results, potentially leading to...