a mini-review on the studies done on the acidification of carbonate rock matrix

In the present study, a review of the studies conducted regarding acidification of carbonate rock matrix has been done. one of the main and important problems in the oil industry is the low yield of oil and gas wells due to damage to the formation, or unfavorable characteristics of the formation, including low permeability. the main purpose of matrix acidification is to stimulate the reservoir to remove the flow obstacles of oil and gas production fluids. in carbonate reservoirs, due to the heterogeneity, the complexity of the cavity system and their specific materials, the acidification process faces important challenges for oil and gas production. homogeneous and appropriate distribution of injected acid in the target area, especially in horizontal and deviated wells, is a major challenge in the design of the acidification process. deviation of acid flow in carbonate and sandstone reservoirs is more complicated due to their high reactivity with injected acid. the review of the existing studies showed that the increase in permeability occurred with the formation of a dominant cavity and performing acid treatment with 28% hcl acid, the total pressure drop decreased and the permeability and finally the production rate increased significantly. likewise, the radius of the wormhole decreases with higher the tank temperature. the reason for this reduction is that with the increase in temperature, the speed of the reaction and thus the ability of the acid to react with the stone increases.