Abstract
A method for acid treatment of the bottom zone of a terrigenous heterogeneous reservoir, including isolation of highly permeable reservoir areas with a foam solution formed in the reservoir and subsequent treatment of low-permeability reservoir zones with an organic acid systemhas been developed. The composition of the organic acid system is selected depending on the carbonate content of the bottom well area. The efficiency of the method is increased by increasing the foam system stability, the depth and thickness coverage of the formation, and by reducing corrosion activity as a result of the use of organic acid systems. As carbonate rocks dissolve, the reservoir and filtration characteristics of the formation will increase. Keywords: acid treatment; citric acid; whey; polymer; crosslinker; foam system; stability; carbonate content; permeability.
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