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GEOLOGICAL AND MINERALOGICAL SCIENCES

INFLUENCE OF THERMOBARIC CONDITIONS ON THE PROPERTIES OF TECHNOLOGICAL FLUIDS AND REACTION PRODUCTS DURING ACID TREATMENT OF CARBONATE RESERVOIRS

Samatov Sherzod Samatov S. Boyqobilova Mahliyo Boyqobilova M. Bozorov Ulugbek Bozorov U. Ahatova Guliza Ahatova G. Ismatova Shirina Ismatova S.

Abstract

This article analyzes the effect of pressure (0.1 – 100 MPa) and temperature (20 – 250°C) on the properties of technological fluids (HCl, water) and reaction products ( 𝐶𝑎𝐶 𝑙 2 , 𝑀𝑔𝐶 𝑙 2 , 𝐶 𝑂 2 , 𝑁 2 ) during acid treatment of carbonate reservoirs. Studies show that under deep reservoir conditions, gases transition to a supercritical state, salt solubility increases, and acid viscosity decreases significantly. Considering these changes allows for increasing the efficiency of acid stimulation and correctly modeling the development of wormholes.

Keywords

carbonate reservoir acid treatment thermobaric conditions hydrochloric acid phase state viscosity density.

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