| Geylani Panahov, Eldar Abbasov, Shahin Ismayilov, Ibrahim Mamedov Modelling of water-saturated formations insulation with gel-forming compositions |
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| Abstract. Oil reserves, the production of which was previously complicated for various technological reasons, are being involved in the development in order to restore the hydrocarbon resource base. In most cases, oil reserves are located in the rock matrix (blocks), while fluid flow is performed through a system of washed, heterogeneous zones. There are various reasons for watering of oil and gas wells, but two main factors can be highlighted. The natural cause is associated with water breakthrough into well perforation intervals and another problem is water overflows from above- or below-lying aquifers. One of the main ways to improve the efficiency of field development is isolation of water-conducting channels of reservoirs. The process of formation of a thickener slug in the formation due to chemical reaction between two sequentially injected chemical agents can be described within the framework of the theory of two-phase five-component flow. The paper proposes an appropriate mathematical model containing two blocks of equations: the first one is hydrodynamic, represented by equations and the second one is physico-chemical, including equations of chemical reaction between chemical agents, mass transfer of these reactants and thickener. The proposed model provides an opportunity to optimise the composition and injection volume of the isolation composition for each specific well required for effective water flow shut-off. |
| Keywords: heterogeneous; isolation; modeling; two-phase flow; cross-linking agent |
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| DOI: https://doi.org/10.54381/itta2024.36 |