FIELD: oil and gas industry.
SUBSTANCE: intensification of the operation of injection and production wells, including in conditions of high reservoir temperatures, due to the combined action of the components used in the proposed composition, taken at the concentrations indicated below, providing optimal conditions under which the chelating agent is capable of both forming complexes with alkaline earth metal ions and conducting a proton attack on the crystal lattice calcium carbonate. Intensifying dry acid composition for high-temperature carbonate and mixed reservoirs contains, mol / l: chelating agent - disodium salt of ethylenediaminetetraacetic acid 0.1-0.7; pH regulator - sodium oxide hydrate or potassium oxide hydrate 0.1-0.7; citric, or tartaric, or succinic acid 0.01-0.05; ammonium chloride 0.01 - 0.1; fresh water - the rest is up to a liter.
EFFECT: invention enables to intensify the operation of the injection and production wells.
1 cl, 1 tbl, 16 ex
| Title | Year | Author | Number |
|---|---|---|---|
| INTENSIFYING COMPOSITION BASED ON SURFACTANTS AND COMPLEXING AGENTS FOR CARBONATE AND MIXED RESERVOIRS | 2022 |
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