TH69759A - Mixtures and methods for the treatment of underground rock formations. - Google Patents

Abstract

DC60 (13/07/47) Fluid Acquisition for Oil Practice with chelating actuators and HF sources are described. This fluid is effective at dissolving silica-like materials such as clay and preserving it. Material dissolved in solution Be specific The fluid is effective at preventing Precipitation of the original dissolved silicon, as is silica And hence reduce the damage of Sandstone through which the fluid touches A method has been assigned for the use of this fluid for the Stimulate a matrix of sandstone Removal of clay drilling fluid components and Filtration from borehole Sandstone acid cracking And cleaning The part is packed with gravel and the part is packed with propants. Liquid actives for oil practices with chelating agents and HF sources are described. This fluid is effective at dissolving velika materials such as clay and preserving it. Material dissolved in solution Be specific The fluid is effective at preventing Precipitation of the original dissolved silicon, as is silica And hence reduce the damage of Sandstone through which the fluid touches A method has been assigned for the use of this fluid for Stimulate a matrix of sandstone Removal of clay drilling fluid components and Filtration from borehole Acid cracking of sandstone And cleaning The part is packed with acid and part is packed with prop

Claims (9)

1.Aqueous fluid for oil treatment with a pH between 3 and 7, the fluid contains dissolved ammonium bifluoride in amounts from 0.5 to 6 percent by weight, the amount of boric acid is between 1 percent by weight and 6 percent by weight, preferably between 2 percent by weight and 4 percent by weight and preferably between 2.5 percent. By weight and 3.5% by weight, and from 12 to 40% by weight of dissolved chelating acid, where the lock of the stability constant The first value of the chelating acid with aluminum ions is greater than 5. 2. Fluid Acquies for oil treatment of claim 1, where the acid for Delets were selected from a group containing Maliic acid, Tartaric acid, Citric acid, Nitrile acid. Triacetic acid, hydroxyethyl aminodiacetic acid, hydroxyethyl ethylenediaminetetraacetic acid, ethylene acid Anhydrous tetraacetic, cytolhexylenediaminetetraacetic acid, diethylene acid Triamine pentacetic, ammonium salts of those acids, lithium salts of those acids, sodium salts of those acids. And mixtures of those acids 3. Fluid actives for the oil practice of claim 2, where the acid for Delate is diammonium ethylenediaminetetraacetic acid. 4.Aqueous fluid for the oil practice of claim 3, where diammonium ethylene diamanteteracetic acid is between 17 and 30 percent. by Weight, preferably between 20 and 25 percent by weight. 5. Fluid Acquisition for oil treatment of claim 1, where PH has been The adjustment to be between 5 and 7, preferably between 5 and 6.5. 6. The Accueuse fluid for oil treatment of claim 5, where PH will receive Modulation with bases selected from a group containing ammonium salts, ammonium hydroxide and amines with the formula R1R2R3N, where R1, R2 and R3 were selected from the alkali group. L with atoms Of carbon from one to 4 atoms, CH2CH2OH and H 7. Fluid Acquies for Oil Treatment of Clause 5, where PH will receive. Acid-based adjustments that were selected from a group containing HCl, formic acid And acetic acid 8.Aquatic fluid for oil treatment of claim 1, where ammonium is present. Bifluoride is between 0.5 and 6% by weight, and the preferred is between 1 and 5% by weight, the most preferred is between 1 and 2% by weight. 9. Fluid Acquies for Oil Treatment of Clause 1, which includes Further with the co-solvent 1 0. Fluid Acquisition for Oil Treatment of Clause 1, which includes Continue with surfactants