摘要:
The present invention relates to acidic aqueous solution containing a chelating agent, an acid, and an additive, wherein the chelating agent is glutamic acid N,N-diacetic acid (GLDA) or a salt thereof, wherein the amount of GLDA or the salt thereof is at least 10 wt% and up to 60 wt%, based on the weight of the aqueous solution, wherein the acid is selected from hydrochloric acid, hydrobromic acid, hydrofluoric acid, hydroiodic acid, sulfuric acid, nitric acid, phosphoric acid, formic acid, acetic acid, citric acid, lactic acid, malic acid, tartaric acid, maleic acid, boric acid, hydrogen sulfide, and wherein the additive is selected from the group of surfactants, wetting agents, and emulsifiers
摘要:
A synthetic acid composition for use in oil industry activities, said composition comprising: urea and hydrogen chloride in a molar ratio of not less than 0.1:1; and an amino acid, and optionally, a phosphonic acid derivative.
摘要:
The present disclosure relates generally to a composition comprising a low molecular weight graft polymer. The graft polymer is a graft homopolymer, copolymer or terpolymer. Additionally, the present disclosure relates to a scale inhibitor composition comprising the low molecular weight graft polymer. Furthermore, the present disclosure relates to a process for preventing the deposition of scale from water or aqueous solution and a method for scale inhibition treatment of an oil or gas production well by using the low molecular weight graft polymer. The scale inhibitor is low corrosive for application in the oilfield.
摘要:
A synthetic acid composition for use in oil industry activities, said composition comprising: urea and hydrogen chloride in a molar ratio of not less than 0.1:1; and a metal iodide or iodate. Optionally, a phosphonic acid derivative may be added.
摘要:
A synthetic acid composition for use in oil industry activities, said composition comprising: urea and hydrogen chloride in a molar ratio of not less than 0.1:1; and an amino acid, and optionally, a phosphonic acid derivative.
摘要:
A method is disclosed to inhibit scale formation in aqueous systems whereby a threshold amount of a scale inhibiting agent, represented by an aminoacid alkylphosphonic acid, is added to the aqueous system. The aminoacid moiety can be represented by α-species or by species having, at least, two or more carbon atoms between the carboxylic moiety and the amine group. These aminoacid based inhibitors exhibit unusually superior performance and system acceptability compared to leading state-of-the-art inhibitors.
摘要:
Methods and systems for infusing ceramic proppant and infused ceramic proppant obtained therefrom are provided. The method can include introducing ceramic proppant and a chemical treatment agent to a mixing vessel, mixing the ceramic proppant and the chemical treatment agent in the mixing vessel to provide a mixture, introducing microwave energy to the mixing vessel to heat the mixture to a temperature sufficient to produce infused ceramic proppant containing at least a portion of the chemical treatment agent, and withdrawing the infused ceramic proppant from the mixing vessel.
摘要:
The present invention relates to an asphaltene-dissolving oil-external emulsion for acidization and methods of using the same. In various embodiments, the present invention provides a method of treating a subterranean formation, including obtaining or providing an oil-external water-internal emulsion. The emulsion includes an asphaltene-dissolving composition, emulsifier, and aqueous acid. The method also includes placing the composition in a subterranean formation downhole.
摘要:
Stable water based High-Temperature-High-Pressure (HTHP) and/or Non-HTHP crosslinked copolymers for oil and gas applications consist of (i) a crosslinked, linear polyvinyl amide/polymerizable carboxylic acid) copolymer, having a composition, by weight, of 25-75 wt. % of a vinyl amide monomer selected from vinyl pyrrolidone, vinyl caprolactam, N-vinyl-N-methylacetamide and mixtures thereof, and 25-75 wt. % of a polymerizable carboxylic acid monomer selected from acrylic acid, (meth)acrylic acid, crotonic acid, itaconic acid, maleic acid and mixture thereof; and (ii) a crosslinker in an amount of 0.01-5% based on weight of total monomers. Also discloses relevant compositions comprising said copolymer and method of use thereof.