Guanidyl disinfecting anti-scaling inhibitor for oilfield water reinjection

Abstract

The invention provides a guanidyl disinfecting anti-scaling inhibitor for oilfield water reinjection. A production method includes: 1) mixing 100 parts by weight of guanidine hydrochloride and 120-180parts of amine to allow reacting at 80 DEG C, stirring while heating, holding the temperature of 80 DEG C, continuing to stir to allow reacting for 2 hours so as to synthesize aminoguanidine hydrochloride; 2) cooling the aminoguanidine hydrochloride to normal temperature, adding 200-300 parts by weight of water, adding 1-5 parts by weight of a surfactant, and stirring and dissolving to generate aminoguanidine hydrochloride solution; 3) allowing the aminoguanidine hydrochloride solution to react with 1-20 parts by weight of an acid to generate a finished functional guanidine hydrochloride solution, namely the guanidyl disinfecting anti-scaling inhibitor for oilfield water reinjection. The guanidyl disinfecting anti-scaling inhibitor for oilfield water reinjection has the advantages that the inhibitor has high antibacterial activity, broad-spectrum disinfecting performance, is especially efficient to kill sulfate-reducing bacteria, saprophytic bacteria, iron bacteria and the like in oilfield water, and can also remove scaling matters in the oilfield water and water scale generated on the inner wall of a duct.

Description

technical field [0001] The invention belongs to the field of bactericidal, scale, and corrosion inhibitors for oilfield reinjection water, and in particular relates to a guanidine-based bactericidal, scale, and corrosion inhibitor for oilfield reinjection water. Background technique [0002] Oilfield reinjection water is a large amount of sewage reinjected into the oil well during the secondary oil recovery of the oilfield. These reinjected sewage are generally treated oilfield sewage, but still have a certain degree of salinity and a certain amount of sulfate reducing bacteria and saprophytic bacteria. Microorganisms such as bacteria and iron bacteria, the growth, metabolism and reproduction of these microorganisms cause corrosion of metal pipelines, affecting the normal use of oilfield pipelines and causing huge economic losses to oilfield production. At present, there are many types of fungicides, but many fungicides cannot be widely used in oil fields due to the high cos...

AI Technical Summary

Problems solved by technology

[0002] Oilfield reinjection water is a large amount of sewage reinjected into the oil well during the secondary oil recovery of the oilfield. These reinjected sewage are generally treated oilfield sewage, but still have a certain degree of salinity and a certain amount of sulfate reducing bacteria and saprophytic bacteria. Microorganisms such as bacteria and iron bacteria, the growth, metabolism and reproduction of these microorganisms cause corrosion of metal pipelines, affecting the normal use of oilfield pipelines and causing huge economic losses to oilfield production

At present, there are many types of fungicides, but many fungicides cannot be widely used in oil fields due to the high cost of use. Now the commonly used oil field fungicides are mainly quaternary ammonium salts. After many years of continuous use, oilfield reinjection water Many of the bacteria in it have developed resistance to it, making the dosage of the agent more and more large, but the effect is getting worse and worse. Therefore, the sterilization treatment of oilfield reinjection water in my country is faced with low sterilization efficiency of fungicides, high cost of use, and resistance to bacteria. Major issues such as medicinal properties