Treatment agent of hydrogen sulfide oil displacement, catalysis, viscosity reduction and reduction of steam flooding injection well and application

Abstract

The invention provides a treatment agent of hydrogen sulfide oil displacement, catalysis, viscosity reduction and reduction of steam flooding injection well and an application, the treatment agent comprises: nickel nitrate, sodium hydroxide and a high temperature resistance non-sulfur containing fluorine carbon surfactant, wherein nickel nitrate is taken as an oxidizing agent, the valence of sulfur is increased, the hydrogen sulfide can not be generated; sodium hydroxide is used for stabilizing the sulfur with increased valence, the reaction for inhibiting hydrogen sulfide is inreversible, thereby the inhibition of hydrogen sulfide generation in an oil layer can be realized; and the high temperature resistance non-sulfur containing fluorine carbon surfactant is played as the oil displacement and viscosity reduction effects. The invention also provides an application of the treatment agent for generating hydrogen sulfide used in the oil layer in the steam flooding injection well, in the process of steam flooding, the treatment agent is injected into a ground layer with steam, the generation of hydrogen sulfide in the oil layer can be inhibited from source, and the hydrogen sulfide damage can be reduced and the effects of oil displacement and viscosity reduction can be provided simultaneously.

Description

technical field [0001] The present invention relates to a treatment agent for catalytic viscosity reduction and hydrogen sulfide reduction in steam flooding injection wells and its application, in particular to a treatment agent for steam flooding injection wells to reduce hydrogen sulfide in formations and has three effects of oil displacement catalytic viscosity reduction at the same time An integrated chemical treatment agent, and a method for using the treatment agent to reduce hydrogen sulfide in formations and to catalyze viscosity reduction in oil flooding. Background technique [0002] Hydrogen sulfide is a colorless gas with a specific gravity of 1.1895, which is heavier than air. At room temperature, the solubility of hydrogen sulfide in water is 3.864g / L, and the solubility in oil is 3.3g / L. The solubility is even greater under high pressure. When people inhale high concentration (1500mg / m 3 above), the poisoned person will quickly lose consciousness, accompanied...

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Problems solved by technology

However, the disadvantage of this method is that the formed metal sulfide may affect the storage performance of the reservoir, etc.

[0010] However, the methods for controlling hydrogen sulfide in oil wells recorded in the above-mentioned prior art all focus on "control". At present, there is no method to suppress the production of hydrogen sulfide from the source of the crude oil extraction process, so that hydrogen sulfide cannot be generated in the oil layer.

Moreover, most of the oil displacement agents used for steam flooding are sulfonates, which increase the possibility of producing hydrogen sulfide in oil layers; most of the oil displacement agents used for catalytic viscosity reduction in oil layers are single-effect organic nickel and inorganic transition metal salts

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