Double effects treatment agent of hydrogen sulfide reduction, catalysis and viscosity reduction in steam flooding injection well and application

Abstract

The invention provides a double effects treatment agent of hydrogen sulfide reduction, catalysis and viscosity reduction in a steam flooding injection well and an application, the treatment agent comprises: nickel nitrate and sodium hydroxide, wherein nickel nitrate is taken as an oxidizing agent, the valence of sulfur is increased, and the sodium hydroxide is reacted to sulfur with increased valence. The generated sulfurated nickel or nickel hydroxide has catalysis and viscosity reduction effects on thick oil under high temperature high pressure environment in an oil layer. The invention also provides an application of the treatment agent for reducing the hydrogen sulfide 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 hydrogen sulfide in the oil layer can be reduced, and the double effects treatment agent has catalysis and viscosity reduction effects on thick oil.

Description

technical field [0001] The invention relates to a double-effect treatment agent for reducing hydrogen sulfide and catalytic viscosity reduction in steam flooding injection wells and its application, in particular to a steam flooding injection well for reducing the generation of hydrogen sulfide in oil layers and having the effect of catalytic viscosity reduction A dual-effect chemical treatment agent, and a method for using the treatment agent to reduce the generation of hydrogen sulfide in oil reservoirs. 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 by violent convulsions, momentary breathing stop, and then...

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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.

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