Wax, resin and asphaltene organic scale cleaning agent

Abstract

The invention discloses a wax, resin and asphaltene organic scale cleaning agent. The cleaning agent is composed of an oil soluble surfactant and an aromatic hydrocarbon solvent composed of aromatic hydrocarbons. The mass percentage content of the oil soluble surfactant is 1%-5%, the mass percentage content of the aromatic hydrocarbon solvent is 95%-99%, the oil soluble surfactant is composed of a pure substance of any one of OP-10 and alkylbenzene sulfonate or a mixture of OP-10 and alkylbenzene sulfonate through any combination mode in any proportion, and the aromatic hydrocarbon solvent is composed of a pure subst through any combination mode in any proportion ance of any one of methylbenzene, dimethylbenzene, trimethylbenzene and tetramethylbenzene or a mixture of the above four substances. The cleaning agent can organic scales formed by clean wax, resin and asphaltene through adhesion effectively, the organic scale removing speed is fast, the cost is low, and the speed of dissolving organic scales is slightly affected by asphaltene content increase. The problem can be solved that conventional wax cleaning agents only can dissolve wax but cannot dissolve resin and asphaltene.

Description

technical field [0001] The invention relates to an oilfield chemical descaling agent, especially an agent for removing wax, colloid and asphaltene organic scale. Background technique [0002] Crude oil contains waxes, gums, and asphaltenes to varying degrees. Wax is a white or light yellow solid composed of higher alkanes with a melting point of 37°C to 76°C. Paraffin wax is dissolved in petroleum in the form of colloid in the ground, and can be separated out from petroleum when the pressure and temperature are lowered. Colloids refer to polycyclic aromatic hydrocarbon compounds containing oxygen, nitrogen, sulfur and other elements with a relatively large molecular weight (300-1000) in crude oil, which dissolve in crude oil in the form of semi-solid dispersion. Asphaltene is a black solid substance with a higher relative molecular mass (greater than 1000) and a polycyclic structure. The presence of gum and asphaltenes in petroleum affects the initial crystallization temp...

AI Technical Summary

Problems solved by technology

The existing conventional wax scavenger not only cannot effectively remove the organic scale formed by the attachment of wax, colloid, and asphaltene on the pipe wall, but also with the increase of the asphaltene content, the wax removal effect of this conventional wax scavenger will change. It is getting worse and worse, the rate of removing organic dirt is slow, and the cost is high