Paraffin remover and inhibitor and preparation method thereof

Abstract

The invention discloses a paraffin remover and inhibitor and a preparation method thereof.The preparation method comprises the following steps that firstly, polyethylene polyamine and 1, 1, 2, 2-tetra (4-hydroxyphenyl) ethane are added into a reaction kettle, and the mixture is heated to be completely dissolved; secondly, raising the temperature under a stirring condition, gradually dropwise adding formaldehyde when the temperature is raised to 60 DEG C, continuously reacting for 2 hours, and then adding xylene; thirdly, raising the temperature to 140 DEG C, adding KOH into the reaction kettle, uniformly stirring, vacuumizing, and reducing the temperature to 100 DEG C; then, adding PO into the reaction kettle, and reacting for 2 hours under the conditions that the pressure is 0.3 MPa and the temperature is 135 DEG C; then, reducing the temperature to 120 DEG C under the condition that the pressure is not reduced, continuously adding KOH and EO, and reacting for 2 hours under the conditions that the pressure is 0.3 MPa and the temperature is 120 DEG C; and finally, adding acid liquor into the reaction kettle to neutralize residual KOH, extracting the mixture, and removing the solvent to obtain the paraffin remover and inhibitor. The paraffin remover has excellent surface activity and excellent paraffin removal and control effects, and can provide technical support for oil and gas exploitation.

Description

technical field [0001] The invention relates to the technical field of oil drilling, in particular to a wax removing and preventing agent and a preparation method thereof. Background technique [0002] In the field of oil extraction, paraffin is an alkane with a carbon number between 16 and 64 in crude oil, and the wax in the formation usually exists in a dissolved state. In the process of crude oil production, when the oil layer flows into the bottom of the well and is lifted from the bottom of the wellbore to the wellhead, with the decrease of temperature and pressure and the escape of dissolved gas, wax will precipitate, grow, aggregate and accumulate in the form of crystals. It is deposited on the tubing wall and sucker rod, reducing the production of the oil well, and at the same time causing problems such as overloading the sucker rod, clogging the tubing, and increasing the load of the oil well. Most of the crude oil in my country belongs to high waxy crude oil, and ...

AI Technical Summary

Problems solved by technology

Most of the existing wax removers with better effects are imported wax removers, which are less economical, and imported products lack supply guarantee. Therefore, there is an urgent need for a wax remover with better wax removal effect but lower cost. agent

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