Water-soluble thick oil viscosity reducer

Abstract

The invention discloses a water-soluble thick oil viscosity reducer belonging to the technical field of emulsified viscosity reducers of viscous crude oil. The water-soluble thick oil viscosity reducer is prepared from the following components in parts by weight: 0.01-1.0 part of surface active agent, 0.01-1.0 part of dispersant and 0.01-0.6 part of demulsifier, wherein the surface active agent is a nonionic surface active agent selected from OP-10, TX100, Span80 and Tween80, the dispersant is a water-soluble polymer material selected from polyacrylamide, polyvinyl alcohol, guar gum and cellulose, and the demulsifier is a polyoxyethylene-polyoxypropylene segmented copolymer. The invention has good emulsifying and viscosity-reducing effects, the emulsified crude oil can be automatically demulsified to reach a dehydration rate over 95 percent, and the viscosity reducer has little consumption and low cost by adopting low-price materials.

Description

technical field [0001] The invention relates to an emulsified viscosity reducer for viscous crude oil. Background technique [0002] With the deepening of oilfield exploration and development, the proportion of heavy oil is increasing. Heavy oil is crude oil with high asphaltene and colloid content and high viscosity. Crude oil with a surface density greater than 0.943 and an underground viscosity greater than 50 centipoise is usually called heavy oil. Because of its high density, heavy oil is also called heavy oil. Realizing the effective development of heavy oil reservoirs is an important research content of the national strategic plan for the sustainable development of oil and gas resources. Due to the characteristics of high density, high viscosity and poor fluidity of heavy oil, it brings great difficulties to mining and transportation. At present, methods such as heat mixing and thin oil blending are commonly used, the purpose of which is to reduce the viscosity of...

AI Technical Summary

Problems solved by technology

Although emulsification can effectively reduce the viscosity of heavy oil, if the performance of the formed emulsion is too stable, it will make it difficult to dehydrate the crude oil after recovery, which will eventually lead to poor use effect