Method for testing impacts on high-viscosity heavy crude oil from salt

Abstract

The invention discloses a method for testing impacts on high-viscosity heavy crude oil from salt. The method comprises: first, salt solutions with different concentrations are prepared, and high-viscosity heavy crude oil is extracted standby; second, the high-viscosity heavy crude oil with the same amount is placed in experiment containers; third, the salt solutions with different concentrations with the same amount are added into the experiment containers respectively, stirred and mixed uniformly; fourth, the experiment containers are placed in a constant temperature water bath and allowed for stand for a while; fifth, interfacial tension is tested through an interface tensiometer, and the impacts on interfacial tension of heavy oil from salt solution contents are studied. Through the method, the impacts on high-viscosity heavy crude oil from salt can be tested rapidly, the test precision is high, and the test cost is lowered greatly.

Description

technical field [0001] The invention relates to a test method for testing the influence of salt on high-viscosity heavy crude oil. Background technique [0002] In addition to high viscosity, heavy crude oil with high viscosity also has high density. High-viscosity heavy crude oil contains less light distillate and high content of gum and bitumen. The viscosity of high-viscosity heavy crude oil changes significantly with temperature, for example, the temperature increases by 8-9. C, the viscosity can be reduced by half. Therefore, for the exploitation and transportation of high-viscosity heavy crude oil, heat is often used to reduce its viscosity, such as steam drive, thermal oil circulation, and burning oil layers. It can also be mixed with thin oil, emulsified, and added with active agent to reduce its viscosity. Crude oil with a degassed crude oil viscosity greater than 10,000 mPa·s at the reservoir temperature is called very heavy oil. [0003] High-viscosity heavy ...

AI Technical Summary

Problems solved by technology

[0007] The difficulty of burning oil reservoirs is that the implementation process is difficult, it is not easy to control underground combustion, and at the same time, the cost of injecting a large amount of air at high pressure is very expensive

However, the chemical agents added by the chemical viscosity reduction method have caused serious pollution to the formation to some extent.