Crude oil viscosity reducer effect evaluation device and method

Abstract

The invention discloses a crude oil viscosity reducer effect evaluation device and a crude oil viscosity reducer effect evaluation method. A beam-pumping unit model is connected with a sucker rod and a piston in a shaft by a suspension line and a load sensor; a deep-well pump cylinder is connected with an oil pipe; a sleeve is arranged outside the oil pipe; an observation window is formed in the upper part of a wellhead in the upper part of the sleeve; the wellhead is connected with a liquid outlet storage tank by virtue of a tee joint, a production valve, a pressure return valve and a liquid outlet pipeline; a crude oil tank outlet valve is connected with the bottom of the sleeve by virtue of a crude oil outlet pipeline and a liquid inlet pipeline; a flowmeter II is arranged on the crude oil outlet pipeline; an emptying valve is arranged on the lower part of the crude oil outlet pipeline; a viscosity reducer tank outlet valve is connected with the liquid inlet pipeline through a viscosity reducer outlet pipeline; a flowmeter I is arranged on the viscosity reducer pipeline; a distribution box on an electric control part is connected with a heating and heat preservation system through a power line I; the distribution box is connected with a motor of the beam-pumping unit model through a power line II. The production conditions of the beam-pumping unit and the dynamic mixing and viscosity reducing processes between the viscosity reducer and the crude oil in the shaft lifting process are simulated, and polished rod load and displacement graphics are drawn.

Description

technical field [0001] The invention relates to an oilfield heavy oil viscosity reducer effect evaluation device and method technology, in particular to a heavy oil viscosity reducer effect evaluation device and method. Background technique [0002] Heavy oil is an important part of the global petroleum hydrocarbon energy and has a very huge production potential. my country is also very rich in heavy oil resources. More than 70 heavy oil fields have been discovered in 12 basins. However, due to the high viscosity of heavy oil, it is difficult to flow and cannot be recovered by conventional methods. At present, the methods for reducing viscosity of heavy oil mainly include adding oil-soluble viscosity reducing agent, surfactant, catalytic viscosity reduction, thin oil viscosity reduction, heating viscosity reduction, microwave viscosity reduction and other methods. Steam stimulation, steam flooding, heavy oil cold recovery and other technologies to improve the seepage of h...

AI Technical Summary

Problems solved by technology

Therefore, the viscosity-reducing effect of the viscosity-reducing agent measured by the rotational viscometer or rheometer is the viscosity-reducing effect measured after the viscosity-reducing agent is fully mixed with the heavy oil, which is an ideal state. Viscosity effect, can not well show the dynamic process of viscosity reducer and heavy oil in the lifting process, therefore, the use of rotational viscometer or rheometer to evaluate the viscosity reducer effect In the actual application process, the viscosity reduction effect is quite different

CN102852498A provides a heavy oil wellbore lifting viscosity reduction simulation device and method to overcome the above defects, but the final evaluation index still uses viscosity and viscosity reduction rate, which cannot directly reflect the viscosity reduction effect of heavy oil

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