Vacuum centrifugal machine for analyzing oil rock samples

Abstract

The invention provides a centrifugal machine, which comprises a framework, a centrifugal machine cavity, a centrifugal machine cover plate, a rotating shaft, a rotor, a sealing shock-absorbing device, a motor and a vacuum device for vacuumizing the centrifugal machine cavity. The centrifugal machine cavity is mounted on the framework, the centrifugal machine cover plate is movably connected onto the centrifugal machine cavity, the motor is hoisted on the centrifugal machine cavity, the rotating shaft of the motor extends into the centrifugal machine cavity and drives the rotor to rotate, and the rotating shaft is connected with the centrifugal machine cavity via the sealing shock-absorbing device. As the vacuum structure design and the sealing shock-absorbing device are adopted, stability of the centrifugal machine can be kept when the centrifugal machine rotates at high speed, limit rotation speed of a swing-out type rotor centrifugal machine frequently used at present is broken through effectively, the rotation speed is higher than 12000 revolutions, oil and water displacement tests of various rock samples can be finished smoothly, and the centrifugal machine can be applied to the fields such as medical analysis tests and the like.

Description

Technical field [0001] The invention relates to the field of core analysis, in particular to a device and method for measuring capillary pressure data of a rock sample. Background technique [0002] Petroleum resources occupy an extremely important position in the national economy and people's livelihood, and are an indispensable resource for social development and human survival. With the rapid development of industry, population growth and the improvement of people's living standards, energy shortage has become a worldwide problem, and energy security is being valued by more and more countries. [0003] At present, in oilfield exploration and development, it is necessary to analyze the sampled cores to provide a theoretical basis. In core analysis, one of the most important core analysis items is to measure the capillary pressure data of the rock sample. When two immiscible fluids contact each other in the rock pores, the pressures of the fluids on both sides of the interface be...

AI Technical Summary

Problems solved by technology

[0005] The best form of centrifuge test for rock samples is a centrifuge with a swing-out rotor, but at present, the limit speed of the swing-out rotor at home and abroad is 10,000 revolutions per minute, resulting in the oil-water displacement pressure that the centrifugal rotor of the centrifuge can generate. Less than the highest requirements, such as when measuring the oil content of tight volcanic rocks, because the centrifugal force is not enough, the residual amount of displaced substances in the oil-water displacement test is too high, and the measurement accuracy is greatly reduced

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