Magnetic stirring high-temperature and high-pressure oil gas fluid sample preparation device and sample preparation method

Abstract

The invention discloses a magnetic stirring high-temperature and high-pressure oil gas fluid sample preparation device. The sample preparation device comprises a heating jacket, a high-pressure cavity with magnetic stirring, an external gas cylinder, an intermediate container and a high-pressure gas pump, wherein the interior of the high-pressure cavity is sequentially provided with a first cavity, a second cavity and a third cavity from top to bottom, and the first cavity is provided with a pipeline for inputting and outputting a sample; the third cavity is communicated with a high-pressure gas pump through an intermediate container; a heating sleeve wraps the periphery of the first cavity, a magnetic stirrer is arranged in the first cavity, and a pneumatic motor for driving is arranged below the magnetic stirrer; sample preparation of the degassed oil and the associated gas is completed by using the sample preparation device through four steps of oil gas injection, oil gas heating and pressurizing operation, oil gas stirring and mixing and sample preparation transfer-out. The device is novel in structural design, does not need to swing the cylinder in the sample preparation process, occupies a small area, adopts the pneumatic motor, shortens the length of the heating sleeve, saves electric energy, and is convenient and fast to use.

Description

technical field [0001] The invention relates to the field of petroleum and natural gas exploration and development, in particular to a magnetic stirring high-temperature and high-pressure oil-gas fluid sample preparation device and a sample preparation method. Background technique [0002] Before the development of oil and gas reservoirs, a lot of preliminary research and preparatory work are required. Among them, it is very important to master the basic phase properties of oil and gas fluids. The analysis of fluid phase properties first requires representative oil and gas samples. Oil and gas reservoirs have a certain temperature and pressure, especially with the advancement of exploration and development technology, a large number of high-temperature, high-pressure oil and gas reservoirs have been discovered. It is difficult to apply with a pressure-holding sampling device. Therefore, at present, oil and gas fluid samples are obtained mainly from on-site degassed crude oi...

AI Technical Summary

Problems solved by technology

Most of the sample dispensing devices used in laboratories now basically adopt the swing stirring method. On the one hand, it takes up a lot of space. Heating the hydraulic oil and the oil-air fluid for sample mixing will consume a lot of heat; third, the position of the movable piston in the sample mixing device that separates the oil-gas sample from the hydraulic oil cannot be predicted during the sample mixing process. When the end face of the piston is moved When in contact with the upper and lower sealing covers of the sample dispenser or the end surface of the sealing piston, the existence of the oil film on the contact surface makes it difficult to separate the two again under high pressure conditions, which affects the subsequent operation

Images