Online extraction type hydrocarbon expulsion thermal simulation experiment device and method

Abstract

The invention discloses an online extraction type hydrocarbon expulsion thermal simulation experiment device. The experiment device comprises a sample cylinder, a cylindrical electric furnace sleevingthe sample cylinder, a liquid injection mechanism and a gas-liquid collecting mechanism. The upper end and the lower end of the sample cylinder are respectively provided with a movable sealing structure. The movable sealing structures at the upper end and the lower end of the sample cylinder are respectively connected with a support beam and a jack. The liquid injection mechanism includes an injection pipe and a solvent pump. One end of the injection pipe is communicated with the inner cavity of the sample cylinder, and the other end is connected with the solvent pump through a first high pressure valve. The gas-liquid collecting mechanism includes an outflow pipe, a cold trap, a vacuum gas cylinder and a pressure gauge. A graphite sealing ring is adopted in each movable sealing structurefor sealing and is good in sealing effect. In addition, a closed online in-situ cleaning method is adopted, samples are not exposed in the whole process, the loss of volatile components in the oil isavoided, and experimental results are accurate and reliable. Moreover, the cleaning method of continuously injecting a solvent is high in efficiency, and the amount of the solvent used is only 1 / 3 that of the conventional method.

Description

technical field [0001] The invention relates to the technical field of rock thermal simulation hydrocarbon generation and expulsion experiments, in particular to an online extraction type hydrocarbon generation and expulsion thermal simulation experiment device and method. Background technique [0002] Rocks containing organic matter in the formation produce oil and gas under the action of geothermal heat. In the laboratory, the process of producing oil and gas by the long-term low temperature of the rock in the natural formation can be reproduced by artificially heating the sample at a high temperature. The purpose of the experiment is to study how much oil and gas (hydrocarbon generation) is produced by the organic matter in the rock under a certain temperature and heating time, and how much oil and gas migrates out of the heated rock (hydrocarbon expulsion). [0003] At present, the thermal simulation experiments of hydrocarbon generation and expulsion of rocks are all ma...

AI Technical Summary

Problems solved by technology

The existing equipment has the following defects: 1. The sealing of the thermal reaction vessel is made of red copper or similar materials, which have poor sealing performance and cannot guarantee the sealing of the gas; 2. Because the sealing material is relatively hard, it often gets stuck in the reaction vessel , so that the sealing ring and the sample cannot be taken out, resulting in damage to the equipment; 3. After the experiment is over, the sample must be taken out from the reaction vessel and crushed. This process will cause the sample to be exposed to the air for a long time, so that the The light hydrocarbons are almost completely lost; 4. The oil produced in the experiment adheres to the inner wall of the reaction vessel and the passages such as pipes and valves. When cleaning, all the fittings such as pipes and valves that are in contact with oil must be removed and cleaned, which is difficult to operate and seriously pollutes the environment. And can not avoid the loss of oil during the cleaning process

The above problems lead to a series of problems such as complicated experimental operations, poor accuracy of experimental results, and large amount of chemical solvents used.

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