Three-dimensional simulation test device for oil extraction by injecting multielement hot fluid

Abstract

The invention relates a three-dimensional simulation test device for oil extraction by injecting multielement hot fluid. The device consists of a multielement injection system, a model system, a data acquisition process and control system, and a production system, wherein a model body is fixed in a hyperbaric chamber; and the hyperbaric chamber is connected with the multielement injection system,the data acquisition process and control system, and the production system. As medium can be replaced by separately or simultaneously injecting the multielement hot fluid, and gases are taken as ambient pressure packing medium for the model, the work intensity during the processes of charging and discharging the ambient pressure packing medium is greatly lowered; and as the stimulated reservoir pressure reaches 20 MPa, and the simulated reservoir temperature reaches 350 DEG C, the real-time data acquisition and processing can be realized at the channel temperature of 460 DEG C and under the channel pressure of 50 MPa, and the data acquisition channel can be enlarged. The three-dimensional simulation test device for the oil extraction by injecting the multielement hot fluid has the advantages of fully-automated control of test processes, namely injection, extraction and strata pressure / temperature simulation, online three-dimensional graphic visual analysis and processing of test data,automatic collection of extraction liquid, and oil-water centrifugal separation.

Description

Technical field: [0001] The invention relates to a three-dimensional simulation test device for oil recovery injected with multiple thermal fluids in an oil reservoir. Background technique [0002] Three-dimensional simulation test is an important means for the research and development of enhanced oil recovery technology. With the continuous introduction of new concepts of enhanced oil recovery, new requirements are put forward for the three-dimensional simulation test device, including: 1) the ability to inject multiple displacement media (such as steam, chemical agents or non-condensate gas, etc.); 2) capable of simulating high-pressure reservoir conditions (such as 20MPa); 3) capable of simulating high-temperature reservoir conditions (such as 350°C); 4) capable of horizontal well production reservoir simulation; 5) multi-channel, large-capacity Data acquisition system; 6) High degree of automatic control of the test process; 7) Powerful online and post-processing functi...

AI Technical Summary

Problems solved by technology

The results of the novelty search show that the existing test equipment for the research on multi-component thermal fluid EOR still has the following deficiencies: 1) It does not have the ability to carry out multi-component thermal fluid displacement research; 2) It does not have the ability to carry out long horizontal well sections 3) The reservoir pressure values ​​that can be simulated by existing test devices are generally low, and the overburden pressure method is mostly used, which is not suitable for steam injection oil recovery research (steam overlay); 4) due to the use of gas As a confining pressure medium, it is technically difficult in terms of safety and control. Most of the existing test devices in China use liquid as the confining pressure medium, resulting in cumbersome operation processes; 5) The data acquisition channel is limited and cannot meet the needs of simultaneous multi-point measurement; 6) The degree of automatic control of the system is relatively low; 7) The existing test data online and post-processing functions can no longer meet the research needs, such as graphic interpolation algorithm, 3D image analysis and processing functions, etc.; 8) The produced fluid of heavy oil reservoirs lacks effective automatic means of collection

[0010] 3) The thermal insulation method of the model in the prior art is relatively complicated. Since the confining pressure filling medium is liquid, the outer layer of the model cannot use conventional thermal insulation cotton, but a vacuum insulation method is required, and the processing and operation technology is relatively difficult;

[0011] 4) The net space built into the reservoir model body in the existing spherical pressure tank is 500mm×500mm×560mm (as described in the claims). Due to the size limitation of the model body, it is impossible to conduct research on the development effect of the horizontal well model longer than 560mm;

[0012] 5) The existing technology only allows 200 temperature measuring points in the model body (as described in the claims) in terms of data collection, and the number of measuring points cannot meet the research of large-scale reservoir models

[0020] 1) Only steam and gas injection systems are used in this technology, and there is no solvent injection device, that is, it cannot meet the research of new technologies for multi-element thermal fluids to enhance oil recovery;

[0021] 2) In this technology, the piston assembly mechanism is used to manufacture the overlying pressure of the model. During the research process of steam injection oil recovery using this overlying pressure method, the overlying pressure is often applied unevenly due to the filling problem of the model body, which easily leads to the injection of steam. Abnormal channeling, which seriously affects the reliability of test results

[0025] 1) The test temperature and pressure indicators of the existing technology are relatively low, which cannot meet the high temperature and high pressure test research such as 20MPa and 350°C;

[0026] 2) The existing technology does not have the ability to inject steam medium

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