An experimental setup for injecting alloys into core samples

Abstract

The invention provides an experimental device for injecting an alloy into a rock core sample. The experimental device comprises a rock core cup, an alloy wrapping device, a first heating device, a first choke plug, a vacuum pump, an alloy injection device, a second heating device, a second choke plug and a pressure loading device, wherein the alloy wrapping device includes a first cylinder; the first cylinder is provided with an inner cavity for placing the rock core cup and is provided with an open end; the first heating device is disposed outside of the first cylinder; the first choke plug is connected with the open end of the first cylinder in a sealing manner; the vacuum pump is capable of vacuumizing the inner cavity and is connected with the first choke plug and communicated with theinner cavity; the alloy injection device includes a second cylinder; the second cylinder is provided with a hollow cavity for placing the rock core cup and is provided with another open end; the second heating device is disposed outside of the second cylinder; the second choke plug is connected with the open end of the second cylinder in the sealing manner; the pressure loading device is connected with the second choke plug and can be communicated with the hollow cavity. According to the experimental device for injecting the alloy into the rock core sample, the alloy can be injected into therock core sample; by scanning the rock core sample injected with the alloy and analyzing the distribution and content of the alloy in the rock core sample, the connectivity of a shale and a coal reservoir can be intuitively and quantitatively researched.

Description

technical field [0001] The invention relates to the technical field of oil reservoirs, in particular to an experimental device for injecting alloys into rock core samples. Background technique [0002] my country has abundant reserves of unconventional oil and gas resources, and its exploration and development have attracted more and more attention. In order to solve the problems in exploration and development, experimental research has gradually deepened. Unconventional reservoirs (such as shale / coal reservoirs) have small pores, so it is difficult to detect reservoir connectivity by conventional experimental methods. When detecting the connectivity of shale / coal reservoirs, the shale / coal samples are prepared first, and then the connectivity between nanoscale pores and fractures in the shale / coal samples is detected. The research on the connectivity of shale / coal reservoirs is not only of great significance to the theoretical research of shale gas / coalbed methane accumula...

AI Technical Summary

Problems solved by technology

[0003] At present, when detecting the connectivity of shale / coal reservoirs, the drilled core samples (shale / coal samples) are directly scanned, for example, by CT scanning and FIB three-dimensional reconstruction technology, and the data obtained by scanning Reconstruct the core body to study the connectivity of pores and fractures. The connectivity values ​​obtained by this method are all digitally calculated, and the artificially selected thresholds are different, and the obtained connectivity is also different, which is difficult to truly reflect the reservoir connectivity.

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