Device and method for taking and storing mudstone core

Abstract

The invention belongs to the field of rock mechanics experiments, and specifically discloses a device and a method for taking and storing mudstone core. The device comprises an inner cladding, an integral bracket, a conformal casting layer, and a compression spring assembly. The conformal casting layer is arranged in the metal integral bracket. The inner cladding is arranged in the conformal casting layer. The compression spring assembly is arranged between the top of the integral bracket and the inner cladding. The method comprises the following steps of: wrapping the mudstone core sample bythe inner cladding; positioning the integral bracket and the mudstone core sample; mounting the integral bracket, the compression spring assembly and the conformal casting layer; casting a solidifiedmaterial in the conformal casting layer to shape the mudstone core sample; controlling the compression spring assembly to simulate a three-way compression state of the mudstone core sample, wherein this is the storage state of the mudstone core sample; and sampling the mudstone core sample. Therefore, the taking and store of the mudstone core are completed. According to the device and the method for taking and storing the mudstone core, the physical and mechanical properties of the mudstone core sample just after exiting the hole can be maintained after long-term suspension and long-distance transportation.

Description

technical field [0001] The invention belongs to the field of rock mechanics experiments, and in particular relates to a mudstone core access device and an access method thereof, which can maintain the in-situ shape, initial stress state and humidity of mudstone samples for a long time. Background technique [0002] Mudstone is a kind of rock formed by weakly consolidated clay after epigenesis. Because of its high clay content, soft texture, weaker consolidation than shale, and insignificant recrystallization, the mudstone sample taken from the borehole has low strength. , Easy to deform, easy to absorb water. These characteristics lead to large changes in key physical and mechanical properties such as shape and water content of mudstone during long-distance transportation, making it difficult to carry out experimental research with a high degree of reduction indoors. [0003] At present, there is no perfect relevant technical means for accessing mudstone cores in China. Oft...

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Problems solved by technology

[0004] The technical problem solved by the present invention: In order to solve the problem that it is difficult to carry out indoor mechanical tests on the in-situ mudstone core samples, the present invention provides a mudstone core access device and its access method, which can ensure that the mudstone core samples are stored for a long time After long-distance transportation, it still maintains the physical and mechanical properties of the mudstone core sample when it just came out of the hole

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