Experimental device for analysis on influential factors of thermal induced crack of rock

Abstract

The invention provides an experimental device for analysis on influential factors of thermal induced crack of a rock, and belongs to the technical field of thermal induced crack of rocks. The experimental device comprises a water storage tank, an oil storage tank and an experimental casing, the water storage tank includes a water storage cavity, the oil storage tank includes an oil storage cavity,a water pipe is arranged between the water storage tank and the oil storage tank, an experimental cavity is arranged in the experimental casing and is internally provided with first and second steelpipes, the lower end of the first steel pipe is positioned in the oil storage tank, the first steel pipe is communicated with the water pipe, a first carriage is arranged in the upper end of the firststeel pipe, the upper end of the second steel pipe is positioned in the water storage cavity, a second carriage is horizontally arranged in the lower end of the second steel pipe, first, second, third and fourth experimental boxes are arranged on the first carriage, and the first and second steel pipes are provided with first and second cameras respectively. Thus, the outside environment temperature, humidity and soaking condition can be changed, so that influence of crack condition for forming sound communication of the sound can be analyzed.

Description

technical field [0001] The invention belongs to the technical field of thermal cracking of rocks, and relates to an experimental device, in particular to an experimental device for analyzing influencing factors of thermal cracking of rocks. Background technique [0002] Rock cracking means that after the rock is heated, due to the different thermal expansion rates of the rock-forming mineral particles inside it, cracks will be generated inside the rock, causing changes in the physical properties of the reservoir rock (porosity, permeability, etc.). [0003] Because rock is a kind of polycrystal, its properties vary widely. Therefore, there are various factors affecting thermal cracking of rock under the action of heat, such as heating method, heating temperature, center of gravity position, rock water content, particle size, composition, etc. Mineral composition and the original structure of the rock. [0004] At the same time, conventional hydraulic fracturing used in oil ...

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Problems solved by technology

[0004] At the same time, conventional hydraulic fracturing used in oil fields can only produce fractures along a certain direction in the rock formation, while thermal fracturing of rocks forms a well-connected fracture network inside the rock, which will greatly improve the fluid conductivity of the reservoir. Therefore, it is of great significance to carry out research on thermal cracking of rocks for oil exploration and development.

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