Core gap and core rupture stress detection device

Abstract

The invention discloses a core gap and core fracture stress detection device. The core gap and core fracture stress detection device comprises a core clamping device (11) and a core gap knife (9) arranged above the core clamping device (11), wherein the core gap knife (9) is connected with a hydraulic power system and a pressure collecting system; and one side of the core clamping device (11) is provided with an image collecting system (11), and the hydraulic power system, the pressure collecting system and the image collecting system are electrically connected with a main control device (7) through a transmission and control circuit (8). The core gap and core fracture stress detection device provided by the invention has the features of high automation, and safety and stability in running, and has the advantages of safety in use, high data collection accuracy, wide application range and the like.

Description

Technical field [0001] The invention relates to a stress detection device, in particular to a stress detection device used for core fracture and core fracture. Background technique [0002] In recent years, with the development of oil and gas exploration and development of ultra-low permeability unconventional sandstone reservoirs, this type of reservoir has posed challenges to the development and displacement experiments. In general, the main points are as follows: First, this type of reservoir Due to the low permeability of conventional cores, the experimental displacement pressure is too high, which brings operational safety hazards; secondly, due to the high density of this type of reservoir, the success rate of core flooding experiments is very low; in addition, this type of reservoir In the oilfield development, the ultimate goal is to use acid fracturing and other measures for exploitation. [0003] Therefore, it is necessary to improve the core in order to carry out develo...

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Problems solved by technology

[0004] According to inquiries, at present, domestic oilfield laboratories do not have a set of testing devices or instruments for core fracturing and core fracture stress.

But there is a set of similar instruments, which is a pneumatic core splitting machine invented by Daqing Oilfield. This splitting machine mainly splits the core along the axis by external force. The purpose of the invention is to solve the problem of high labor intensity when splitting the core. , poor safety, whether the core splitting surface is straight, etc. Therefore, the research on the improvement of the permeability of the core after artificial fractures cannot be carried out on the splitting machine, and the research on the minimum stress of the core rupture and the structure of the minimum stress surface cannot be realized.

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