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A stability evaluation device for core samples

A core sample and evaluation device technology, which is applied in measuring devices, suspension and porous material analysis, permeability/surface area analysis, etc., can solve the problems of inability to comprehensively evaluate shale stability and single function, and achieve simple structure, The effect of accurate monitoring results

Active Publication Date: 2020-02-21
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing evaluation device has a single function and cannot comprehensively evaluate the stability of shale with fractures

Method used

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  • A stability evaluation device for core samples
  • A stability evaluation device for core samples
  • A stability evaluation device for core samples

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Experimental program
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Embodiment Construction

[0024] The present invention will be further described below in conjunction with accompanying drawing.

[0025] see figure 1 , figure 2 and image 3 As shown, the evaluation device can be used to evaluate core samples 6 (see figure 2 ) distribution of pore pressure in different directions. Wherein, the core sample 6 may be fractured shale. like figure 1 As shown, the evaluation device includes a cabinet body 100 , a kettle body assembly 200 , a confining pressure pump assembly 300 and a flow pump assembly 400 . In the present embodiment, the cabinet body 100 is fixedly installed with a bearing plate 101 inside. The carrying plate 101 can be fastened inside the cabinet body 100 by screws or rivets, for example, or the carrying plate 101 can be fixedly connected with the cabinet body 100 in a plug-in type. The arrangement of the carrying board 101 divides the cabinet body 100 into a first installation area 102 and a second installation area 103 .

[0026] In one embodi...

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Abstract

The invention relates to a core sample stability evaluation device. The evaluation device comprises a cabinet, wherein a bearing plate is installed in the cabinet and divides the cabinet into a first installation area and a second installation area; a kettle assembly used for measuring the pore pressure of a core sample in different positions is fixedly installed on the bearing plate; a confining-pressure pump assembly and a constant-flux pump assembly are arranged in the second installation area, the confining-pressure pump assembly is communicated with the kettle assembly and used for supplying first predetermined pressure to the kettle assembly, and the constant-flux pump assembly is communicated with the kettle assembly and used for supplying second predetermined pressure to the core sample. The evaluation device has the advantages that pressure transmission conditions in different directions of the core sample are effectively monitored, and therefore evaluation of the stability of the core sample is realized; the structure is simple and reliable, the monitoring result is accurate, and well wall stability is accurately judged.

Description

technical field [0001] The invention relates to the technical field of well wall stability evaluation in the process of petroleum exploration and development, in particular to a stability evaluation device for rock core samples. Background technique [0002] Mud shale belongs to the transitional rock type between mudstone and shale, and is an important sedimentary rock. Therefore, the research on mud shale plays an important role in petroleum exploration and development. Mud shale has the characteristics of small voids, complex structure, and easy water absorption and expansion. Therefore, the stability of well walls made of shale is relatively weak. In this way, in the process of shale gas exploration and development, the problem of instability of the mud shale well wall is often encountered, which may easily cause formation collapse and cause drilling accidents. Therefore, an evaluation device for evaluating the stability of the borehole wall is needed to avoid the occurr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08
Inventor 曾义金王怡陈军海徐江孙连环张金成牛新明陈一健张伦平张辉韩艳浓王磊
Owner CHINA PETROLEUM & CHEM CORP
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