Preprints
https://doi.org/10.5194/gi-2023-13
https://doi.org/10.5194/gi-2023-13
13 Nov 2023
 | 13 Nov 2023
Status: a revised version of this preprint was accepted for the journal GI and is expected to appear here in due course.

Research and application of small-diameter hydraulic fracturing in-situ stress measurement system

Yimin Liu, Mian Zhang, Yixuan Li, Shuai Lu, and Huan Chen

Abstract. Observation and estimation of the stress state in the deep crust is a crucial challenge in in-situ stress measurement work. Hydraulic fracturing method is an important borehole-based technique for absolute in-situ stress measurement. The small-diameter hydraulic fracturing in-situ stress measurement system described in this article consists mainly of underground measurement components (serial small-diameter packers and dual-circuit connecting installation rods) and surface control components (hydraulic fluid control system, data acquisition system, and high-pressure oil pump with controllable flow). It enables series measurement of small-sized boreholes for in-situ stress, provides a maximum measurement range of 30~45 MPa. The subsequent calculation of in-situ stress data adopts the uniform design method to discuss the influence of various external factors on rock fracturing values. The small-diameter hydraulic fracturing in-situ stress measurement system has the advantages of simple and lightweight structure, short testing time, high success rate, and low requirements for rock integrity and pressurization equipment. It has formed a series of small-diameter in-situ stress measurement equipment, which has been innovatively promoted to the field of underground tunnel safety assessment in coal mines and metal mining areas. It has important practical value and economic significance in accurately determining the in-situ stress state of deep development areas.

Yimin Liu, Mian Zhang, Yixuan Li, Shuai Lu, and Huan Chen

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on gi-2023-13', Anonymous Referee #1, 20 Dec 2023
    • AC1: 'Reply on RC1', Huan Chen, 21 Dec 2023
  • RC2: 'Comment on gi-2023-13', Anonymous Referee #2, 31 Jan 2024
    • AC2: 'Reply on RC2', Huan Chen, 04 Feb 2024

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on gi-2023-13', Anonymous Referee #1, 20 Dec 2023
    • AC1: 'Reply on RC1', Huan Chen, 21 Dec 2023
  • RC2: 'Comment on gi-2023-13', Anonymous Referee #2, 31 Jan 2024
    • AC2: 'Reply on RC2', Huan Chen, 04 Feb 2024
Yimin Liu, Mian Zhang, Yixuan Li, Shuai Lu, and Huan Chen
Yimin Liu, Mian Zhang, Yixuan Li, Shuai Lu, and Huan Chen

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Short summary
We developed a serialized mall-diameter hydraulic fracturing in-situ stress measurement system, which enables series measurement of small-sized boreholes for in-situ stress, and has the advantages of simple and lightweight structure, short testing time, high success rate, and low requirements for rock integrity and pressurization equipment. This system has important practical value and economic significance in accurately determining the in-situ stress state of deep development areas.