Investigation of acoustic emission response and fracture morphology of rock hydraulic fracturing under true triaxial stress

• Autorzy: Yue Yuqing , Peng Shoujian , Liu Yixin , Xu Jiang

Identyfikatory

DOI

10.1007/s11600-019-00299-x

• Języki publikacji: EN

Abstrakty

EN

Hydraulic fracturing technique has been used to exploit hydrocarbons resources in the past years. To investigate the mechanism of hydrofracturing process, a true triaxial hydraulic fracturing device combined with acoustic emission (AE) system is employed to study the crack initiation and propagation under different injection rates. Furthermore, a 3D scanner is employed to obtain the morphology of the fractured surface when the fracturing test completes. The results show that in hydraulic fracturing, the cracks propagating mostly perpendicular to the direction of the minimum horizontal principal stress. A lower injection rate corresponds to the peak value of the AE count occurring at a later time and a large value of the cumulative AE count, indicating greater damage and a complicated crack propagation path. With the injection rate increased, the earlier the microcracks occur, the shorter the fracturing time of the specimen is, and the fatter the fracture morphology.

Słowa kluczowe

EN

hydraulic fracturing; acoustic emission; injection rate; crack propagation

PL

szczelinowanie hydrauliczne; emisja akustyczna; szybkość wtrysku; propagacja pęknięć

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2019
• Tom: Vol. 67, no. 4
• Strony: 1017--1024
• Opis fizyczny: Bibliogr. 28 poz.

Twórcy

autor

Yue Yuqing

• State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, People’s Republic of China

autor

Peng Shoujian

• State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, People’s Republic of China

autor

Liu Yixin

• College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, People’s Republic of China

autor

Xu Jiang

• State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, People’s Republic of China

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).