Acoustic emission characterization of microcracking in laboratory-scale hydraulic fracturing tests

Hampton, Jesse; Gutierrez, Marte; Matzar, Luis; Hu, Dandan; Frash, Luke

doi:10.1016/j.jrmge.2018.03.007

Title: Acoustic emission characterization of microcracking in laboratory-scale hydraulic fracturing tests

Abstract

Understanding microcracking near coalesced fracture generation is critically important for hydrocarbon and geothermal reservoir characterization as well as damage evaluation in civil engineering structures. Dense and sometimes random microcracking near coalesced fracture formation alters the mechanical properties of the nearby virgin material. Individual microcrack characterization is also significant in quantifying the material changes near the fracture faces (i.e. damage). Acoustic emission (AE) monitoring and analysis provide unique information regarding the microcracking process temporally, and information concerning the source characterization of individual microcracks can be extracted. In this context, laboratory hydraulic fracture tests were carried out while monitoring the AEs from several piezoelectric transducers. In-depth post-processing of the AE event data was performed for the purpose of understanding the individual source mechanisms. Several source characterization techniques including moment tensor inversion, event parametric analysis, and volumetric deformation analysis were adopted. Post-test fracture characterization through coring, slicing and micro-computed tomographic imaging was performed to determine the coalesced fracture location and structure. Distinct differences in fracture characteristics were found spatially in relation to the openhole injection interval. Individual microcrack AE analysis showed substantial energy reduction emanating spatially from the injection interval. Lastly, it was quantitatively observed that the recorded AE signals provided sufficient informationmore »« less

Authors:

; Gutierrez, Marte; Matzar, Luis; Hu, Dandan; Frash, Luke

Publication Date:: Mon Oct 01 00:00:00 EDT 2018

Research Org.:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Org.:: USDOE Laboratory Directed Research and Development (LDRD) Program

OSTI Identifier:: 1694226

Alternate Identifier(s):: OSTI ID: 1454998

Report Number(s):: LA-UR-17-30661
Journal ID: ISSN 1674-7755; S1674775517304468; PII: S1674775517304468

Grant/Contract Number:: FE0002760; AC52-06NA25396

Resource Type:: Published Article

Journal Name:: Journal of Rock Mechanics and Geotechnical Engineering

Additional Journal Information:: Journal Name: Journal of Rock Mechanics and Geotechnical Engineering Journal Volume: 10 Journal Issue: 5; Journal ID: ISSN 1674-7755

Publisher:: Elsevier

Country of Publication:: China

Language:: English

Subject:: 42 ENGINEERING; 58 GEOSCIENCES; acoustic emission (AE); microcracking; hydraulic fracturing; laboratory-scale testing; moment tensor analysis; fracture coalescence; computed tomography (CT) imaging

Citation Formats


                    Hampton, Jesse, Gutierrez, Marte, Matzar, Luis, Hu, Dandan, and Frash, Luke. Acoustic emission characterization of microcracking in laboratory-scale hydraulic fracturing tests.  China: N. p., 2018. 
Web.  doi:10.1016/j.jrmge.2018.03.007.

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                    Hampton, Jesse, Gutierrez, Marte, Matzar, Luis, Hu, Dandan, & Frash, Luke. Acoustic emission characterization of microcracking in laboratory-scale hydraulic fracturing tests.  China.  https://doi.org/10.1016/j.jrmge.2018.03.007

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                    Hampton, Jesse, Gutierrez, Marte, Matzar, Luis, Hu, Dandan, and Frash, Luke. Mon .  
"Acoustic emission characterization of microcracking in laboratory-scale hydraulic fracturing tests".  China.  https://doi.org/10.1016/j.jrmge.2018.03.007.

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@article{osti_1694226,

  title        = {Acoustic emission characterization of microcracking in laboratory-scale hydraulic fracturing tests},

  author       = {Hampton, Jesse and Gutierrez, Marte and Matzar, Luis and Hu, Dandan and Frash, Luke},

  abstractNote = {Understanding microcracking near coalesced fracture generation is critically important for hydrocarbon and geothermal reservoir characterization as well as damage evaluation in civil engineering structures. Dense and sometimes random microcracking near coalesced fracture formation alters the mechanical properties of the nearby virgin material. Individual microcrack characterization is also significant in quantifying the material changes near the fracture faces (i.e. damage). Acoustic emission (AE) monitoring and analysis provide unique information regarding the microcracking process temporally, and information concerning the source characterization of individual microcracks can be extracted. In this context, laboratory hydraulic fracture tests were carried out while monitoring the AEs from several piezoelectric transducers. In-depth post-processing of the AE event data was performed for the purpose of understanding the individual source mechanisms. Several source characterization techniques including moment tensor inversion, event parametric analysis, and volumetric deformation analysis were adopted. Post-test fracture characterization through coring, slicing and micro-computed tomographic imaging was performed to determine the coalesced fracture location and structure. Distinct differences in fracture characteristics were found spatially in relation to the openhole injection interval. Individual microcrack AE analysis showed substantial energy reduction emanating spatially from the injection interval. Lastly, it was quantitatively observed that the recorded AE signals provided sufficient information to generalize the damage radiating spatially away from the injection wellbore.},

  doi          = {10.1016/j.jrmge.2018.03.007},

  journal      = {Journal of Rock Mechanics and Geotechnical Engineering},

  number       = 5,

  volume       = 10,

  place        = {China},

  year         = {Mon Oct 01 00:00:00 EDT 2018},

  month        = {Mon Oct 01 00:00:00 EDT 2018}

}

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Works referencing / citing this record:

Slip and instability mechanisms of coal‐rock parting‐coal structure ( CRCS ) under coupled dynamic and static loading
journal, August 2019

Liu, Yang; Lu, Cai‐Ping; Liu, Bin
Energy Science & Engineering, Vol. 7, Issue 6
DOI: 10.1002/ese3.454

Microcrack Damage Observations near Coalesced Fractures Using Acoustic Emission
journal, April 2019

Hampton, Jesse; Gutierrez, Marte; Matzar, Luis
Rock Mechanics and Rock Engineering, Vol. 52, Issue 10
DOI: 10.1007/s00603-019-01818-4

Predictions of macro-scale fracture geometries from acoustic emission point cloud data in a hydraulic fracturing experiment
journal, September 2018

Hampton, Jesse; Gutierrez, Marte; Frash, Luke
Journal of Petroleum Exploration and Production Technology, Vol. 9, Issue 2
DOI: 10.1007/s13202-018-0547-z

Experimental Study of Fracturing Fluid Retention in Rough Fractures
journal, April 2019

Zhang, Yanjun; Ge, Hongkui; Liu, Guangyu
Geofluids, Vol. 2019
DOI: 10.1155/2019/2603296

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Title: Acoustic emission characterization of microcracking in laboratory-scale hydraulic fracturing tests

Abstract

Citation Formats

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