Mapping of Hydraulic Fractures under Triaxial Stress Conditions in Laboratory Experiments using Acoustic Emissions

2012 ◽  
Author(s):  
Akash Damani ◽  
Abhishek Sharma ◽  
Carl H. Sondergeld ◽  
Chandra Shekhar Rai
Keyword(s):  
Laboratory Experiments ◽  
Acoustic Emissions ◽  
Stress Conditions ◽  
Triaxial Stress ◽  
Hydraulic Fractures

A preliminary experimental study on sand production under true triaxial stress conditions

2011 ◽  
Vol 51 (1) ◽  
pp. 567
Author(s):  
Ahmadreza Younessi ◽  
Vamegh Rasouli
Keyword(s):  
Laboratory Experiments ◽  
Test Procedure ◽  
Experimental Studies ◽  
Stress Conditions ◽  
Triaxial Stress ◽  
Cylindrical Shape ◽  
Sand Production ◽  
True Triaxial ◽  
Unconsolidated Sands ◽  
True Triaxial Stress

Sand production prediction is becoming a regular study in reservoirs with weak or unconsolidated sands. Three main approaches for sanding prediction are analytical, numerical and experimental methods. Laboratory experiments have proven to provide more realistic results, with these being used to understand sanding mechanisms and validate analytical and numerical methods. A large number of experimental studies have been carried out by researchers worldwide—most of which have been performed on cylindrical-shape samples under uniaxial (i.e. σ1 ≠ 0, σ2 = σ3 = 0) or triaxial (i.e. σ1 ≠ 0, σ2 = σ3 ≠ 0) stress conditions. In general, a sanding experiment under true-triaxial stresses (i.e. σ1 ≠ σ2 ≠ σ3 ≠ 0) is more realistic in simulating downhole conditions. This stress condition can be simulated in the laboratory on a cubic sample. The first part of this paper provides a comprehensive but brief literature review on past sanding laboratory experiments. This will be followed by the introducition of a unique true-triaxial stress cell (TTSC) which was modified and used for sanding simulations in the laboratory. The applied modifications will be illustrated and the test procedure described. The sample preparation for testing synthetic samples will be explained and some preliminary results obtained will be presented.

Acoustic emission and SEM analyses of hydraulic fractures under triaxial stress conditions

2012 ◽  
Author(s):  
Akash Damani ◽  
Abhishek Sharma ◽  
Carl Sondergeld ◽  
Chandra Rai
Keyword(s):  
Acoustic Emission ◽  
Stress Conditions ◽  
Triaxial Stress ◽  
Hydraulic Fractures ◽  
Sem Analyses

scholarly journals Acoustic Emission in Snow at Constant Rates of Deformation

1973 ◽  
Vol 12 (64) ◽  
pp. 144-146 ◽  
Author(s):  
W. F. St. Lawrence ◽  
T. E. Lang ◽  
R.L. Brown ◽  
C. C. Bradley
Keyword(s):  
Acoustic Emission ◽  
Brittle Fracture ◽  
Uniaxial Compression ◽  
Laboratory Experiments ◽  
Acoustic Emissions ◽  
Snow Sample ◽  
Frequency Range ◽  
Snow Samples

AbstractAcoustic emissions in the audio spectrum are reported from observations of laboratory experiments conducted on snow samples in uniaxial compression. A number of tests show the pattern of acoustic emissions to be a function of the rate of deformation. Over the frequency range 20 to 7 000 Hz acoustic emissions are associated with rates of deformation corresponding to brittle fracture of the snow sample. Though probably present, no acoustic emissions were detected from samples deforming plastically.

Deformation and CO2 gas permeability response of sandstone to mean and deviatoric stress variations under true triaxial stress conditions

2019 ◽  
Vol 84 ◽  
pp. 259-272 ◽  
Author(s):  
Jun Lu ◽  
Guangzhi Yin ◽  
Xing Li ◽  
Minghui Li ◽  
Dongming Zhang ◽  
...  
Keyword(s):  
Gas Permeability ◽  
Deviatoric Stress ◽  
Stress Conditions ◽  
Triaxial Stress ◽  
Co2 Gas ◽  
True Triaxial ◽  
True Triaxial Stress ◽  
Stress Variations

The thermodynamics of brittle fracture initiation under triaxial stress conditions

1972 ◽  
Vol 8 (2) ◽  
pp. 167-173 ◽  
Author(s):  
S. A. F. Murrell ◽  
P. J. Digby
Keyword(s):  
Brittle Fracture ◽  
Fracture Initiation ◽  
Stress Conditions ◽  
Triaxial Stress

A Photographic Method for Measuring Soil Deformations during Internal Erosion under Triaxial Stress Conditions

2017 ◽  
Vol 41 (1) ◽  
pp. 20170031 ◽  
Author(s):  
C. Chen ◽  
L. M. Zhang ◽  
Hong Zhu
Keyword(s):  
Stress Conditions ◽  
Triaxial Stress ◽  
Internal Erosion ◽  
Photographic Method
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