Acoustic wave propagation in cracked porous rocks and application to interpreting acoustic log data in tight formations

2012 ◽  
Vol 131 (4) ◽  
pp. 3370-3370
Author(s):  
Xiaoming Tang ◽  
Xuelian Chen
Keyword(s):  
Wave Propagation ◽  
Acoustic Wave ◽  
Porous Rocks ◽  
Acoustic Wave Propagation ◽  
Log Data ◽  
Tight Formations

Velocity-Log Interpretation: The Effect of Rock Bulk Compressibility

1961 ◽  
Vol 1 (04) ◽  
pp. 235-248 ◽  
Author(s):  
J. Geertsma
Keyword(s):  
Wave Propagation ◽  
Acoustic Wave ◽  
Wave Velocity ◽  
Acoustic Waves ◽  
Carbonate Rocks ◽  
Empirical Relationship ◽  
Biot Theory ◽  
Porous Rocks ◽  
Acoustic Wave Propagation ◽  
Log Interpretation

Abstract Tbe relationsbip between porosity and the speed of propagation of acoustic waves in fluid-saturated porous rocks as measured by the Sonic log and by ultrasonic techniques is analyzed. Biot's continuum theory is used to explain the difference in acoustic wave propagation between a dry and a liquid-saturated porous material. The porosity is a variable in this theory. However, the acoustic wave propagation in the dry rock depends too on porosity, and this dependence is not predicted by the theory. Frequently in dry sandstones, a nearly linear relationsbip between reciprocal acoustic wave velocity and porosity is observed in the low-porosity range. The physics behind this behavior is outlined. An empirical relationship of the form, 1/V ~ A + B ø, applies accordingly for many porous dry rocks, provided the porosity is the only variable. The presence of a liquid in the pores changes the value of B, and this change is found to be in agreement with the Biot theory. The time-average relation introduced some years ago results in an equation of the same type 1/V = ø/Vf + (1 - ø)/Vr - but is not based on a sound physical picture. Still, this relation sometimes predicts approximately correct A and B values. Carbonate rocks with their complicated pore structures sometimes show a different relationship between wave velocity and porosity, unfavorable for log interpretation. Examples are presented. The simultaneous presence of calcite, dolomite and anhydrite, with their different grain densities and matrix compressibilities, complicates acoustic-log interpretation in carbonate rocks still further. Other complicating effects of acoustic-log interpretation are discussed. They are related to the influence of shale streaks and natural fractures on the average wave velocity observed by the logging tool and to the effect of adsorption phenomena on wave propagation in unstressed rocks particularly in sandstones.

Acoustic wave propagation in two dimensional sheared ducted flows

1997 ◽  
Author(s):  
E. Longatte ◽  
P. Lafon ◽  
S. Candel ◽  
E. Longatte ◽  
P. Lafon ◽  
...  
Keyword(s):  
Wave Propagation ◽  
Acoustic Wave ◽  
Two Dimensional ◽  
Acoustic Wave Propagation

Investigations on the influence CuO doping on elastic properties of Li2SO4–MgO–P2O5 glass system by means of acoustic wave propagation

2021 ◽  
Vol 330 ◽  
pp. 114270
Author(s):  
A. Venkata Sekhar ◽  
A.V. Kityk ◽  
J. Jedryka ◽  
P. Rakus ◽  
A. Wojciechowski ◽  
...  
Keyword(s):  
Wave Propagation ◽  
Acoustic Wave ◽  
Elastic Properties ◽  
Glass System ◽  
Acoustic Wave Propagation

Influence of NiO doping on elastic properties of Li2SO4-MgO-P2O5 glass system-Investigation by means of acoustic wave propagation

2021 ◽  
Vol 127 (5) ◽  
Author(s):  
A. Venkata Sekhar ◽  
A. Siva Sesha Reddy ◽  
A.V. Kityk ◽  
J. Jedryka ◽  
P. Rakus ◽  
...  
Keyword(s):  
Wave Propagation ◽  
Acoustic Wave ◽  
Elastic Properties ◽  
Glass System ◽  
Acoustic Wave Propagation

Imaging the Chicxulub Central Crater Zone from Large-Scale Seismic Acoustic Wave Propagation and Gravity Modeling

2021 ◽  
Author(s):  
Carlos Ortiz-Aleman ◽  
Ronald Martin ◽  
Jaime Urrutia-Fucugauchi ◽  
Mauricio Orozco del Castillo ◽  
Mauricio Nava-Flores
Keyword(s):  
Wave Propagation ◽  
Acoustic Wave ◽  
Large Scale ◽  
Gravity Modeling ◽  
Acoustic Wave Propagation ◽  
Central Crater
Sign in / Sign up

Export Citation Format

Share Document