Numerical Simulation of MWD Pressure Pulse Transmission

1985 ◽  
Author(s):  
S.J. Chen ◽  
J.T. Aumann
Keyword(s):  
Numerical Simulation ◽  
Pressure Pulse ◽  
Pulse Transmission

Pressure pulse transmission into vascular beds

1986 ◽  
Vol 32 (2) ◽  
pp. 152-163 ◽  
Author(s):  
Arnold G. Salotto ◽  
Lawrence F. Muscarella ◽  
Julius Melbin ◽  
John K.-J. Li ◽  
Abraham Noordergraaf
Keyword(s):  
Pressure Pulse ◽  
Pulse Transmission ◽  
Vascular Beds

DYNAMICS OF PRESSURE PULSE TRANSMISSION IN THE AORTA*

2006 ◽  
Vol 128 (3) ◽  
pp. 921-938 ◽  
Author(s):  
George S. Malindzak ◽  
Ralph W. Stacy
Keyword(s):  
Pressure Pulse ◽  
Pulse Transmission

Pressure Pulse Transmission Ratio (PPTR) of Inferior Vena Cava and the Blood Volume Status

1992 ◽  
pp. 321-323
Author(s):  
Tetsuo Hatanaka ◽  
Rokuro Shiba ◽  
Michihiko Fukui ◽  
Masami Yoshioka ◽  
Eiichi Chihara ◽  
...  
Keyword(s):  
Inferior Vena Cava ◽  
Blood Volume ◽  
Inferior Vena ◽  
Pressure Pulse ◽  
Vena Cava ◽  
Transmission Ratio ◽  
Volume Status ◽  
Pulse Transmission

Determining Shale Permeability to Gas by Simultaneous Analysis of Various Pressure Tests

SPE Journal ◽  
2012 ◽  
Vol 17 (03) ◽  
pp. 717-726 ◽  
Author(s):  
F.. Civan ◽  
C.S.. S. Rai ◽  
C.H.. H. Sondergeld
Keyword(s):  
Gas Flow ◽  
Pressure Pulse ◽  
Reference Conditions ◽  
Transient State ◽  
Data Interpretation ◽  
Model Parameters ◽  
Apparent Permeability ◽  
Core Samples ◽  
Pulse Transmission ◽  
Pressure Tests

Summary A model-assisted analysis is presented of pressure-pulse-transmission data obtained under different pressure conditions with core plugs of shale-gas formations. Applications and validations for steady-state and transient-state laboratory tests are provided. Best-estimate values of the intrinsic permeability and tortuosity at a reference condition and the Langmuir volume and pressure are determined by matching the solution of a modified Darcy model to several pressure-pulse-transmission flow tests with core samples simultaneously. The data-interpretation model considers the prevailing characteristics of the apparent permeability under the various flow regimes involving gas flow through extremely low-permeability core samples. Further, the present fully pressure-dependent shale-and gas-property formulation allows for model-assisted extrapolation from the reference conditions to field conditions once the unknown model parameters have been estimated under laboratory conditions. The improved method provides a better match to the measurements of the pressure tests than previous models, which assume only Darcy flow.

Similar pressure pulse propagation and reflection characteristics in aortas of mammals

1991 ◽  
Vol 261 (3) ◽  
pp. R519-R521 ◽  
Author(s):  
J. K. Li ◽  
A. Noordergraaf
Keyword(s):  
Pulse Propagation ◽  
Pressure Pulse ◽  
Propagation Constant ◽  
Mammalian Species ◽  
Arterial System ◽  
Transmission Characteristics ◽  
Pulse Transmission ◽  
Propagating Waves ◽  
Flow Waveforms ◽  
Reflection Characteristics

Similar pressure and flow waveforms recorded in mammalian aortas suggest that pulse transmission characteristics may also be similar. We examined the validity of this hypothesis, utilizing allometric equations of pertinent hemodynamic parameters and a model of the arterial system. Results show that both the reflection coefficient and the propagation constant times the aortic length are essentially invariant across the mammalian species investigated. Resolved forward and reflected propagating waves are also similar. These findings suggest that the arterial system in these mammals indeed functions in a similar manner.

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