Effects of partial water saturation on attenuation in Massilon sandstone and Vycor porous glass

1982 ◽  
Vol 71 (6) ◽  
pp. 1458-1468 ◽  
Author(s):  
William F. Murphy
Keyword(s):  
Porous Glass ◽  
Water Saturation ◽  
Partial Water

scholarly journals Effect of Partial Water Saturation on Attenuation Characteristics of Low Porosity Rocks

2010 ◽  
Vol 44 (2) ◽  
pp. 245-251 ◽  
Author(s):  
Tae-Min Oh ◽  
Tae-Hyuk Kwon ◽  
Gye-Chun Cho
Keyword(s):  
Water Saturation ◽  
Attenuation Characteristics ◽  
Partial Water ◽  
Low Porosity

Seismic AVO variations related to partial water saturation during a pumping test

2007 ◽  
Author(s):  
Steven D. Sloan ◽  
Georgios P. Tsoflias ◽  
Don W. Steeples
Keyword(s):  
Water Saturation ◽  
Pumping Test ◽  
Partial Water

scholarly journals Depth characterization of shallow aquifers with seismic reflection, Part II—Prestack depth migration and field examples

Geophysics ◽  
2002 ◽  
Vol 67 (1) ◽  
pp. 98-109 ◽  
Author(s):  
John H. Bradford ◽  
D. S. Sawyer
Keyword(s):  
Seismic Reflection ◽  
Water Saturation ◽  
Compressional Wave ◽  
Unconsolidated Sediments ◽  
Prestack Depth Migration ◽  
Improve Image Quality ◽  
Depth Migration ◽  
Shallow Seismic ◽  
Partial Water

It is common in shallow seismic studies for the compressional‐wave velocity in unconsolidated sediments to increase by a factor of four or more at the transition from dry or partial water saturation to full saturation. Under these conditions, conventional NMO velocity analysis fails and leads to large depth and layer thickness estimates if the Dix equation is assumed valid. Prestack depth migration (PSDM) is a means of improving image accuracy. A comparison of PSDM with conventional NMO processing for three field examples from differing hydrogeologic environments illustrates that PSDM can significantly improve image quality and accuracy.

Laboratory study of partial water saturation in tight gas sandstone at seismic and ultrasonic frequencies

2014 ◽  
Author(s):  
X. Wei ◽  
S. X. Wang ◽  
J. G. Zhao ◽  
G. Y. Tang ◽  
H. J. Yin ◽  
...  
Keyword(s):  
Laboratory Study ◽  
Water Saturation ◽  
Tight Gas ◽  
Partial Water ◽  
Tight Gas Sandstone

scholarly journals Shallow seismic AVO variations related to partial water saturation during a pumping test

2007 ◽  
Vol 34 (22) ◽  
Author(s):  
Steven D. Sloan ◽  
Georgios P. Tsoflias ◽  
Don W. Steeples
Keyword(s):  
Water Saturation ◽  
Pumping Test ◽  
Shallow Seismic ◽  
Partial Water

scholarly journals Understanding NMR relaxometry of partially water-saturated rocks

2015 ◽  
Vol 19 (6) ◽  
pp. 2763-2773 ◽  
Author(s):  
O. Mohnke ◽  
R. Jorand ◽  
C. Nordlund ◽  
N. Klitzsch
Keyword(s):  
Relaxation Time ◽  
Cross Sections ◽  
Water Distribution ◽  
Water Saturation ◽  
Nmr Relaxation ◽  
Partial Saturation ◽  
Nmr Relaxometry ◽  
Nmr Relaxation Time ◽  
Water Saturated ◽  
Partial Water

Abstract. Nuclear magnetic resonance (NMR) relaxometry measurements are commonly used to characterize the storage and transport properties of water-saturated rocks. Estimations of these properties are based on the direct link of the initial NMR signal amplitude to porosity (water content) and of the NMR relaxation time to pore size. Herein, pore shapes are usually assumed to be spherical or cylindrical. However, the NMR response at partial water saturation for natural sediments and rocks may differ strongly from the responses calculated for spherical or cylindrical pores, because these pore shapes do not account for water menisci remaining in the corners of desaturated angular pores. Therefore, we consider a bundle of pores with triangular cross sections. We introduce analytical solutions of the NMR equations at partial saturation of these pores, which account for water menisci of desaturated pores. After developing equations that describe the water distribution inside the pores, we calculate the NMR response at partial saturation for imbibition and drainage based on the deduced water distributions. For this pore model, the NMR amplitudes and NMR relaxation times at partial water saturation strongly depend on pore shape, i.e., arising from the capillary pressure and pore shape-dependent water distribution in desaturated pores with triangular cross sections. Even so, the NMR relaxation time at full saturation only depends on the surface-to-volume ratio of the pore. Moreover, we show the qualitative agreement of the saturation-dependent relaxation-time distributions of our model with those observed for rocks and soils.

The impact of partial water saturation on rock strength: an experimental study on sandstone

2007 ◽  
Vol 158 (4) ◽  
pp. 869-882 ◽  
Author(s):  
Manuela Morales Demarco ◽  
Eberhard Jahns ◽  
Jörg Rüdrich ◽  
Pedro Oyhantcabal ◽  
Siegfried Siegesmund
Keyword(s):  
Experimental Study ◽  
Rock Strength ◽  
Water Saturation ◽  
The Impact ◽  
Partial Water

scholarly journals Pore connectivity, electrical conductivity, and partial water saturation: Network simulations

2015 ◽  
Vol 120 (6) ◽  
pp. 4055-4068 ◽  
Author(s):  
M. Li ◽  
Y. B. Tang ◽  
Y. Bernabé ◽  
J. Z. Zhao ◽  
X. F. Li ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Water Saturation ◽  
Pore Connectivity ◽  
Network Simulations ◽  
Partial Water
Sign in / Sign up

Export Citation Format

Share Document