Characterizing Disproportionate Permeability Reduction Using Synchrotron X-Ray Computed Microtomography

2001 ◽  
Author(s):  
R.S. Seright ◽  
J. Liang ◽  
W. Brent Lindquist ◽  
John H. Dunsmuir
Keyword(s):  
Permeability Reduction ◽  
X Ray ◽  
Computed Microtomography ◽  
X Ray Computed

X-Ray Computed Microtomography Studies of Fluid Partitioning in Drainage and Imbibition Before and After Gel Placement: Disproportionate Permeability Reduction

SPE Journal ◽  
2006 ◽  
Vol 11 (02) ◽  
pp. 159-170 ◽  
Author(s):  
Randall S. Seright ◽  
Masa Prodanovic ◽  
W. Brent Lindquist
Keyword(s):  
Porous Media ◽  
Permeability Reduction ◽  
Water Drainage ◽  
X Ray ◽  
Before And After ◽  
Production Wells ◽  
Computed Microtomography ◽  
X Ray Computed ◽  
Phase Water ◽  
Minimal Reduction

Summary X-ray computed microtomography (XMT) was used to establish why pore-filling Cr(III)-acetate-HPAM gels reduced permeability to water much more than to oil. Our results suggest that permeability to water was reduced to low values because water must flow through gel itself, whereas oil pressing on the gel in Berea sandstone or porous polyethylene forced pathways by dehydration—leading to relatively high permeability to oil. In very permeable sandpacks, data from other researchers support ripping or extrusion mechanisms for creating oil pathways. Our XMT studies provide interesting insights into imbibition and drainage processes in water-wet and oil-wet porous media even before gel placement. Many of our observations were consistent with conventional wisdom. However, some were unexpected. Residual wetting-phase (water) saturations in Berea were surprisingly low-valued in small pores. We attribute this to surface roughness caused by clay coating on Berea's pore walls, which allowed efficient water drainage from small pores during oil injection. Introduction Gels have often been injected into production wells in an effort to reduce water production without seriously damaging hydrocarbon productivity. To be effective, the gels must significantly reduce permeability to water while causing minimal reduction in permeability to oil. Many gels exhibit this disproportionate permeability reduction, but the property has not been as predictable as we would like. If the mechanism for this property were understood, gel treatments could be applied with greater reliability. To determine this mechanism for a Cr(III)-acetate-HPAM gel, we used XMT. As an important prelude to investigating gel behavior in porous media, XMT was used to characterize imbibition and drainage processes in water-wet and oil-wet porous media before gel placement.

Determination of reservoir rock residual water using X-ray computed microtomography

2018 ◽  
pp. 38-42 ◽  
Author(s):  
I.V. Yazynina ◽  
◽  
E.V. Shelyago ◽  
A.A. Abrosimov ◽  
N.E. Grachev ◽  
...  
Keyword(s):  
Reservoir Rock ◽  
Residual Water ◽  
X Ray ◽  
Computed Microtomography ◽  
X Ray Computed

Acoustic emission and X-ray computed microtomography characterization of damage accumulation in a woven Cf/SiC composite

2019 ◽  
Vol 155 ◽  
pp. 109748
Author(s):  
Yudong Xue ◽  
Qinglei Wang ◽  
Jianbao Hu ◽  
Haijun Zhou ◽  
Qingliang Shan ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Damage Accumulation ◽  
X Ray ◽  
Computed Microtomography ◽  
X Ray Computed

scholarly journals Author Correction: A quantitative analysis of 3D-cell distribution in regenerative muscle-skeletal system with synchrotron X-ray computed microtomography

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Markéta Tesařová ◽  
Lucia Mancini ◽  
Andras Simon ◽  
Igor Adameyko ◽  
Markéta Kaucká ◽  
...  
Keyword(s):  
Quantitative Analysis ◽  
Cell Distribution ◽  
Skeletal System ◽  
X Ray ◽  
Computed Microtomography ◽  
X Ray Computed

X-ray computed microtomography for the structural analysis of jewelry from the Museum “Royal Tombs of Sipán”

2020 ◽  
Vol 35 (S1) ◽  
pp. S38-S42
Author(s):  
Soraia Rodrigues de Azeredo ◽  
Roberto Cesareo ◽  
Angel Guillermo Bustamante Dominguez ◽  
Ricardo Tadeu Lopes
Keyword(s):  
Structural Analysis ◽  
High Resolution ◽  
Copper Alloys ◽  
North Coast ◽  
Flat Panel ◽  
X Ray ◽  
The North ◽  
Gold Silver ◽  
Computed Microtomography ◽  
X Ray Computed

Precious ornaments from the Museum Royal Tombs of Sipán were analyzed by X-ray computed microtomography (microCT). The ornaments analyzed were golden earrings produced by the Moche culture that flourished along the north coast of present-day Peru between approximately 100 and 600 AD. Sipán, also known as Huava Rajada, is a mochica archaeological complex in the north of Peru. In particular, the spectacular jewelry, mainly composed of gold, silver, and copper alloys, gilded copper, and tumbaga, from the Museum “Royal Tombs of Sipán,” in Lambayeque, north of Peru, are some of the most sophisticated metalworking ever produced of pre-Columbian America. A portable microCT system consisting of a high-resolution flat panel detector and a mini X-ray tube were used for the structural analysis of these ornaments. The microCT images show parts of the internal structure, highlighting the manufacturing technique and gold sheets joining techniques of the Moche artisans. Furthermore, the advantage of using the portable microCT system for nondestructive testing is clear when the sample cannot be taken to the laboratory.

scholarly journals Assessment of stone heritage decay by X-ray computed microtomography: I - a case study of Portuguese Braga granite

2015 ◽  
Vol 21 (S6) ◽  
pp. 160-161 ◽  
Author(s):  
A. Maurício ◽  
C. Figueiredo ◽  
M.F. Pereira ◽  
C. Alves ◽  
M. Bergounioux ◽  
...  
Keyword(s):  
X Ray ◽  
Computed Microtomography ◽  
X Ray Computed
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