1-20 OF 84 RESULTS FOR

mudcake

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article
Published: 01 August 2012
Russ. Geol. Geophys. (2012) 53 (8): 823–828.
...A.V. Sinev; E.I. Romensky; V.N. Dorovsky Abstract A mudcake formed on the borehole wall between a fluid-filled porous formation and the borehole fluid can affect Stoneley wave propagation used to estimate the formation permeability. The mudcake effect on the permeability dependence of radial...
FIGURES | View All (11)
Image
(a) Radial and vertical geometric factors of the (left column) LS and (righ...
Published: 20 January 2010
Figure 14. (a) Radial and vertical geometric factors of the (left column) LS and (right column) SS detectors of the assumed density logging tool in the presence of no mudcake, 2.54 - cm light ( 1 g ∕ cm 3 ) mudcake, and 2.54 - cm heavy ( 2.74 g ∕ cm
Image
Time-dependent extreme magnitudes of acoustic fluid pressure at fluid/mudca...
Published: 01 August 2012
Fig. 9. Time-dependent extreme magnitudes of acoustic fluid pressure at fluid/mudcake interface, for mudcake thickness 1.0 × 10 −3 m, at different permeabilities, and approximation of the dependence by e −α t .
Image
Time-dependent extreme magnitudes of acoustic fluid pressure at fluid/mudca...
Published: 01 August 2012
Fig. 10. Time-dependent extreme magnitudes of acoustic fluid pressure at fluid/mudcake interface, for mudcake thickness 3.0 × 10 −3 m, at different permeabilities, and approximation of the dependence by e −α t .
Image
(a) SP log for two permeable beds with variable petrophysical parameters af...
Published: 09 November 2020
invasion. The yellow rectangles in panels (b) and (c) represent the plausible zones where mudcake can develop without considerable formation damage. The presence of mudcake does not affect the SP logs associated with cases (b or c) because radial salt concentration gradients extend considerably beyond
Image
Model system consisting of a borehole in a porous formation and a <span class="search-highlight">mudcake</span> o...
Published: 01 August 2012
Fig. 1. Model system consisting of a borehole in a porous formation and a mudcake on the borehole wall. See text for explanation.
Image
Permeability dependence of Stoneley attenuation for different <span class="search-highlight">mudcake</span> thick...
Published: 01 August 2012
Fig. 2. Permeability dependence of Stoneley attenuation for different mudcake thicknesses.
Image
Permeability dependence of Stoneley velocity for a <span class="search-highlight">mudcake</span> being an elastic...
Published: 01 August 2012
Fig. 5. Permeability dependence of Stoneley velocity for a mudcake being an elastic layer.
Image
Time-dependent pressure for <span class="search-highlight">mudcake</span> thickness 1 mm and permeability 1 mD, a...
Published: 01 August 2012
Fig. 8. Time-dependent pressure for mudcake thickness 1 mm and permeability 1 mD, and approximation of extremes by e −5142.8 t .
Image
Comparison of MCNP simulations and rapid approximation of (1D radial pertur...
Published: 20 January 2010
Figure 19. Comparison of MCNP simulations and rapid approximation of (1D radial perturbation) density measurements against simulations with (a) 2.54 - cm light mudcake and (b) 2.54 - cm heavy mudcake. The left panel describes LS and SS density approximations. The second
Image
MCNP simulations and rapid approximation of (2D radial and vertical) densit...
Published: 20 January 2010
Figure 20. MCNP simulations and rapid approximation of (2D radial and vertical) density measurements and simulations with (a) 2.54 - cm light mudcake and (b) no mudcake in the presence of shoulder-bed effects for 40 - cm -thick layers. The left two panels describe MCNP
Journal Article
Journal: Geophysics
Published: 20 January 2010
Geophysics (2010) 75 (1): E9–E29.
...Figure 14. (a) Radial and vertical geometric factors of the (left column) LS and (right column) SS detectors of the assumed density logging tool in the presence of no mudcake, 2.54 - cm light ( 1 g ∕ cm 3 ) mudcake, and 2.54 - cm heavy ( 2.74 g ∕ cm...
FIGURES | View All (24)
Journal Article
Journal: Geophysics
Published: 15 August 2006
Geophysics (2006) 71 (4): F101–F119.
... and fluid properties. We give special consideration to the assumption of specific mud properties that determine the time evolution of mudcake growth and permeability and, consequently, the time evolution of flow rate of mud-filtrate invasion. Our objective is to estimate layer-by-layer permeability...
FIGURES | View All (20)
Image
Permeability dependence of attenuation (exponent of α that approximates ext...
Published: 01 August 2012
Fig. 11. Permeability dependence of attenuation (exponent of α that approximates extreme magnitudes of acoustic fluid pressure) at borehole/formation interface, for mudcake thicknesses 1.0 × 10 −3 m and 3.0 × 10 −3 m.
Journal Article
Journal: Geophysics
Published: 01 February 1993
Geophysics (1993) 58 (2): 298–306.
... and mudcake surrounding a drillhole, natural impact craters, human induced craters and underground explosions, and some volcanic and intrusive structures. Occasionally, gravity surveys are conducted in boreholes or vertical shafts that may or may not coincide with the axis of symmetry. The formulations...
Series: AAPG Studies in Geology
Published: 01 January 1987
DOI: 10/1306/St25468C25
EISBN: 9781629811406
... rocks. These differences resulted from less accurate compensation of gamma-gamma readings for formation damage, mudcake, drillhole enlargement, and rugosity rather than from errors in BHG densities that were very small. Core samples were used to provide grain density needed to calculate porosity from...
Journal Article
Journal: Geophysics
Published: 01 November 1985
Geophysics (1985) 50 (11): 1756–1778.
.... They also facilitate the interpretation of some of the physical phenomena which occur during the propagation in a complex borehole environment.We present the configurations of a well-bonded and unbonded cased hole, an invaded zone, and a mudcake. For all of these models, we consider a 'fast' formation...
Journal Article
Journal: Geophysics
Published: 01 June 1984
Geophysics (1984) 49 (6): 796–809.
...L. J. Baker Abstract The body of this report is devoted to studying the effect of the invaded zone, mudcake, or steel casing on the components of the full wavetrain (P-wave, S-wave, reflected modes, and Stoneley mode). I conclude that a sonic logging tool has a very shallow depth of investigation...
Journal Article
Journal: Geophysics
Published: 18 September 2012
Geophysics (2012) 77 (6): D209–D227.
... (including time of invasion, mud and mudcake properties, and overbalance pressure/average invasion flow rate). Numerical simulation of mud-filtrate invasion yields the postinvasion radial distribution of water saturation. Rocks are assumed water wet, whereas rock-fluid properties such as saturation-dependent...
FIGURES | View All (14)
Journal Article
Journal: The Leading Edge
Published: 01 May 2013
The Leading Edge (2013) 32 (5): 504–512.
... (%) Clay content (%) Reservoir with mud (invaded zone)/mudcake 1.41 29 25 Reservoir saturated with brine 0.46 30 25 Reservoir saturated with brine and CO 2 0.88 30 25 Cap rock with mud (invaded zone)/mudcake 3.13 11 50 Mud (30%) + CO 2 (70%) 3.13 100 0 Cap rock...
FIGURES | View All (8)