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sandshale ratios

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Journal Article
Published: 03 July 2018
Bulletin of the Seismological Society of America (2018) 108 (5B): 3029–3045.
...Lianqing Zhou; Cuiping Zhao; Jun Luo; Zhangli Chen Abstract Combination of velocity, Poisson’s ratio, and attenuation structure is a powerful tool to investigate the characteristics of media, and it is especially useful to infer the lithology, porosity, water content of rocks, fluid infiltration...
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Journal Article
Journal: AAPG Bulletin
Published: 01 January 1960
AAPG Bulletin (1960) 44 (1): 83–100.
... are used to divide the map into areas of similar facies separated from adjoining facies by arbitrarily selected sandshale ratio and clastic ratio contours. These contour values are used as limiting ratios to subdivide the facies triangle. Either a color or a symbol is assigned to each...
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Journal Article
Journal: Geophysics
Published: 07 September 2016
Geophysics (2016) 81 (6): D573–D584.
... ). If the ratio between the wavelength λ and the average layer thickness d is such that λ / d ≫ 1 (1) the medium can be described as an effective medium. A layered sequence pertaining to this so-called long wavelength limit is often called finely layered. The effects of unresolved...
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Journal Article
Journal: AAPG Bulletin
Published: 01 April 1960
AAPG Bulletin (1960) 44 (4): 433–457.
... in a well (Standard Oil Company of California’s Woo No. 1, Sec. 19, T. 2 N., R. 15 W., S.B.B.M.), roughly half-way between the fan and source area, of the highest Mohnian sandshale ratio (about 1:1) of any of the central valley bore holes for which data were available to the writer. Much cobble conglomerate...
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Journal Article
Published: 01 April 2018
Clays and Clay Minerals (2018) 66 (2): 190–207.
..., was studied using mineralogical and chemical analysis. The mineralogical characteristics indicated that Mn goethite was present as nano-granular (<15 nm) or acicular (50–100 nm long, ~10 nm wide, i.e. high length/width ratio) crystals with low crystallinity. Groutite, ramsdellite, and pyrolusite were...
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Journal Article
Published: 01 April 1988
Bulletin of the Seismological Society of America (1988) 78 (2): 741–769.
... to explain coda-wave precursors and P/S spectral ratio , Paper presented at the European Seismological Commission Assembly at Kiel , West Germany . Gusev A. A. Lemzikov V. K. (1981...
Series: Investigations in Geophysics
Published: 01 January 1991
DOI: 10.1190/1.9781560802556.ch7
EISBN: 9781560802556
... Texas). Lithology estimation is illustrated, along with a measure of the limits of vertical resolution, in the San Miguel example of south Texas, while sandshale estimation, and isolation of channel sands, is demonstrated in the Empire-Abo Field of southeastern New Mexico. Identification of dolomite...
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Series: SEPM Gulf Coast Section Publications
Published: 01 December 2007
DOI: 10.5724/gcs.07.27.0554
EISBN: 978-0-9836096-3-6
... beds often with interlaminated current rippled sand. The sandshale ratio of this facies is approximately one. Figure 6. Pointe a Pierre Formation at San Fabien Road. (A) Rotated, thick-bedded sandstone of discordant sandstone and shale facies. Shale wedges are highlighted. (B) Dashed line separates...
Series: Geological Society, London, Special Publications
Published: 01 January 2000
DOI: 10.1144/GSL.SP.2000.167.01.04
EISBN: 9781862394155
... relation where ø is porosity and z is depth. We choose ø 0 = 0.56 and c = 0.39km-1, as suggested by Sclater & Christie (1980) for an averaged sandshale lithology in the North Sea. Subsequently, the reconstructed profiles for each time interval were obtained by correcting for the horizontal...
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