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Porosity
| chapter = Porosity ...most all hydrocarbon reservoirs are composed of sedimentary rocks in which porosity values generally vary from 10 to 40% in sandstones and from 5 to 25% in car

24 KB (3,450 words) - 19:09, 20 January 2022

Schematic of a pore system relating mineralogy, water content, and porosity assessment. (Notes: *lf sample is completely disaggregated during measureme

(1,942 × 983 (76 KB)) - 18:19, 14 January 2014

File:Porosity fig2.png
Idealized sandstone porosity system showing four basic pore types: intergranular, microporosity, dissolu

(936 × 434 (96 KB)) - 18:19, 14 January 2014

File:Porosity fig3.png

Idealized carbonate porosity system showing three basic porosity groups: fabric selective, not fabric selective, and fabric selective or not

(950 × 757 (24 KB)) - 18:19, 14 January 2014

File:Porosity fig4.png

Schematic diagram of packing arrangements for spheres. Porosity values are calculated for cubic (47.6%), orthorhombic (39.5%), rhombohedral

(1,895 × 1,463 (110 KB)) - 18:19, 14 January 2014

File:Porosity fig5.png
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File:Porosity fig6.png
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File:UGM Porosity Fig 5.png
(1,302 × 868 (246 KB)) - 18:49, 7 July 2015
File:UGM Porosity Fig 4.png
(988 × 942 (483 KB)) - 18:50, 7 July 2015
Density-neutron log porosity
...] data, especially in formations of complex lithology. Better estimates of porosity are possible with the combination than using either tool or sonic separatel ...y to porosity using charts in a log interpretation chartbook, or calculate porosity from bulk density using this equation:

12 KB (1,763 words) - 16:18, 5 April 2022
File:UGM Porosity Fig 3.png
(1,366 × 712 (212 KB)) - 18:50, 7 July 2015
Determining porosity from density–neutron logs
#REDIRECT [[Density-neutron log porosity]]

42 bytes (4 words) - 19:46, 14 January 2015
File:UGM Porosity Fig 13.png
(1,402 × 1,126 (147 KB)) - 18:48, 7 July 2015
File:UGM Porosity Fig 2.png
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File:UGM Porosity Fig 12.png
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File:UGM Porosity Fig 1.png
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Predicting sandstone reservoir porosity
...porosity. This section presents different methods of predicting sandstone porosity. Choose the method(s) most appropriate to your situation. ==Porosity-depth plots==

10 KB (1,384 words) - 15:00, 6 April 2022
File:UGM Porosity Fig 11.png
(1,332 × 1,108 (192 KB)) - 18:48, 7 July 2015
File:UGM Porosity Fig 10.png
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File:UGM Porosity Fig 9.png
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Page text matches

File:Thin-section-analysis fig1.png

...m of nonfracture porosity types in sandstones summarizing the influence of porosity type on reservoir quality. (Modified after Pittman, 1979.)

(933 × 870 (15 KB)) - 21:07, 14 January 2014

File:Evaluating-fractured-reservoirs fig1.png
...italic></sub>= matrix permeability, ϕ<sub><italic>r</italic></sub>= matrix porosity.

(942 × 642 (23 KB)) - 15:00, 14 January 2014

File:Porosity fig3.png

Idealized carbonate porosity system showing three basic porosity groups: fabric selective, not fabric selective, and fabric selective or not

(950 × 757 (24 KB)) - 18:19, 14 January 2014

Determining porosity from density–neutron logs
#REDIRECT [[Density-neutron log porosity]]

42 bytes (4 words) - 19:46, 14 January 2015
Determining porosity from density-neutron logs
#REDIRECT [[Density-neutron log porosity]]

42 bytes (4 words) - 16:56, 19 December 2014
Predicting sandstone porosity and permeability
#REDIRECT [[Sandstone porosity and permeability prediction]]

60 bytes (6 words) - 20:15, 19 May 2014
Basics of carbonate porosity formation and preservation
#REDIRECT [[Carbonate porosity formation and preservation]]

59 bytes (6 words) - 14:52, 19 December 2014
Core-log transformations and porosity-permeability relationships
#REDIRECT [[Core-to-log transformations and porosity-permeability relationships]]

81 bytes (6 words) - 15:37, 19 December 2014
File:Core-log-transformations-and-porosity-permeability-relationships fig2.png
Plot showing shitted core porosity, together with bulk density log.

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File:Core-log-transformations-and-porosity-permeability-relationships fig4.png

Air permeability versus helium porosity from North Sea sandstone, conglomerate, and shale.

(941 × 890 (53 KB)) - 18:06, 14 January 2014

File:Core-log-transformations-and-porosity-permeability-relationships fig1.png

Plot showing unshifted core porosity in spiked format, together with bulk density log.

(938 × 1,169 (73 KB)) - 18:05, 14 January 2014

File:Core-log-transformations-and-porosity-permeability-relationships fig5.png

Slip-corrected permeability (run under stress) versus helium porosity from McArthur River Field, Alaska.

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File:Core-log-transformations-and-porosity-permeability-relationships fig6.png

Permeability versus porosity for various size groups in uniformly cemented nonvuggy rocks. (Taken from L

(934 × 903 (17 KB)) - 18:06, 14 January 2014

File:Subsurface-maps fig5.png
Porosity-weighted average water saturation map for Layer 2 of a Middle Eastern carbo

(889 × 1,444 (71 KB)) - 20:42, 14 January 2014
File:Porosity fig2.png
Idealized sandstone porosity system showing four basic pore types: intergranular, microporosity, dissolu

(936 × 434 (96 KB)) - 18:19, 14 January 2014
File:Evaluating-diagenetically-complex-reservoirs fig3.png
Porosity-permeability semilog crosspiot with samples coded according to grain size,

(920 × 1,033 (84 KB)) - 18:46, 14 January 2014
Sandstone porosity and permeability prediction
...t on porosity and permeability, this subsection concentrates on predicting porosity and permeability by considering the effects of diagenesis. * [[Predicting sandstone reservoir porosity]]

2 KB (300 words) - 20:29, 5 April 2022