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- 22:39, 13 January 2014 diff hist +160 N File:Sidewall-coring fig1.png {{copyright|Halliburton Logging Services, Inc}} Percussion sidewall coring system. Copyright: Halliburton Logging Services, Inc. Category:Wellsite methods current
- 22:39, 13 January 2014 diff hist +7,657 N Sidewall coring Initial import
- 22:39, 13 January 2014 diff hist +449 N File:Overview-of-routine-core-analysis fig3.png Data compiled from 5300 sidewall core samples indicate that sidewall cores from low permeability formations have an indicated permeability greater than that determined from conventional core analysis. Sidewall cores from formations with more than 20 md... current
- 22:39, 13 January 2014 diff hist +403 N File:Overview-of-routine-core-analysis fig2.png Comparison of saturation data (Jenkins, 1987) indicate that sidewall cores from gas condensate zones may have measured oil saturation values that are 2% higher than conventional core samples. In oil zones the relationship is less clear. The agreement b... current
- 22:39, 13 January 2014 diff hist +320 N File:Overview-of-routine-core-analysis fig1.png Comparison of water saturation data (Jenkins, 1987) from sidewall and conventional cores shows that sidewall core values are almost always higher than conventional core values. Sample values from gas condensate zones are 10 to 15% higher, while values ... current
- 22:39, 13 January 2014 diff hist +14,888 N Overview of routine core analysis Initial import
- 22:38, 13 January 2014 diff hist +57 N File:Core-orientation fig3.png Paleomagnetic plug sample. Category:Wellsite methods current
- 22:38, 13 January 2014 diff hist +56 N File:Core-orientation fig2.png Scribe knife arrangement. Category:Wellsite methods current
- 22:38, 13 January 2014 diff hist +80 N File:Core-orientation fig1.png Typical assembly for mechanically orienting core. Category:Wellsite methods current
- 22:38, 13 January 2014 diff hist +13,085 N Core orientation Initial import
- 22:38, 13 January 2014 diff hist +7,075 N Core handling Initial import
- 22:38, 13 January 2014 diff hist +206 N File:Core-description fig2.png (a) Comparison chart for sorting and sorting classes. (Modified from Pettijohn et al. 1987.) (b) Comparison chart for roundness and sphericity. (Modified from Powers, 1953.) Category:Laboratory methods current
- 22:38, 13 January 2014 diff hist +469 N File:Core-description fig1.png Idealized graphic log. Explanation for some symbols used for sedimentary structures, lithologies, fossils, and contacts are given. Grain size of sillclclastic rocks and Dunham's (1962) classification of limestones are indicated in the column on the lef... current
- 22:38, 13 January 2014 diff hist +11,955 N Core description Initial import
- 22:38, 13 January 2014 diff hist +391 N File:Core-alteration-and-preservation fig1.png {{copyright|reservoir to surface. (a)Oil-productive formation. (b) Gas-productive formation. (Courtesy of Core Laboratories, a Division of Western Atlas International}} Typical fluid contents. Copyright: reservoir to surface. (a)Oil-productive formati... current
- 22:38, 13 January 2014 diff hist +80 N File:Conventional-coring fig3.png Full-closure core catcher. (From Whitebay, 1986.) Category:Wellsite methods current
- 22:38, 13 January 2014 diff hist +129 N File:Conventional-coring fig2.png {{copyright|DBS, a Baroid Company}} Sponge-lined coring system. Copyright: DBS, a Baroid Company. Category:Wellsite methods current
- 22:37, 13 January 2014 diff hist +179 N File:Conventional-coring fig1.png {{copyright|Eastman Christensen, Technical Data Sheet C-105}} Conventional core barrel. Copyright: Eastman Christensen, Technical Data Sheet C-105. Category:Wellsite methods current
- 22:37, 13 January 2014 diff hist +13,155 N Conventional coring Initial import
- 22:33, 13 January 2014 diff hist +209 N File:Using-and-improving-surface-models-built-by-computer fig24.png Incomplete data for net and porosity due to partial penetrations, truncations, baselaps, and so on create problems when building models of these and related variables. Category:Integrated computer methods current
- 22:33, 13 January 2014 diff hist +228 N File:Using-and-improving-surface-models-built-by-computer fig23.png The envelope technique is used to define one grid for the top of reservoir and another for the base of the reservoir. These are subtracted to create the gross hydrocarbon rock thickness. Category:Integrated computer methods current
- 22:33, 13 January 2014 diff hist +231 N File:Using-and-improving-surface-models-built-by-computer fig22.png The gross hydrocarbon rock thickness is progressively reduced by net to gross ratio, average porosity, and oil saturation, until only the thickness of pores filled with hydrocarbon remains. Category:Integrated computer methods current
- 22:33, 13 January 2014 diff hist +149 N File:Using-and-improving-surface-models-built-by-computer fig21.png Thickness Is normally defined by grids representing the top and base of reservoir and the fluid contact(s). Category:Integrated computer methods current
- 22:33, 13 January 2014 diff hist +249 N File:Using-and-improving-surface-models-built-by-computer fig20.png A mathematical surface is fit to the grid cell. Calculus is used to integrate the volume under the curve, inside the grid cell, and inside the polygon. All cell volumes inside the polygon are added together. Category:Integrated computer methods current
- 22:32, 13 January 2014 diff hist +303 N File:Using-and-improving-surface-models-built-by-computer fig19.png The cell's corners are defined by grid nodes. The top is defined by two or more planes passing through the node z values and lie inside the polygon. The prism of volume under each plane is calculated and added to volumes for all other prisms inside the... current
- 22:32, 13 January 2014 diff hist +259 N File:Using-and-improving-surface-models-built-by-computer fig18.png The cell is centered on the grid node and lies either inside or outside the polygon. The cell's area is multiplied by its z value (thickness) and that volume is added to volumes for all other cells inside the polygon. [[Category:Integrated computer me... current
- 22:32, 13 January 2014 diff hist +196 N File:Using-and-improving-surface-models-built-by-computer fig17.png The data value is adjusted by the separation of faults crossed by the line connecting the data point and the location for which an estimate is being made. Category:Integrated computer methods current
- 22:32, 13 January 2014 diff hist +334 N File:Using-and-improving-surface-models-built-by-computer fig16.png (a) Surface model built with no fault constraints. (b) Model of vertical separation. (c) Unfaulted structure model built after removing vertical separation from data. (d) Faulted structure model built by subtracting separation model from unfaulted stru... current
- 22:32, 13 January 2014 diff hist +416 N File:Using-and-improving-surface-models-built-by-computer fig15.png Faults act as barriers beyond which data cannot be seen from the location for which a surface value is being calculated. (a) A grid node (indicated by +) to the west of fault A can only see data in the hatchured area. (b) A grid node farther to the sou... current
- 22:32, 13 January 2014 diff hist +217 N File:Using-and-improving-surface-models-built-by-computer fig14.png Surface models are constructed for the faults and for each surface on each side of each fault. Operations between surface models prevent them from projecting past one another. Category:Integrated computer methods current
- 22:32, 13 January 2014 diff hist +355 N File:Using-and-improving-surface-models-built-by-computer fig13.png Separate surface models are built for each fault block. (a, b, and c) The surface for each fault block is allowed to extend past faults defining the block edge. (d) When displayed, contours are constrained to inside the fault block polygon and all mode... current
- 22:32, 13 January 2014 diff hist +250 N File:Using-and-improving-surface-models-built-by-computer fig12.png The middle surface baselaps onto the lower surface and is truncated by the higher surface. (a) Cross section showing proper relationships. (b) Map showing surface contours and lines of baselap and truncation. Category:Integrated computer methods current
- 22:32, 13 January 2014 diff hist +81 N File:Using-and-improving-surface-models-built-by-computer fig11.png Map showing contours and subcrop lines. Category:Integrated computer methods current
- 22:32, 13 January 2014 diff hist +193 N File:Using-and-improving-surface-models-built-by-computer fig10.png Cross section showing surfaces before baselap operations. The zero contour of the model built by subtracting the two surfaces defines the subcrop line. Category:Integrated computer methods current
- 22:32, 13 January 2014 diff hist +233 N File:Using-and-improving-surface-models-built-by-computer fig9.png Cross sections showing a baselapping surface (a) as coincident with the lower surface in areas of baselap (for cross section display) and (b) as missing in areas of baselap (for map display). Category:Integrated computer methods current
- 22:32, 13 January 2014 diff hist +166 N File:Using-and-improving-surface-models-built-by-computer fig8.png Cross sections showing that surfaces that intersect due to (a) baselap or (b) truncation will incorrectly cross one another. Category:Integrated computer methods current
- 22:32, 13 January 2014 diff hist +225 N File:Using-and-improving-surface-models-built-by-computer fig7.png Cross section showing four conformable surfaces. The second from the top is the control and is modeled using structure data. The other surfaces are built using the conformable method. Category:Integrated computer methods current
- 22:32, 13 January 2014 diff hist +259 N File:Using-and-improving-surface-models-built-by-computer fig6.png Cross section showing two conformable surfaces. Dashed line represents direct modeling of lower surface data. Solid lines represent direct modeling of upper surface data and conformable modeling of lower surface data. [[Category:Integrated computer me... current
- 22:32, 13 January 2014 diff hist +258 N File:Using-and-improving-surface-models-built-by-computer fig5.png Contour maps of the same data. (a) Most algorithms weight data isotropically and creat circular surface forms. (b) Single direction bias forces elliptical weighting, allowing surface form to stretch in one direction. [[Category:Integrated computer met... current
- 22:32, 13 January 2014 diff hist +268 N File:Using-and-improving-surface-models-built-by-computer fig4.png Cross sections through the same data. (a) The surface model does not honor the data. (b) Surface is shifted to data by modeling the error between the data and the original surface and then adding the original and error models. [[Category:Integrated co... current
- 22:32, 13 January 2014 diff hist +362 N File:Using-and-improving-surface-models-built-by-computer fig3.png Cross sections through the same data. (a) Extrapolated values for a weighted average algorithm tend to “come back” to the average of near data values. (b) Acceptable surface extrapolation achieved by creating a first-order trend, modeling residuals... current
- 22:32, 13 January 2014 diff hist +188 N File:Using-and-improving-surface-models-built-by-computer fig2.png Cross section showing the output from filtering being constrained between models built by shifting the initial surface model up and down slightly. Category:Integrated computer methods current
- 22:32, 13 January 2014 diff hist +177 N File:Using-and-improving-surface-models-built-by-computer fig1.png Contour maps of the same surface data. (a) Unconstrained extrapolation into nondata areas. (b) Contours constrained to areas near data. Category:Integrated computer methods current
- 22:32, 13 January 2014 diff hist +39,375 N Using and improving surface models built by computer Initial import
- 22:06, 13 January 2014 diff hist +150 N File:Introduction-to-contouring-geological-data-with-a-computer fig6.png A13 × 13 grid showing the relationship between grid nodes and control points for the Davis (1973) data set. Category:Integrated computer methods current
- 22:06, 13 January 2014 diff hist +173 N File:Introduction-to-contouring-geological-data-with-a-computer fig7.png A representation of the fourth-order polynomial of Figure 4 contoured on a grid prepared using a nearest neighbor search criterion. Category:Integrated computer methods current
- 22:06, 13 January 2014 diff hist +127 N File:Introduction-to-contouring-geological-data-with-a-computer fig5.png Contours from a 13 × 13 grid using nearest neighbor search. (Data from Davis, 1973.) Category:Integrated computer methods current
- 22:06, 13 January 2014 diff hist +132 N File:Introduction-to-contouring-geological-data-with-a-computer fig4.png Surface contoured on a triangular mesh. The original surface is a fourth-order polynomial. Category:Integrated computer methods current
- 22:06, 13 January 2014 diff hist +80 N File:Introduction-to-contouring-geological-data-with-a-computer fig3.png Contoured triangular mesh of Figure 2. Category:Integrated computer methods current
- 22:06, 13 January 2014 diff hist +90 N File:Introduction-to-contouring-geological-data-with-a-computer fig2.png Triangular mesh prepared from Davis (1973) data. Category:Integrated computer methods current