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• Gravity in petroleum exploration
  ...]] meter are effective in locating [[fault]]s and geologic structures with density contrasts to their surroundings. The borehole gravity meter has broad appli
  1 KB (187 words) - 17:53, 25 January 2022

• File:M91Ch6FG43.JPG Gamma-ray, density, neutron, and sonic log response of a sandstone and shale sequence. This ex (800 × 827 (107 KB)) - 17:07, 3 June 2015

• Top seal ductility estimation
  ...a top seal]] can be estimated (1) by using laboratory data and log-derived density values that reflect the compaction state or (2) by comparing the strains in ==Shale ductility and density==
  7 KB (1,000 words) - 15:22, 30 March 2022
• Seismic data: building a stratigraphic model
  ...ere there is a contrast in impedance (which is the product of velocity and density). Depth-dependent velocity and density models are needed to identify events or to create a synthetic seismogram. V
  5 KB (805 words) - 19:06, 27 January 2022

• File:Pressure-detection fig2.png ...of pressure above normal follows the aquathermal gradient (constant water density) and then follows the fracture gradient. (After Barker and Horsfeld, 1982.) (942 × 1,519 (43 KB)) - 18:23, 14 January 2014

• Static gas pressure gradient estimation
  ...density. Static gas pressure gradients can be estimated if subsurface gas density is known or has been estimated. Subsurface gas density is dependent on the ratio of its mass to its volume. Mass is related to the
  7 KB (979 words) - 15:24, 17 February 2022
• Pressure prediction: analysis of cuttings
  ==Density of shale cuttings== ==Measuring shale cuttings density==
  5 KB (818 words) - 17:56, 17 February 2022
• Hydrocarbon pressure gradient: plotting
  #* Measured hydrocarbon [[Wikipedia:Density|density]] #* Estimates of hydrocarbon density
  3 KB (381 words) - 17:54, 17 February 2022
• Density-neutron log porosity
  The combination of the density and neutron logs provides a good source of [[porosity]] data, especially in ==Density log==
  12 KB (1,763 words) - 16:18, 5 April 2022
• Interpreting gravity measurements
  ...odel sections. Divide the section into intervals of approximately the same density. ...ment rocks are not closer to the surface. These structures may be of lower density than the surrounding rocks.
  5 KB (725 words) - 18:00, 24 January 2022
• Hydrostatic pressure-depth plot construction
  * Pressures calculated from water density ...culate the gradient from the water density using [[Formation water density|density measured from the formation water]] or calculated from the [[Spontaneous po
  7 KB (895 words) - 18:57, 16 February 2022
• Methods for obtaining formation fluid pressures
  * Calculating hydrostatic pressures from measured water density or salinity * Estimating hydrostatic pressures from fluid density using R_w (formation water resistivity)
  2 KB (295 words) - 17:54, 17 February 2022
• Buoyancy pressure
  ...occur together, they create a buoyancy pressure that is a function of the density difference between the two fluids and the length of the less-dense fluid co * ρ_w = density of water, g/cm³
  4 KB (596 words) - 18:37, 17 February 2022
• Borehole gravity applications: examples
  ...density measurements and the gamma-gamma log density measurements. (right) Density values measured by the BHGM (left line) and the gamma-gamma tools (right li ...aused by a remote higher [[porosity]] zone not detected by the gamma-gamma density log. The broader difference anomaly observed over the length of the interva
  11 KB (1,596 words) - 18:08, 24 January 2022
• Pressure prediction: analysis of well-log and seismic data
  [[Basic open hole tools#Resistivity|Resistivity]], sonic, and density logs (as well as some others) can give clues to the presence of over- or un ...depth, mark the value of resistivity, conductivity, sonic travel time, or density.
  5 KB (733 words) - 17:57, 17 February 2022
• Migration rate calculation
  ...a, including [[permeability]] of carrier beds, [[viscosity]] of oil, fluid density, and [http://www.glossary.oilfield.slb.com/en/Terms/p/pore_pressure.aspx po * ρ_hc = hydrocarbon density (kg/m³)
  4 KB (618 words) - 19:40, 14 February 2022
• Borehole gravity
  ...n 6330 and 6370 ft is caused by porosity not detected by the gamma-gamma [[density log]]. The broader difference anomaly observed over the length of the logge ...e [[gravity]] meter (BHGM) can be described simply as a deep-investigating density logging tool. Applications range beyond this simple description to include
  10 KB (1,517 words) - 15:54, 20 January 2022
• Using conventional well logs to estimate richness
  ...ydrogen and carbon contents. All of these attributes can be measured using density sonic, neutron, [[Basic open hole tools#Gamma ray|gamma ray]], and [[Basic | Density || Low (approx. 1 g/cm³ ) || Similar to pore fluids
  5 KB (768 words) - 15:48, 9 February 2022
• Borehole gravity tool
  ...tion_fig15-10.png|300px|thumb|{{figure number|1}}Fundamentals of measuring density using a borehole gravity sensor. From Schowalter;<ref name=Schowalter1979>S ...y of the intervening layer. The result is a direct computation of the bulk density of that layer.
  5 KB (720 words) - 18:07, 24 January 2022
• API gravity
  ...of the American Petroleum Institute (API) that is inversely related to the density of liquid petroleum: API [[gravity]] = (141.5&deg;/[secific gravity at 16&d
  951 bytes (140 words) - 14:03, 25 February 2016

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