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• Quick-look lithology from logs
  | chapter = Quick-look lithology from logs ...quick-look interpretation can be made by visual inspection of appropriate logs.
  25 KB (3,637 words) - 19:39, 18 January 2022

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• Lithofacies analysis
  [[Lithofacies]] are interpreted from well data and [[Basics of seismic facies analysis|seismic facies]] descript # Learn as much as possible about the regional geology from well and [http://www.merriam-webster.com/dictionary/outcrop outcrop] contro
  2 KB (317 words) - 18:52, 4 February 2022
• Density-neutron log porosity
  ...nation than using either tool or sonic separately because inferences about lithology and fluid content can be made. ...ctron (P_e) [[cross section]] curve, an independent indicator of lithology.
  12 KB (1,763 words) - 16:18, 5 April 2022
• Formation evaluation of naturally fractured reservoirs
  Well logs can be considered as an indirect source of information. Sometimes they are ...er features such as a rough borehole, shales, and changes in [[porosity]], lithology, and tool centralization might produce amplitude drops that have nothing to
  9 KB (1,380 words) - 17:25, 18 January 2022
• Stratigraphic trap
  ...including [[Seismic interpretation|seismic]], [[Quick-look lithology from logs|well log]], [[Petroleum reservoir fluid properties|fluid character]], [[For
  1 KB (176 words) - 12:51, 3 July 2014
• Mudlogging: the mudlog
  ...es. This is necessary to allow valid and convenient comparison of log data from well to well and to prevent confusion or misunderstanding over the meaning ...dardize mudlog formats, present and previous mudlogs may differ in outline from this example.
  5 KB (752 words) - 15:39, 24 January 2022
• Rate of penetration
  ''Rate of penetration (ROP) logs'' are recorded at the wellsite as the well is being drilled. The ROP can be ...s one revolution in 8, 12, or 24 hr. To record depth, a small cable is run from the geolograph to the top of the kelly via a pulley on the crown of the der
  7 KB (1,049 words) - 19:02, 20 January 2022
• Seismic facies analysis
  ...on with lithofacies interpreted from [[Quick-look lithology from logs|well logs]], [[Core description|cores]], and [[Mudlogging: drill cuttings analysis|cu ...f> The table below<ref name=ch21r31 /> summarizes the information obtained from each parameter.
  6 KB (809 words) - 17:46, 4 February 2022
• Well log analysis for reservoir characterization
  ...re so many kinds of modern logs, see table 1 for the information about the logs and also their uses. | Gamma Ray (GR) || Lithology interpretation, shale volume calculation, calculate clay volume, permeabili
  25 KB (3,679 words) - 21:17, 13 March 2019
• Cased hole tools
  ...alinity are known. The porosity devices are used to estimate porosity when lithology is known. Table 1 lists the types of devices used for these purposes, and T ...asing, the encountered drop in pressure may cause the salts to precipitate from the waters and deposit on the casing near the perforations. These salts wil
  10 KB (1,427 words) - 16:26, 18 January 2022
• Quick-look lithology from logs
  | chapter = Quick-look lithology from logs ...quick-look interpretation can be made by visual inspection of appropriate logs.
  25 KB (3,637 words) - 19:39, 18 January 2022
• Measurement while drilling
  ...x|thumb|{{figure number|1}}Location of MWD hardware (not drawn to scale). (From <ref name=pt03r5>Anadrill,, 1988, Measurement While Drilling-Formation Logg ...ment-while-drilling_fig3.png|{{figure number|3}}Composite lithological log from MWD data.<ref name=pt03r42>Schlumberger, 1989, Prospector logging while dri
  8 KB (1,083 words) - 21:18, 19 January 2022
• Core description
  Careful examination and recording of information from continuous cores provide critical data for stratigraphic correlation, envir ...s possible. Porosity amounts in percent can be scaled as needed. (Modified from Casey.<ref name=pt05r32>Casey, J. M., 1980, Depositional systems and basin
  13 KB (1,786 words) - 20:50, 19 January 2022
• Procedure for geometrical analysis
  * Missing facies in a sequence, i.e., abrupt change from fluvial sandstone to marine shale * Changes in lithology as seen in cores that indicate subaerial exposure or nondeposition, as evid
  6 KB (862 words) - 15:20, 4 February 2022
• Full waveform acoustic logging
  ...des. P and S wave traveltimes and amplitudes provide information about the lithology and the fluid content of the formation. Stoneley wave velocity and amplitud ...ation interval being 5 μsec. The length of the time window recorded varies from 2 to 10 msec, depending on the source-receiver separations.<ref name=pt07r3
  10 KB (1,530 words) - 20:47, 19 January 2022
• Standard interpretation
  ...the process of determining volumes of hydrocarbons in place from wireline logs, or [[log interpretation]]. This process requires four basic steps: ...The most common methods for estimating shale volumes from gamma ray and SP logs are outlined here. Other measurements can be used under special conditions
  25 KB (3,776 words) - 19:53, 18 January 2022
• Open hole tools
  ...uration. The ''lithology and porosity'' devices are used to determine both lithology and porosity. A variety of ''auxiliary'' tools are used to make special log | rowspan = 3 | Correlation and lithology || Spontaneous potential
  23 KB (3,350 words) - 17:26, 18 January 2022
• Preprocessing of logging data
  ...es or digitized logs to the log processing environment: If paper copies of logs were digitized, all digital log data should be plotted and compared with th ;3. Collect all information related to the logs: Locate the headers for all logs, and identify the logging tool model used on each well and logging run. Col
  13 KB (2,094 words) - 17:42, 18 January 2022
• Well planning
  ...needed for correlation and evaluation. This includes maps, [[offset]] well logs, the well prognosis, and any other data that the geologist believes may be * Lithology
  6 KB (779 words) - 15:09, 24 January 2022
• Water resistivity determination
  The magnitude of deflection from the shale base line to the maximum deflection developed in a thick, clean, ...in example of calculation of water resistivity. Copyright: the SP method. (From Western Atlas International;<ref name=pt04r20>Western Atlas International,
  13 KB (2,077 words) - 17:26, 18 January 2022
• Mudlogging: drill cuttings analysis
  ...well is being drilled. The rock fragments are transported by the mudstream from the bit to the surface where they can be “caught” and analyzed (see [[L ...ee [[Show evaluation]]). Some of the activities that utilize data obtained from drill cuttings are summarized as follows:
  10 KB (1,482 words) - 15:25, 24 January 2022

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