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Line 38: − − [[file:log-analysis-applications_fig1.png|left|thumb|{{figure number|1}}Interactive depth shifting. The user marks correlating inflection points and shifts off-depth traces to base trace depths.]] Line 48:
Line 46: − − [[file:log-analysis-applications_fig2.png|thumb|{{figure number|2}}Interactive [[Basic open hole tools#Spontaneous potential|spontaneous potential (SP)]] baseline flattening. The user selects points on the raw SP curve, which represent zero deflection (that is, baseline = 100% shale). By projecting the baseline between two consecutive points, SP deflections are calculated and redisplayed as a baselined (or “static”) SP.]] − + − + + + +
no edit summary
At the customer's request, digital wireline data can be transmitted from the logging truck's computer directly to (1) the client, (2) other partners, and/or (3) the logging company's main computer for immediate processing, retransmission, or rerecording for delivery to the client. When digital data are read into a computer by a LAP, they are automatically converted to the LAP's internal data format for storage and use.
At the customer's request, digital wireline data can be transmitted from the logging truck's computer directly to (1) the client, (2) other partners, and/or (3) the logging company's main computer for immediate processing, retransmission, or rerecording for delivery to the client. When digital data are read into a computer by a LAP, they are automatically converted to the LAP's internal data format for storage and use.
''Analog data'' include all data presented on paper or films:
''Analog data'' include all data presented on paper or films:
Traceplots can be converted to digital data through manual digitizing or optical scanning. Most LAPs include log digitizing software. Many commercial data firms also sell digitizing services and may even have digital libraries for sale. Numerical listings include core and geochemical data. Both are usually sampled somewhat sporadically and thus have varying sample increments. Text information includes descriptions, explanations, formation tops, and test results. This information is extremely useful when annotating graphics. Both numerical listings and text information are well suited for keyboard entry into the database.
Traceplots can be converted to digital data through manual digitizing or optical scanning. Most LAPs include log digitizing software. Many commercial data firms also sell digitizing services and may even have digital libraries for sale. Numerical listings include core and geochemical data. Both are usually sampled somewhat sporadically and thus have varying sample increments. Text information includes descriptions, explanations, formation tops, and test results. This information is extremely useful when annotating graphics. Both numerical listings and text information are well suited for keyboard entry into the database.
==Data editing==
==Data editing==
<gallery mode=packed heights=200px widths=200px>
[[file:log-analysis-applications_fig3.png|left|thumb|{{figure number|3}}A histogram display of a traces value range. Frequency nodes in a trace's data values (''x''<sub>1</sub>, and ''x''<sub>2</sub>) within a given formation are related to geology. Node values are usually consistent and mappable for that interval if observed in multiple wells in an area. If node values are atypical for a given well due to tool miscalibration, a correct distribution and range can be determined and the trace normalized.]]
log-analysis-applications_fig1.png|{{figure number|1}}Interactive depth shifting. The user marks correlating inflection points and shifts off-depth traces to base trace depths.
log-analysis-applications_fig2.png|{{figure number|2}}Interactive [[Basic open hole tools#Spontaneous potential|spontaneous potential (SP)]] baseline flattening. The user selects points on the raw SP curve, which represent zero deflection (that is, baseline = 100% shale). By projecting the baseline between two consecutive points, SP deflections are calculated and redisplayed as a baselined (or “static”) SP.
log-analysis-applications_fig3.png|{{figure number|3}}A histogram display of a traces value range. Frequency nodes in a trace's data values (''x''<sub>1</sub>, and ''x''<sub>2</sub>) within a given formation are related to geology. Node values are usually consistent and mappable for that interval if observed in multiple wells in an area. If node values are atypical for a given well due to tool miscalibration, a correct distribution and range can be determined and the trace normalized.
</gallery>
Options for editing of the data include the following:
Options for editing of the data include the following: