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From Open Energy Information

Cement Bond Log
BestPractices Analysis and interpretation of a cement bo
Analysis and interpretation of a cement bond log is necessary to assure integrity of the cement job, and if an adequate bond is not present throughout the interval the drilling contractor will be required to place plugs and perforate the casing and squeeze cement (perf and squeeze) into the zone. A cement bond log is required to determine whether the perf and squeeze was effective.
hether the perf and squeeze was effective.  +
DataAcquisition A circuit is employed to convert the difference in time of arrival of the P-wave at the two detectors to transit time (t) in ms/ft.  +
EnvironmentalMitigation Cement bond logs are required to evaluate
Cement bond logs are required to evaluate the isolation and protection of usable mineral resources, ground water aquifers. This protection an isolation is generally required in federally approved wells to a depth of 2,000' in non geothermal wells. Geothermal wells are cemented behined each casing string.
s are cemented behined each casing string.  +
EstimatedCostHighUSD 300 centUSD (0.003 kUSD, 3.0e-6 MUSD, 3.0e-9 TUSD)  +
EstimatedCostLowUSD 85 centUSD (8.5e-4 kUSD, 8.5e-7 MUSD, 8.5e-10 TUSD)  +
EstimatedCostMedianUSD 125 centUSD (0.00125 kUSD, 1.25e-6 MUSD, 1.25e-9 TUSD)  +
EstimatedTimeHigh 0.00189 years (16.56 hours, 0.69 days, 0.0986 weeks, 0.0227 months)  +
EstimatedTimeLow 9.582478e-4 years (8.4 hours, 0.35 days, 0.05 weeks, 0.0115 months)  +
EstimatedTimeMedian 0.00126 years (11.04 hours, 0.46 days, 0.0657 weeks, 0.0151 months)  +
ExplorationCostPerMetric foot  +
ExplorationGroup Downhole Techniques +
ExplorationSubGroup Well Log Techniques +
ExplorationTimePerMetric job  +
FieldProcedures The geophysical/well logging service company conducts the down hole logging operation and produces both digital and hard copy logs. The Drilling contractor trips the drill pipe and bit and conditions the well bore for logging.  +
GeoUse A cement bond log can be done to test the integrity of a geothermal exploration well. +
NEPAanalysis Well logging is a standard operation assoc
Well logging is a standard operation associated with the drilling permit approval and is included in the down hole analysis of the drilling program. A cement bond log is required to determine whether there is an adequate bond between the casing and well bore. if the analysis of the cement bond logs indicates that the seal is not adequate the drilling contractor will be required to per and squeeze the zone prior to continuing operations.
e the zone prior to continuing operations.  +
Name Cement Bond Log  +
OpenEI/PageDescription About Cement Bond Log, a geothermal exploration technique, including areas of use.  +
OpenEI/PageKeyword geothermal  + , exploration  + , techniques  + , Cement Bond Log  + , areas  +
Pitfalls Even expert analysis of a cement-bond logs will not always locate all channels through the cement accurately.  +
References [http://www.epa.gov/esd/cmb/GeophysicsWebsite/pages/reference/methods/Borehole_Geophysical_Methods/Logging_Techniques_and_Tools/Acoustic_Logging.htm EPA-Environmental Geophysics-Geophysical Methods-Acoustic Logging]  +
TypeOf Acoustic Logs +
Has query
"Has query" is a predefined property that represents meta information (in form of a subobject) about individual queries and is provided by Semantic MediaWiki.
Cement Bond Log + , Cement Bond Log + , Cement Bond Log + , Cement Bond Log + , Cement Bond Log + , Cement Bond Log + , Cement Bond Log + , Cement Bond Log + , Cement Bond Log + , Cement Bond Log +
Has processing error
"Has processing error" is a predefined property provided by Semantic MediaWiki and represents errors that appeared in connection with improper value annotations or input processing.
Cement Bond Log + , Cement Bond Log +
Categories Exploration Techniques , Geothermal , Well Log Techniques , Cement Bond Log
Modification date
"Modification date" is a predefined property that corresponds to the date of the last modification of a subject and is provided by Semantic MediaWiki.
20:07:27, 10 October 2013  +
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