Final Report - Geoscience BC
Final Report - Geoscience BC Final Report - Geoscience BC
Wireline DataRPDSSample DataProcess LogForced IntervalGeologicalSamplePhysical/SamplePropertiesRegional PropertiesFigure 4. Schematic diagram of the simplified RPDS data model, leading to the generation of the RegionalProperties summary table.The storage of borehole wireline physical property data in RPDS is based on the concept oflogging runs. Logging run data is stored in the Process Log Table, which contains the calibratedand processed logging run data for each borehole. This data is considered the “live data” inRPDS and is used for calculating the population statistics. Raw data is stored elsewhere in thedatabase for archival purposes only. The Process Log Table stores the physical property valuesfrom various depths as measured along the borehole. Since the depth intervals for eachmeasurement may vary per logging run, it is important to normalize these values to a constantdepth interval in order to correlate each of the parameters for different logging runs. This isperformed in the Forced Interval Table of RPDS.The Forced Interval Table interpolates the Process Log data for each physical property to acommon reference sampling interval of 10cm. Physical properties from the Forced Interval Tablemay be correlated since, as they are interpolated to the same depth, they represent measurementsof the same rock sample.In parallel, a significant amount of available laboratory measurements are stored in the SampleTable. This table accommodates the physical property data and all associated metadata fromlaboratory measurements of both borehole core samples originating from boreholes, and surfacesamples of varying origin.Geological information for borehole wireline, borecore, and surface samples are storedseparately in the database in the Geological Property Table. This table includes information on14
lithology, alteration, formation, geologic age, assay analyses, as well as space for storing corephotos which are rapidly visible on-the-fly. Lithology is stored as the specific lithological unitname using the local nomenclature from the data source. However, in addition to this naming, ageological “Master Lithology Classification” scheme has been developed to provide a moregeneral hierarchical description of the unit. This allows for consistent and more practical dataquerying within the RPDS environment. The geological data is combined with the borehole andsample data to produce the comprehensive Physical/Sample Properties Table.The Physical/Sample Properties Table is a composite table where logging run data taken fromthe Forced Interval Table and sample data taken from the Sample Table are correlated withgeological information. This is also where population statistics of physical properties as afunction of geological classification are pre-stored for rapid query. This table lists, for eachborehole, the mean values, standard deviations, and sample counts for physical properties perunique lithologic interval encountered in the borehole (as described in Section 4.1). At present,population statistics are calculated on the following 16 parameters, although others can be addedto this list: gamma-ray, potassium, uranium, thorium, density, magnetic susceptibility,conductivity, temperature, temperature gradient, IP, resistivity, self potential, self potentialgradient, velocity, neutron porosity, and caliper. This table is further summarized in the RegionalProperties Table.The Regional Properties Table is the final step in the data distillation process where physicalproperty data is summarized and stored by combining mean physical property values from thesame regional area that possess a common geological fingerprint, i.e. the sameformation/lithology/alteration combination. Therefore, the physical properties of all occurrencesof one geological unit in a borehole are averaged and combined with any other occurrences ofthat geological combination in the same area. As mentioned above, this provides one series ofstatistical summary values (mean, min, max, standard deviation, median, number of samples) foreach physical property, for each unique geological combination in the same regional geographicarea. Data for BC represented in the Regional Properties Table is included on the DVD providedwith this report (Appendix 2).15
- Page 3 and 4: … modelling the earth310 Victoria
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- Page 9 and 10: 2. Project DeliverablesDeliverables
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- Page 33 and 34: geophysical data. The geophysical m
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- Page 43 and 44: merge into the background. Deposits
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Wireline DataRPDSSample DataProcess LogForced IntervalGeologicalSamplePhysical/SamplePropertiesRegional PropertiesFigure 4. Schematic diagram of the simplified RPDS data model, leading to the generation of the RegionalProperties summary table.The storage of borehole wireline physical property data in RPDS is based on the concept oflogging runs. Logging run data is stored in the Process Log Table, which contains the calibratedand processed logging run data for each borehole. This data is considered the “live data” inRPDS and is used for calculating the population statistics. Raw data is stored elsewhere in thedatabase for archival purposes only. The Process Log Table stores the physical property valuesfrom various depths as measured along the borehole. Since the depth intervals for eachmeasurement may vary per logging run, it is important to normalize these values to a constantdepth interval in order to correlate each of the parameters for different logging runs. This isperformed in the Forced Interval Table of RPDS.The Forced Interval Table interpolates the Process Log data for each physical property to acommon reference sampling interval of 10cm. Physical properties from the Forced Interval Tablemay be correlated since, as they are interpolated to the same depth, they represent measurementsof the same rock sample.In parallel, a significant amount of available laboratory measurements are stored in the SampleTable. This table accommodates the physical property data and all associated metadata fromlaboratory measurements of both borehole core samples originating from boreholes, and surfacesamples of varying origin.Geological information for borehole wireline, borecore, and surface samples are storedseparately in the database in the Geological Property Table. This table includes information on14
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