Authors / CoAuthors
Roach, I. | Schofield, A.
Abstract
Drilling in the Geoscience Australia Exploring for the Future East Tennant project was conducted as part of the MinEx CRC National Drilling Initiative. Ten stratigraphic boreholes were drilled for scientific purposes in the region around the Barkly Roadhouse in the Northern Territory. Where possible, the boreholes were comprehensively wireline logged to obtain petrophysical data on the cover and basement rocks to help improve knowledge and geophysical models of the region. Formation density data obtained by wireline logging were validated using laboratory-based bulk density data obtained by Archimedes method on diamond drill core samples at Geoscience Australia. Results of the validation show that wireline-logged formation density data and Archimedes wet bulk density data are in good general agreement in the first five boreholes drilled (NDIBK01, NDIBK02, NDIBK03, NDIBK04 and NDIBK05). Difficult drilling and some lost drilling equipment meant that boreholes NDIBK06, NDIBK07 and NDIBK09 could not be cased properly, or could not be re-entered, and thus formation density wireline logs could not be obtained in these holes. Boreholes NDIBK08 and NDIBK10 were wireline logged, however formation density results from these last two holes were problematic. Wireline formation density results for borehole NDIBK08 are shown to be too high due to miscalibration of the wireline formation density tool, and results from borehole NDIBK10 cannot be robustly assessed because of a lack of sufficient Archimedes bulk density data needed to provide statistical relevance and validate the wireline formation density data.
Product Type
document
eCat Id
146264
Contact for the resource
Point of contact
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
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- Contact instructions
- MEG
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Digital Object Identifier
Keywords
- theme.ANZRC Fields of Research.rdf
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- GEOLOGYEARTH SCIENCESGEOPHYSICS
- ( Theme )
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- Petrophysics
- ( Discipline )
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- Drilling
- ( Theme )
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- Rock density
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- Published_External
Publication Date
2022-07-13T00:03:53
Creation Date
2022-01-31T15:07:00
Security Constraints
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Status
completed
Purpose
Scientific data validation
Maintenance Information
asNeeded
Topic Category
geoscientificInformation
Series Information
Record RECORD: 2022/025
Lineage
The dataset was generated by a contract wireline logging service provider as part of the EFTF/MinEx CRC East Tennant National Drilling Initiative project. The data underwent quality assurance at Geoscience Australia and, where independent data showed that data quality issues occurred, data were corrected using the independent data. Where data could not be assessed for quality, they were published as-is.
Parent Information
Extents
[-20.50, -19.00, 134.50, 136.50]
Reference System
Spatial Resolution
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Source Information