Authors / CoAuthors
Cathro, D.L. | Fomin, T. | Peljo, M.
Abstract
Geoscience Australia commissioned reprocessing of selected legacy 2D seismic data in the East Kimberley, onshore Bonaparte Basin as part of the Exploring for the Future (EFTF) program. Reprocessing of these data occurred between September 2017 and May 2018. Exploring for the Future (<a href="https://www.ga.gov.au/eftf/">https://www.ga.gov.au/eftf</a>) was a $100.5 million four-year (2016-20), Australian Government-funded program to provide a holistic picture of the potential mineral, energy and groundwater resources in northern Australia. The program has delivered new geoscience data, knowledge and decision support tools to support increased industry investment and sustainable economic development across the north. Groundwater is a critical resource that accounts for most water used across northern Australia. The groundwater component of the EFTF program focused on addressing groundwater resource knowledge gaps, to support future opportunities for economic development via irrigated agriculture, extractive industries and increased security of community water supplies. Through collaboration with State and Territory partners, the program undertook targeted regional investigations of groundwater systems and assessments of groundwater potential more broadly across the region. The program's activities, implemented by Geoscience Australia, involved application of innovative geoscience tools to collect, integrate and analyse a range of data. It includes geological and hydrogeological data, airborne and ground-based geophysical and hydrogeochemical surveys, remote sensing data as well as stratigraphic drilling. The new data and better understanding of groundwater systems also helps inform decision making about groundwater use to protect environmental and cultural assets. These outcomes strengthen investor confidence in resources and agricultural projects by de-risking groundwater in northern Australia. The package contains reprocessed data from ten surveys acquired between 1980 and 1997. In total 53 lines were reprocessed covering a fold area of approximately 618.9 line kilometres, with the objective to produce a modern industry standard 2D land seismic reflection dataset where possible from a selection of multiple legacy 2D data. The purpose of the reprocessing was twofold: 1) To image the near surface structural and stratigraphic configuration for linking to AEM data that is available in the Bonaparte Basin; and 2) To image the structure and stratigraphic architecture of the Paleozoic Bonaparte Basin. The dataset exhibits significant improvements in stack response in most of the reprocessed lines when final and legacy stacks were compared, especially in the shallow section. Optimum results were obtained from the noise attenuation workflows. A minimum processing flow was applied to BWA80, BWA81, and line BNT87-404 lines to avoid any signal leakage throughout the processing. Final data were delivered as minimum phase (care should be taken not to interpret zero crossings as geological boundaries), and final velocities produced a good match with the well checkshot velocities. The processing report from Down Under Geophysics is available for download with this release. Raw and processed data are available on request from <a href="mailto:clientservices@ga.gov.au&body=Ref: eCat 135578">clientservices@ga.gov.au</a> - Quote eCat# 135578. Processed stack SEG-Y files and ancillary data are available for download from this web page.
Product Type
dataset
eCat Id
135578
Contact for the resource
Point of contact
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Point of contact
Resource provider
Keywords
- theme.ANZRC Fields of Research.rdf
-
- GEOLOGYGEOPHYSICSEARTH SCIENCES
-
- 2D Shallow Reflection Seismic
- ( Project )
-
- Exploring For The Future
- ( Project )
-
- EFTF
-
- Onshore Bonaparte Basin
-
- Groundwater
-
- Published_External
Publication Date
Creation Date
Security Constraints
Legal Constraints
Status
completed
Purpose
The processing sequences were designed to target very shallow data (0-1 sec), and to image to the end of record (0-4 sec) while maintaining data quality.
Maintenance Information
notPlanned
Topic Category
geoscientificInformation
Series Information
Lineage
<h6>Data Selection</h6> Legacy datasets in the onshore Bonaparte Basin were selected for reprocessing based on review of seismic lines in a “Kingdom” project provided by Advent Energy Ltd. <h6>Data Provision</h6> Western Australian field seismic data and remaining ancillary data were provided by the Department of Mines and Petroleum (WA) via KDM Spectrum Data, and Northern Territory data were provided by the Northern Territory Geological Survey via CGG Services Australia Pty Ltd. Selected surveys included BWA-80, BWA-81, BWA-87 Cockatoo, BWA-88 Haleys, AWC96 Waggon Creek, SH84 (Spirit Hills), BNT-87 (Weaber), BNT-88 (Forsyth), WP-96 (Weaber Plains), and AS-97 (Spike). These were provided in SEGY format to DownUnder GeoSolutions Pty Ltd (DUG). <h6>Data Processing</h6> DUG assessed the surveys for data quality and ran common routines to image the subsurface geology, including: <ul> <p>* Pre-Stack Time Migration</p> <p>* Pre-Stack Depth Migration</p> <p>* Post-Stack Migration, and</p> <p>* Depth Conversion.</p> </ul> Processing details are documented in DUG's report (DUGRef: IgcBonPr_013) "Geoscience Australia: 2017 Bonaparte Basin, Australia, 2D Land Seismic Survey Reprocessing - Processing Report," contained within this dataset. <h6>Data Quality</h6> QC services were provided throughout the project by Nick Fitzgerald from AusGEOS, including the processing sequence and final report.
Parent Information
Extents
[-15.80, -14.80, 128.40, 129.60]
Reference System
Spatial Resolution
Service Information
Associations
Downloads and Links
Source Information