HUN Deep Wells Biomarkers v01

Abstract

The dataset was derived by the Bioregional Assessment Programme from a well completion reports dataset. The source dataset is identified in the Lineage field in this metadata statement. The processes undertaken to produce this derived dataset are described in the History field in this metadata statement.

The dataset consists of shapefiles indicating the location and depth of well markers used to build the geological model for the Hunter subregion. The well markers show significant biological features in the rock formation that represent key indicators to the nature of the formation. Biomarkers are a group of compounds, primarily hydrocarbons, found in oils, rock extracts, recent sediment extracts, and soil extracts. When samples of oil and candidate source rocks are available, biomarkers can be used to make oil-source rock correlations which aid geologists in determining the age, history of and stratigraphy of the formations from drill logs and samples taken from various depths during the exploration phase.

Purpose

For display on HUN 2.12 geological figures (at the time of this metadata creation figures 002, 004 and 006)

Dataset History

Location data for the well sites and the biomarklers identified in this dataset has been sourced from well completion reports. The dataset has been exported from RMS geological modelling software as a .dat files. These have been converted to a shapefiles for the various wells and depths using ArcGIS.

The naming convention refers to the geological age and depth (TVD ss = total vertical depth subsea reported to the Australian Height Datum) of the various formations as follows:

Regional horizon name Age (geological stage) Newcastle Coalfield Hunter Coalfield Western Coalfield Central or Southern coalfields

M600 Top Anisian Top Hawkesbury Sandstone Top Hawkesbury Sandstone Top Hawkesbury Sandstone Base Wianamatta Group

M700 Top Olenekian Base Hawkesbury Sandstone Base Hawkesbury Sandstone Base Hawkesbury Sandstone Base Hawkesbury Sandstone

P000 Top Changhsingian Base Narrabeen Group Base Narrabeen Group Base Narrabeen Group Base Narrabeen Group

P100 Upper Wuchiapingian Base Newcastle Coal Measures Base Newcastle Coal Measures Top Watts Sandstone Top Bargo Claystone

P500 Mid Capitanian Base Tomago Coal Measures Base Wittingham Coal Measures Base Illawarra Coal Measures Base Illawarra Coal Measures

P550 Top Wordian Base Mulbring Siltstone Base Mulbring Siltstone Base Berry Siltstone Base Berry Siltstone

P600 Mid Roadian Base Maitland Group Base Maitland Group Base Shoalhaven Group Base Shoalhaven Group

P700 Upper Kungurian Top Base Greta Coal Measures Top Base Greta Coal Measures

P900 Base Serpukhovian Base Seaham Formation Base Seaham Formation

with 'M' referring to Mesozoic and 'P' to Paleozoic

Dataset Citation

Bioregional Assessment Programme (2015) HUN Deep Wells Biomarkers v01. Bioregional Assessment Derived Dataset. Viewed 22 June 2018, http://data.bioregionalassessments.gov.au/dataset/24dc9764-79bc-4887-9b47-0f1206f9b8da.

Dataset Ancestors

• Derived From Hunter deep well completion reports