www.dmp.wa.gov.au
SOUTH WEST HUBCO SEQUESTRATION2
Petroleum Division
Government of Western AustraliaDepartment of Mines and Petroleum
Investigating CO storage in Western Australia2
Future work will acquire more pre-competitive data and may include:
As the Lead Agency for Greenhouse Gas (GHG) storage in Western Australia, the Department of Mines and Petroleum (DMP) has three main roles:
To regulate the development of GHG storage (Carbon dioxide)To provide pre-competitive dataTo provide assurance to the public that the operations are safe and that the GHG is removed from the atmosphere and safely stored undergroundfor 1000 years.
Large power plants are located in the South West at Kwinana and in the Collie area with combined annual CO emissions in the order of 27 million tonnes 2
per year (Mtpa). Government and industry are collaborating to investigate the potential of the geosequestration of CO in the deep saline formation of the 2
Lesueur Sandstone in the southern Perth Basin. The objective of the South West Hub project is to store up to 6.5 Mtpa of CO over an injection period of forty 2
years. Two desk top studies analysed all the available data to locate an area in the Harvey and Waroona Shires that offers the greatest storage potential.
A 2D seismic study was conducted in March 2011 and the 2945-m deep Harvey 1 stratigraphic well was drilled in February and March 2012. This stratigraphic well obtained technical data and samples that reduce the uncertainty of storage capacity.
Drilling data wells and conducting a trial injection
Acquisition of 3D seismic data which will give more information on the subsurface including fault distribution in the area
Drilling a slimhole well to 1000 m depth to further determine the thickness of the shale in the Eneabba Formation and the salinity of the Eneabba Formation and Yalgorup Member
AUGUST 2013
Indeed, a major GHG storage project such as the South West Hub moves from uncertainty to certainty in a series of staged evaluations that provides improved knowledge of the subsurface. These activities will assist DMP to assume its role as regulator once the project is operational.
Shale - spikes
Base - Wonnerup 2900 m
Top - Wonnerup 1380 m
Updated Top Myalup - N
Updated Eneabba Shale - N
Unconformity 300 m
Clean Sand - Thickness 1520 m
Harvey 1
Myalup 1 - N
Myalup 2 - N
Myalup 3 - N
Top Wonnerup - N
Unconformity - N
2D SEISMIC LINE 11GA_LL2
RESERVOIR CHARACTERIZATION
HARVEY 1 WELL LOG
Overview of logged section, 841-2878 m, including core intervals.
Hole shape:Blue curve = BitRed curve = Average Caliper
Borehole size 8.5 inch.Enlarged borehole in top section (841-1370 m).
GR: scale 0-250
Core intervals, shiftet depths:Core 1 = 892.25 - 928.75 mCore 2 = 1263.5 - 1314.5 mCore 3 = 1317.4 - 1332.4 mCore 4 = 1333.0 - 1341.0 mCore 5 = 1896.4 - 1948.1 mCore 6 = 2479.0 - 2531.0 m
Area of interest
Top Yalgorup
Top Wonnerup
Base Wonnerup
Hole shape DepthMD
DENS–BlueNEUT–Red
900
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500
2600
2700
2800
MAX DEPTH Azimuth No. ofMAX DIP
80
90
121
112
111
141
126
133
1123
143
98
121
111
112
56
Avg = Average KKpor = K from porosity
KWYR = K from Wyllie-RoseKpor = K from Dumanoir-Coates
MD
2480
2490
2500
2510
(m)
MD
2480
2490
2500
2510
2520
(m)
WELL CORRELATION
One of the more significant observations interpreted from Harvey 1 logs and core data is that an interval in the Wonnerup Member of the Lesueur Sandstone showed poor to good ranges in permeability, which reduces CO injection constraints for the 2
planned storage. A preliminary dynamic model, prepared by DMP and Schlumberger Greenhouse Gas Solutions, shows that the CO plume does not 2
reach the main faults in any of the scenarios in 1000 years.
Line 2 of the seismic survey located along Riverdale Road showing the interpreted stratigraphy and position of GSWA Harvey 1
STYLIZED REPRESENTATIONOF THE PROJECT
Schematic showing conceptual geology of the SW Hub study area
Core from the basal section of the upper Lesueur Sandstone
Horizon maps of the Yalgorup and Wonnerup members and proposed area of injection
Maximum dip within all sets of cross-bedding thicker than 20 cm are displayed
Location map of the southern Perth Basin showing the SW Hub sequestration area. Line A-B is represented in the well correlation figure. The insert box refers to the fault distribution map of the Harvey region
Reservoir characterization – logs showing expected porosity and permeability of the CO reservoir2
6334900 m
6339900 m
6344900 m
6349900 m
6354900 m
6355900 m
380500 mE 385500 mE 390500 mE 395500 mE
11GA_LL1
11GA_LL2
11G
A_L
L4
11G
A_L
L46
11G
A_L
L5
11GA_LL3
FAULT DISTRIBUTION – HARVEY REGION
11GA_LL1
11G
A_L
L4
11G
A_L
L46
11G
A_L
L5
11GA_LL3
11GA_LL2
SEE WELL CORRELATION ANDFAULT DISTRIBUTION DIAGRAM
30 km
WONNERUP 1 HARVEY 1 LAKE PRESTON 1 PINJARRA 1 ROCKINGHAM 1 COCKBURN 1
A B
B
A
Cockburn 1
Rockingham 1
Pinjarra 1
Lake Preston 1 Harvey 1
Wonnerup 1
