Assessing the diagenesis of northern Perth Basin Permian sandstone
reservoirs using HyLogger spectral data
Presented by
Iain Copp; Consultant Geologist
Lena Hancock; Spectral Geologist
TO CHANGE IMAGERight click and select “Change
Picture…”
Sc
op
e =
Us
er S
WIR
TS
A : K
AO
LIN
; 47
48
Po
ints
; Au
x: S
et M
ine
ral
De
pth
(m)
Count
2637
2640
2643
2646
2649
2652
2655
2658
2661
2664
2667
2670
2673
2676
2679
0 50
Dickite
Kaolinite-P
X
Kaolinite-W
X
Sc
op
e 1
:12
18
8; 7
26
7 P
oin
ts, r=
-0.5
51
; Au
x: W
hite
Mic
a w
22
00
De
pth
(m)
sericite w2200
2637
2640
2643
2646
2649
2652
2655
2658
2661
2664
2667
2670
2673
2676
2679
2195 2210
2210
2207
2204
2201
2198
2195
Sc
op
e 1
:12
18
8; 8
68
0 P
oin
ts, r=
0.1
38
; Au
x: Q
ua
rtz d
ep
th
De
pth
(m)
Quartz depth
2637
2640
2643
2646
2649
2652
2655
2658
2661
2664
2667
2670
2673
2676
2679
0.007 0.179
0.1
78
0.1
44
0.1
1
0.0
76
0.0
42
0.0
08
Sc
op
e =
Ma
sk
(Fin
al M
as
k); 1
12
1 P
oin
ts, r=
0.0
85
2; A
ux
: 17
30
nm
de
pth
De
pth
(m)
1730 nm depth
2637
2640
2643
2646
2649
2652
2655
2658
2661
2664
2667
2670
2673
2676
2679
0.0097 0.0429
0.0
42
6
0.0
36
1
0.0
29
6
0.0
23
0.0
16
5
0.0
1
Sc
op
e =
Us
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LS
T : G
yp
su
m; 8
88
Po
ints
; Au
x: S
et M
ine
ral
De
pth
(m)
Count
2637
2640
2643
2646
2649
2652
2655
2658
2661
2664
2667
2670
2673
2676
2679
0 47
Gy
psu
m
Sc
op
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18
8; 2
43
Po
ints
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4; A
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te w
av
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ng
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30
0 n
m
De
pth
(m)
Carbonate Height at 11300 nm
2637
2640
2643
2646
2649
2652
2655
2658
2661
2664
2667
2670
2673
2676
2679
0.0058 0.0265
11
58
0.2
11
49
2.5
11
40
4.7
11317
11
22
9.2
11
14
1.5
Sc
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Us
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LS
T : K
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LD
SP
AR
; 14
0 P
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ts; A
ux
: Se
t Min
era
l
De
pth
(m)
Count
2637
2640
2643
2646
2649
2652
2655
2658
2661
2664
2667
2670
2673
2676
2679
0 20
Microcline
Orthoclase
‘A question of sandstone diagenesis…’
What drives porosity and permeability development?
Complex interplay between…
Detrital grain composition, texture, facies, climate, sea-level change, fluid chemistry, temperature, burial depth, mechanical and chemical compaction, uplift history, hydrocarbon emplacement, diagenetic clays and cements…
Northern Perth Basin sandstone reservoirs
NPB Permian reservoirs Dongara–Wagina Sandstones
(e.g. Senecio, Yardarino, Dongara, Mondarra, Beharra Springs, Hovea fields)
High Cliff and ‘Kingia’ Sandstones (Waitsia field)
Facies
Authigenic clays & cements
Depth of burial
ØPrimary porosity controls
Senecio 3
Waitsia 1
Waitsia 1
Senecio 3
Sedimentological and spectral analysis
Sedimentological logging Trace fossil logging (MGPalaeo) Existing petrography (Weatherford Laboratories)
and core plug poro–perm data Additional petrography and XRD Petrophysics* Spectral analysis using HyLogger
Senecio 3
Waitsia 1
Dongara Sst
Wagina Sst
Kockatea Sh
Carynginia Fm
IRCM
Holmwood Sh
‘Kingia sst’
High Cliff Sst
‘Bit basher sh’
Co
reC
ore
HyLogger 3.0 spectral scanner
Rapid (1 metre/30 sec) spectral analysis and imaging system for scanning of drillcore
Produces reflectance spectra in the visible (380–1000 nm), shortwave-infrared (SWIR; 1000–2500 nm), and thermal infrared (TIR; 6000–14 000 nm) parts of the electromagnetic spectrum
Radiowaves
Micro-waves
Infrared Ultra-violet
X-Rays Gammarays
Visible light
107 105 103 10 10-1 wavelength, nm
HyLogger range
DMIRS HyLogger
Approx. 254 000 m scanned to date; approx. 10% petroleum core
Senecio 3 Dongara–Wagina Sandstones
HyLogger – sedimentology – poro–perm relationships
1. Identified hydrocarbons, coincident with:o Core fluorescence zoneo Mod–coarse grainsize, mod–poor sortingo MSF, USF and DC → Skolithos ichnofacieso V. low % late-stage siderite cemento Predominantly dickite–illite zone
Hydrocarbons
Late-stage siderite
MSF, USF & DC faciesSkolithos IF
Dickite (polytypeof kaolinite) & illite
MSF, USF & DC faciesSkolithos IF
FaciesGrainsize, lithology, sortingSWIR
Illite
Dickite
HCSiderite
(vis.)
Quartz & dickite
SEM image
TIRQuartz ‘depth’ Illite Poro-perm Core GR Ichnology
Illite
Dickite
2. Identified sharp change in diagenetic clays from illite → dickite–illite, coincident with:• LSF → MSF, USF & DC facies• Cruziana to Skolithos ichnofacies
3. Identified sharp change from relatively Al-rich illite to Al-poor, coincident with:• Illite → dickite–illite
Dickite–illite change
Al-rich illite
Al-poor illite
MSF, USF & DC faciesSkolithos IF
LSF faciesCruziana IF
FaciesGrainsize, lithology, sortingSWIRHCSiderite
(vis.) TIRQuartz ‘depth’ Illite Poro-perm Core GR Ichnology
Illite
Dickite
Quartz & dickite
Quartz spectral absorption ‘depth’
Quartz ‘depth’ & grainsize Ø
Late-stage siderite (vis.)
4. Identified changes in relative abundance of quartz overgrowth cements (QOC)
Quartz grain
Quartz grain
Quartz grain
Quartz grain
Quartz ‘depth’ = Q grains + QOC
FaciesGrainsize, lithology, sortingSWIRHCSiderite
(vis.) TIRQuartz ‘depth’ Illite Poro-perm Core GR Ichnology
K
TQ=92%
Good grainsize proxy
Illite
Dickite
Quartz & dickite
Quartz ‘depth’ & grainsize Ø
Late-stage siderite (vis.)
FaciesGrainsize, lithology, sortingSWIRHCSiderite
(vis.) TIRQuartz ‘depth’ Illite Poro-perm Core GR Ichnology
K
17%/82%
14%/78%
18%/91%
14%/82%
Relatively ‘overcemented zones’
Fine sst: ?upwards increase in QOCVisually very cemented
Fine sst: ?higher QOC
Coarse sst: ?higher QOC
Stylolitized zone (localized quartz
cementation)
Illite
Dickite
Quartz & dickite
Quartz ‘depth’ & grainsize Ø
Late-stage siderite (vis.)
FaciesGrainsize, lithology, sortingSWIRHCSiderite
(vis.) TIRQuartz ‘depth’ Illite Poro-perm Core GR Ichnology
K
Highest permeability zonePrimary• MSF, USF, DC facies• Low to absent siderite
cement• Dickite & illiteSecondaryInterplay between:• Grainsize (coarse better)• Bioturbation (less better)• ?QOC (equivocal)
Highest porosity zonePrimary• DC & ?SF facies• Low to absent siderite• Lack of stylolites
Cuttings vs core: proof-of-concept
The next question(s)…
Going up a scale, how representative diagenetically is Senecio 3 compared with the rest of the field and also across the Dandaragan Trough?
How does diagenetic variability compare with porosity & permeability?
1. Mostly cuttings available, little core
2. How reliable are HyLogged cuttings in reproducing the spectral response in Senecio 3 core?
3. How do we best HyLogg cuttings?
Senecio 3 cuttings (& cored interval)
Co
re
Kockatea Shale
Caryginia Fm
Wag
ina
San
dst
on
eD
on
gara
Sa
nd
sto
ne
Co
re
HyLogger cuttings scan (5m composites)
HyLogger core scan
Senecio 3 cuttings vs core
Quartz
Quartz
Illite
Illite
Dickite
Dickite
Kaolinite
Ti-oxides
TIR SWIR
TIR SWIR
Aspectral
Irwin 1 (3147m)
Irw
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Dep
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Bin % Rel. Weight
31
60
32
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32
40
32
80
33
20
33
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34
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32
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33
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19
70
19
80
19
90
20
00
20
10
20
20
20
30
20
40
0 30 60 90
Min
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Asp
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Gyp
su
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Calc
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An
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Bin % Rel. Weight
19
70
19
80
19
90
20
00
20
10
20
20
20
30
20
40
0 30 60 90
Min
era
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He
matite
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Gyp
su
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Calc
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Sid
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Sm
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Para
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Mu
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th
(m
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Bin % Rel. Weight
27
30
27
60
27
90
28
20
28
50
28
80
29
10
0 30 60 90
Min
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Aspectral
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27
30
27
60
27
90
28
20
28
50
28
80
29
10
0 30 60 90
Min
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Micro
clin
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Ph
en
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Ca
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Orth
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Mu
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Ru
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Qu
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Do
ma
in
Waitsia 1 (2746m)
Caryginia Fm
Dickite, illite
Av. log Ø: 7.4%
K (core): <0.1mD
Hovea 3 (1992m)
Dickite
Core
Senecio 3 (2632m)
Av. log Ø: 13.5%
K (core): 0.8 – 2.6mD
Illite
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Bin % Rel. Weight
25
20
25
40
25
60
25
80
26
00
26
20
0 30 60 90
Min
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Ph
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Pa
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An
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Ka
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Sid
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25
20
25
40
25
60
25
80
26
00
26
20
0 30 60 90
Min
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Calc
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Alb
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Mic
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Montm
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Kaolin
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Quartz
Do
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in
Hakia 2 (2518m)
Dickite
Av. log Ø: 15.5%
Centella 1 (2954m)
Kaolinite (dickite), illite
Av. log Ø: 9.6%
K (core): 1 – 4.6mD
Increasing depth, west to east approx. 12km
Av. log Ø: <9%Av. log Ø: 15.6%
K (core): 123–2078mD
Core
Dongara &
Wagina Sst
Multimin
Petrography (Hovea 3, Senecio 3, Centella 1 & Irwin 1)
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10
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20
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30
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90
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10
20
20
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Min
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20
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30
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Bin % Rel. Weight
31
60
32
00
32
40
32
80
33
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33
60
34
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ICA
Do
ma
in
Ce
nte
lla
1: S
pa
tia
l S
um
ma
ry (
Bin
=1
Min
Bin
=5
%u
TS
A+
7.0
5, M
in
era
l S
ub
se
t)
Dep
th
(m
)
Bin % Rel. Weight
29
60
29
80
30
00
30
20
30
40
0 30 60 90
Gro
up
CH
LO
RIT
E
INV
AL
ID
WH
ITE
-M
ICA
KA
OL
IN
Do
ma
in
Ce
nte
lla
1_
ts
g_
tir: S
pa
tia
l S
um
ma
ry (
Bin
=1
Min
Bin
=5
%u
jC
LS
T 7
.07
, Min
era
l S
ub
se
t)
Dep
th
(m
)
Bin % Rel. Weight
29
60
29
80
30
00
30
20
30
40
0 30 60 90
Gro
up
SM
EC
TIT
E
WH
ITE-M
ICA
K-FELD
SPA
R
KA
OLIN
SIL
ICA
Do
ma
in
GRTIR SWIR
GRTIR SWIR Kockatea Shale
Illite
GRTIR SWIR
GRTIR SWIR GRTIR SWIR
GRTIR SWIRTIR SWIR
Quartz
Illite
Dickite
Calcite
Kaolinite
Se
ne
cio
Fa
ult
Mounta
in B
ridge F
ault
Kaolinite
>> illite
Calcite
Illite
Provisional interpretations
Shallow–deep, north–south, west–east:
1. Dickite e.g. (Hakia 2) → dickite–illite / illite (e.g. Senecio 3, Irwin 1)
2. Decrease in porosity and permeability: av. log Ø: 16 → 7%, core K: 2078 → 0.1mD
3. Quartz overgrowth cements similar (3 wells; 400m depth difference): 13–16%
Dickite vs illite probably influencing porosity, and particularly permeability
Distribution and proportions of diagenetic clays and cements suggests a combination of shallow and deep diagenetic processes
Dickite
Fibrous illite
Quartz
overgrowth
cement (QOC)
Conclusions
Applications
Well-scaleHigh-resolution stratigraphic/compositional changes in lithology, clays and cements; diagenetic baffles; O/GWC
Field- and regional-scaleLateral variability of facies lithologies and diagenesis; localized diagenetic affects from faults and nearby mudrock units (i.e. silicification, illitization); helps identify significant stratal surfaces (SB, TS, mfs, PB)
Basin-scale…
Basin-scale application: Understanding fluid evolution, fluid flow and diagenesis in sedimentary basins
Collecting HyLogger datasets over entire well intervals (Recent–Palaeozoic) Providing regional profiles of authigenic clays and cements (‘diagenetic profiles’) 3D lithostratigraphic – diagenetic models
Diagenetic profiles record (combined) temporal changes in fluid chemistries related to:
Changes in sediment composition: changes in provenance and depositional environments Changing climate: humid vs arid/semi-arid (greenhouse–icehouse) Changing sea-level : deep and shallow marine, continental (SB, mfs, TS) Tectonism: meteoric influx, dolomitization, hydrothermal fluid expulsion, intrusions Burial histories: rates of burial and uplift, relative temperature changes
Conceptually, when combined with other data (e.g. burial history, isotopes, fluid inclusions, petrography, XRD, formation water chemistry), HyLogger data may help explain regional fluid-evolution, -flow and -stratification, as well as identifying vectors towards enhanced porosity and migration pathways for petroleum and mineralization
Yardarino2: Spatial Summary (Bin=150 MinBin=5%uTSA+ 7.05, Mineral Subset)
Index
Bin % Rel. Weight
03000
60009000
1200015000
1800021000
0 30 60 90
Mineral
Siderite
Kaolinite-PX
MuscoviticIllite
Phengite
Gypsum
Muscovite
Aspectral
Kaolinite-WX
Dickite
Domain
Yardarino2_tsg_tir: Spatial Summary (Bin=150 MinBin=5%Un-edited sjCLST 7.07, Mineral Subset)
Index
Bin % Rel. Weight
03000
60009000
1200015000
1800021000
0 30 60 90
Group
SMECTITE
PHOSPHATE
OTHER-MGOH
CARBONATE
K-FELDSPAR
WHITE-MICA
SULPHATE
PLAGIOCLA...
KAOLIN
SILICA
Domain
COBURN1: Spatial Summary (Bin=5 MinBin=5% uTSAS 7.0, Mineral Subset)
Depth (m)
Bin % Rel. Weight
200400
600800
1000
0 30 60 90
Mineral
Aspectral
PhengiticIllite
Gypsum
Dolomite
Calcite
Siderite
Ankerite
Chlorite-Mg
Montmorillonite
Phengite
Muscovite
Kaolinite-WX
Kaolinite-PX
COBURN1_tsg_tir: Spatial Summary (Bin=5 MinBin=5% uTSAT 7.0, Mineral Subset)
Depth (m)
Bin % Rel. Weight
200400
600800
1000
0 30 60 90
Mineral
Aspectral
Hematite
Gypsum
Magnesite
Dolomite
Calcite
Siderite
Chlorite
Montmorillonite
Muscovite
IlliteKaolinite-PX
Kaolinite
Bytownite
Albite
Orthoclase
Microcline
Quartz
Use with understandingUse at your own risk
COBURN
1: Spati
al Summ
ary (Bi
n=5 Mi
nBin=5
% uTSA
S 7.0, M
ineral S
ubset)
Depth (m
)
Bin % Rel. Weight
200400
600800
1000
0306090
Mineral
Aspectr
al
Phengiti
cIllite
Gypsum
Dolomite
Calcite
Siderite
Ankerite
Chlorite-
Mg
Montmor
illonite
Phengite
Muscov
ite
Kaolinite
-WX
Kaolinite
-PX
COBURN
1_tsg_ti
r: Spati
al Summ
ary (Bi
n=5 Mi
nBin=5
% uTSA
T 7.0, M
ineral S
ubset)
Depth (m
)
Bin % Rel. Weight
200400
600800
1000
0306090
Mineral
Aspectr
al
Hematite
Gypsum
Magnes
ite
Dolomite
Calcite
Siderite
Chlorite
Montmor
illonite
Muscov
ite
Illite Kaolinite
-PX
Kaolinite
Bytowni
te
Albite
Orthocla
se
Microclin
e
Quartz
Use with
underst
anding
Use at y
our own
risk
HyLogged cuttings