Acid Gas Injection at Deep Panuke - · PDF fileAcid Gas Injection at Deep Panuke Nova Scotia Energy and Research Development Forum | St. Francis Xavier University, Antigonish, Nova

Acid Gas Injection at Deep Panuke
Nova Scotia Energy and Research Development Forum | St. Francis Xavier University, Antigonish, Nova Scotia | May 21 and 22, 2008
Terrance Skrypnek, Group Lead, Deep Panuke Sub-Surface

EnCana Corporationwww.encana.com
Acid Gas Injection at Deep Panuke
SubseaInstall individual well tieback flow lines , umbilicals, control systems, protection structuresFlowlines and umbilicals to be trenched and buried
Export PipelineInstall export pipeline to shoreOnshore 3 km line and tie-in to existing M&NP pipeline connecting to USA and Canadian marketsLine trenched and buried approx. 50% of length.
Drilling and CompletionsRe-complete existing production wells, drill and complete Acid Gas Injection wellInstall subsea production trees
Production Field CentreSelf-installing, 4-leg facility capable of producing 300 MMcf/dFacility constructed, installed and operated by SBM under long term lease and operating contracts.

Potential Disposal Zones and Criteria
Modified from C-NSOPB, 1997
Sand
Shale
Carbonates
Salt
Sand / Shales
Dolomite
Possible Disposal Zone
"O" Marker
Naskapi Member
Petrel Member
Wyandot Member
Logan Canyon
Lower Missisauga
Aben
aki F
m .
Baccaro Mbr.
Scatarie Mbr.
Mohican Iroquois
Eurydice Argo Verrill Canyon
Misaine Member
Dawson Canyon
NonmarineMarine Clastics
Post-RiftClastics
Carbonates
Syn-Rift
Deep MarineSediments
Terti
ary
Paleo
gene
Neog
ene Pliocene
Miocene
Oligocene
Eocene
Paleocene
MaastrichtianCampanianSantonian
Cret
aceo
us ConiacianTuronianCenomanianAlbianAptianBarremianHauterivianValanginianBerriasianTithonianKimmeridgian
L
E
L
Jura
ssic
E
M
OxfordianCallovianBathonianBajocianAalenianToarcianPliensbachianSinemurianHettangian
Norian
CarnianLadinianAnisianScythian
ME
L
Trias
sic
AgeQ
NW Lithology SE
Laurentian
Upper Missisauga
Meguma Metasediments
Banquereau
Mic Mac
Passive Margin
Clastics, HaliteDolomite
GlacialSediments
Passive Margin
Modified from C-NSOPB, 1997
Sand
Shale
Carbonates
Salt
Sand / Shales
Dolomite
Possible Disposal ZoneModified from C-NSOPB, 1997
Sand
Shale
Carbonates
Salt
Sand / Shales
Dolomite
Sand
Shale
Carbonates
Salt
Sand / Shales
Dolomite
"O" Marker
Naskapi Member
Petrel Member
Wyandot Member
Logan Canyon
Lower Missisauga
Aben
aki F
m .
Baccaro Mbr.
Scatarie Mbr.
Mohican Iroquois
Misaine Member
Dawson Canyon
Post-RiftClastics
Carbonates
Syn-Rift
Terti
ary
Paleo
gene
Neog
ene Pliocene
Miocene
Oligocene
Eocene
Paleocene
Cret
aceo
L
E
L
Jura
ssic
E
M
Norian
ME
L
Trias
sic
AgeQ
NW Lithology SE
Laurentian
Upper Missisauga
Banquereau
Mic Mac
Passive Margin
GlacialSediments
Passive Margin
"O" Marker
Naskapi Member
Petrel Member
Wyandot Member
Logan Canyon
Lower Missisauga
Aben
aki F
m .
Baccaro Mbr.
Scatarie Mbr.
Mohican Iroquois
Misaine Member
Dawson Canyon
Post-RiftClastics
Carbonates
Syn-Rift
Terti
ary
Paleo
gene
Neog
ene Pliocene
Miocene
Oligocene
Eocene
Paleocene
Cret
aceo
L
E
L
Jura
ssic
E
M
Norian
ME
L
Trias
sic
AgeQ
NW Lithology SE
Laurentian
Upper Missisauga
Banquereau
Mic Mac
Passive Margin
GlacialSediments
Passive Margin
Generalized Stratigraphy, Offshore Nova Scotia, showing possible disposal zones
Potential Disposal ZonesAbenaki Middle / Lower MississaugaTidal Fluvial Sandstones (TFSS) Upper Missisauga FormationPanuke P Sands Upper Missisauga FormationCohasset and Lower Logan CanyonDawson Canyon and Upper Logan Canyon
Key CriteriaReservoir Presence and QualityTop Seal (Integrity)ConservationImpact on Future Drilling Plans

Schematic Upper Missisauga Stratigraphy(after Don Cummings, 2004)
Numerous Internal Topseals
InjectionZone
Excellent Lateral Continuity
Naskkapi Shale Topseal

Acid Gas Disposal Schematic
PPT guide rule Try to keep with six lines, six words per lineBefore During After
TD
temporarytrapped gas
12
34
sandgrain
undersaturatedwater
FloodFront
residualgas trapped incentre of pore
Injection Residual Gas Saturation Dissolution / Diffusionsandgrain
Dissolvinggas bubbles
water
Buo
yanc
y Diffusetrailingedge
shale barrier Flood Frontleading edge
gas saturated water
Drawing Not to Scale
D-70
SeafloorWellhead
Pipeline
Tidal-FluvialSandstones
PanukeSandstones and
Shales
Naskapi Fm. Shale
Upp
er M
issi
saug
a Fm
Seawater
1 2 3 4
PFC

Static and Dynamic Earth ModelsStatic Model: 5.4 Million cell geo-cellular model from Naskapi to Lower Missisauga. Constructed to the west of structural saddle which separates the Panuke and Cohasset Oil Pools
Dynamic Model:1/2 of the static model area covered. Used compositional simulation to handle acid gas complexities.
Many cases were run to address uncertainty and for sensitivity analysis
Different injection well locations. Different completion zones. Mean and P10 acid gas forecasts.
CO2 solubility Variability in reservoir absolute and
relative permeability

Background Grid 500mX500M
1.2 km
D-70
N
Line 110
Line 104
Panuke Remaining Recoverable Oil Located ~ 4.5 km SE of D70
100 Year Acid Gas Migration ~ 1.2 km
Deep Panuke 100 Year Acid Gas Migration Plan View

NESW
PERFS
LINE 110
P2 Sand Interval
Base P4 Sand
Top TFSS
D-70
Deep Panuke 100 Year Acid Gas Migration Cross Section: Line 110

NESW
P2 Sand Interval
Base P4 Sand
LINE 104
Top TFSS
Deep Panuke 100 Year Acid Gas Migration Cross Section: Line 104

www.encana.com
Thank You!
Acid Gas Injection at Deep PanukeAcid Gas Injection at Deep PanukePotential Disposal Zones and CriteriaSchematic Upper Missisauga Stratigraphy (after Don Cummings, 2004)Acid Gas Disposal SchematicStatic and Dynamic Earth ModelsSlide Number 7Slide Number 8Slide Number 9Slide Number 10

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Acid Gas Injection at Deep Panuke - · PDF fileAcid Gas Injection at Deep Panuke Nova Scotia Energy and Research Development Forum | St. Francis Xavier University, Antigonish, Nova