PACIFIC OPERATORS OFFSHORE, INC.
CARPINTERIA
FIELD
CARPINTERIA FIELD
OFFSHORE CALIFORNIA
RINCON TREND
STRUCTURE CONTOURS
Platform Hogan
Platform Houchin
(Reprinted in Sylvester and Brown, 1997, Coast Geological Society)
CARPINTERIA OFFSHORE FIELD
Cal. PRC 7911
HOPE
HEIDI
HOUCHIN
HENRY
OCS-P 0240
HOGAN
AREA OF INITIAL
REDEVELOPMENT
OCS-P 0166
Cal. PRC 3133
3-D MODEL OF CARPINTERIA FIELD
VIEW LOOKS NORTHEAST
3-D MODEL SHOWING HOBSON FAULT
VIEW LOOKS SOUTHEAST
LONGITUDINAL SECTION
THROUGH
CAPRINTERIA FIELD
WEST
PLATFORM HOGAN
EAST
STRUCTURE CONTOURS ON TOP F1 ZONE
CONTOUR INTERVAL 100 FT
PRC 7911
OCS-P 0166
PLATFORM HOGAN
PLATFORM HOUCHIN
MIOCENE
MAIN PRODUCTIVE INTERVAL
SECTION PENETRATED AT CARPINTERIA FIELD
PLEISTOCENE
VENTURA BASIN
STRATIGRAPHIC COLUMN
PRODUCED
CARPINTERIA FIELD TYPE LOG
PLATFORM HOGAN
“G” SERIES
“E” SERIES
“F” SERIES
HOGAN MONTHLY PRODUCTION BEFORE PURCHASE
PLATFORM HOGAN
PEAK PRODUCTION
403,934 Bbl/mo
October, 1968
Gross (
Oil (Bbl
WATER
100000
PURCHASE BY SIGNAL
18,738 Bbl/mo
July, 1990
OIL
Jun-90
Jun-88
Jun-86
Jun-84
Jun-82
Jun-80
Jun-78
Jun-76
Jun-74
Jun-72
Jun-70
10000
Jun-68
LOGARITHMIC PRODUCTION (Bbls/mo)
1000000
OPPORTUNITIES
 Workovers
 Continue conversion from gas lift to rod pumps
 Waterflood
by 1993….
 Strategic redrilling
GEOLOGIC CHALLENGES
 Co-mingled production
 Hard to allocate production among zones
 Sparse core data
 Most porosity/permeability data from logs
 Sparse pressure data
 Can’t use pressure regimes to establish fault blocks
 Few dipmeters
 Little help in locating faults
 Inclined oil/water contacts
 Confuses fault interpretation
CARPINTERIA FIELD
OIL-WATER CONTACTS
Carpinteria Field
F-Series Oil/Water Contacts
-2200
-2400
P-0240
P-0166
STATE LEASES
-2600
Subsea Depth
-2800
F1
F2
-3000
F2A
F3
F4
-3200
F5
F6
-3400
-3600
-3800
-4000
998000
1000000
1002000
1004000
1006000
1008000
Zone 6 X-value
1010000
1012000
1014000
1016000
STRATEGIES
 Improve production with workovers/RTPs
 Prepare for waterflood and redrills
 Geologic and petrophysical studies
 Participate in Department of Energy programs
 Advanced Reservoir Management project - geologic and
reservoir studies
 Class III - financial assistance with redrills
 Leverage resources through technology
 Digitize well logs and field reports
 Link employees and consultants electronically
 Use 3-D computer modeling
CARPINTERIA PROJECT
Detailed Log Correlation
Using True Stratigraphic
Thickness Traces in
AutoCad-LT
SATURATION CONDITION OF F4 ZONE WELLS
808000
806000
FULL OIL COLUMN
804000
PROBABLE FAULT
OIL / WATER CONTACT
WET INTERVAL
1000000
1005000
1010000
CONTOURS ON TOP F1
and
CONTOURS ON F1 O/W CONTACT
Lease P-0166
A52
AREA 1
AREA 2
PLANNED REDRILL WELL PATH
A48WB01 F1 ZONE
3 D MODEL VIEW OF 1999
CARPINTERIA FIELD
REDRILL PROGRAM
WELLS
RELATIONSHIP OF REDRILL PROGRAM TO EXISTING WELLS
EAST HOGAN AREA
REDRILL BOREHOLE
EXISTING BOREHOLE
COLLISION AVOIDANCE USING 3-D MODEL
CARPINTERIA FIELD
DEPOSITIONAL SETTING
EXAMPLE DUAL INDUCTION LOG
Well A48
SP
Zone F3
RESISTIVITY
SAND
SHALE
CROSS SECTION ALONG PATH OF REDRILL
A49WB01
Fault
F3
Zone
RESULTS OF 1998 REDRILL PROGRAM
SHOWING REDRILL TRAJECTORIES
AND COMPLETED INTERVALS
A44WB02
A14WB01
Platform Hogan
A22WB01
A48WB02
Zone F1
Zone F2
Zone F3
Multiple zones
A49WB01
A43WB01
Ja
n89
Ja
n90
Ja
n91
Ja
n92
Ja
n93
Ja
n94
Ja
n95
Ja
n96
Ja
n97
Ja
n98
Ja
n99
Ja
n00
Jan-98
Jan-95
Jan-92
Jan-89
Jan-86
Jan-83
Jan-80
LOGARITHMIC PRODUCTION (Bbls/mo)
100000
Jan-77
Jan-74
Jan-71
Jan-68
LOGARITHMIC PRODUCTION (Bbls/mo)
HOGAN MONTHLY PRODUCTION SINCE PURCHASE
PLATFORM HOGAN
PLATFORM HOGAN
1000000
100000
10000
REDRILL PROGRAM
14,721 Bbl/mo Increase
PURCHASE
10000
WHAT’S NEXT?
 MORE THAN 30 SIMILAR REDRILL PROJECTS
ARE AVAILABLE FROM PLATFORMS HOGAN
AND HOUCHIN
 GRASS ROOTS HORIZONTALS ARE BEING
STUDIED BELOW HOBSON FAULT AND INTO
NEIGHBORING STATE LEASES
 DEEP POSSIBILITIES EXIST IN OLDER
MIOCENE SECTIONS
NOT THE END……..