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![Page 1: Http:// December 12, 2002 Improved Oil Recovery in Mississippian Carbonate Reservoirs of Kansas DE-FC22-93BC14987 Timothy R. Carr, Dana Adkins-Heljeson,](https://reader036.vdocument.in/reader036/viewer/2022062802/56649ea75503460f94ba9570/html5/thumbnails/1.jpg)
December 12, 2002http://www.kgs.ku.edu
Improved Oil Recoveryin Mississippian
Carbonate Reservoirsof Kansas
DE-FC22-93BC14987 Timothy R. Carr, Dana Adkins-Heljeson,
Saibal Bhattacharya, Alan P. Byrnes,Evan K. Franseen, Paul Gerlach,
Willard (Bill) Guy, Richard Pancake,and W. Lynn Watney
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December 12, 2002http://www.kgs.ku.edu
Kansas Challenges• Small Independent Producers
– 3,000 Oil and Gas Operators
• Wells (33,104 wells < 5 BOPD)– Low Rate, High Water Cut
• Inadequate Reservoir Characterization
• Drilling and Completion Design Problems
• Low Recovery Factors– Non-Optimal Primary Recovery
• Operations at or Near Economic Limits
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December 12, 2002http://www.kgs.ku.edu
Kansas Approach• Develop Cost-Effective Technologies
– Reservoir Description and Management• Using “best” data
– Evaluation Methods– Spreadsheet log analysis software (PfEFFER)– Online Dissemination
• Information• Technology
– Demonstration• Horizontal Drilling• Infill Drilling
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December 12, 2002http://www.kgs.ku.edu
Total Production 6.6+ Billion Barrels
Regan & Granite2 %
ARBUCKLE32 %
Upper & MiddleOrdovician
8 % Hunton1 %
Pennsylvanian(Virgilian)
3 %
Pennsylvanian(Missourian)
23 %
Pennsylvanian(Desmoisian)
8 %
Pennsylvanian(Morrow)
3 %Pennsylvanian
(Other)1 %
Mississippian
19 %
Large Potential Target
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December 12, 2002http://www.kgs.ku.edu
Large Potential Target
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December 12, 2002http://www.kgs.ku.edu
Ness County, Kansas
• Numerous Targets– Regional Level
• Numerous Targets– Regional Level
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December 12, 2002http://www.kgs.ku.edu
Schaben Field
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December 12, 2002http://www.kgs.ku.edu
Schaben: Vertical Sequence
0.00 100.00 200.00 300.00 400.00
Minipermeability (md)Oil
Stain
Dolo Wacke-Packstone
Grainstone
Lime or DoloMudstone - Wackestone
Silt-Shale Fill
Late Stage BrecciationOriginal Facies Indeterminate
Chert
Brecciation
4430.0
4435.0
Ritchie Exploration#1 Foos "A-P" TwinNE SW SW Sec. 31-T19S-R21WNess County, Kansas
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December 12, 2002http://www.kgs.ku.edu
Reservoir FaciesSkeletal Wackestone - Packstone
Ritchie 2 Schaben PRitchie 2 Schaben P
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December 12, 2002http://www.kgs.ku.edu
Depositional Model
Shelf
Skeletal Bank
Shoal Island
Lagoon
SkeletalBank
RestrictedShelf
Tidal Channel
Tidal
Flat
Silty Mudstoneand Wackestone
Mudstone andWackestone
Packstone andGrainstone
Wackestone andPackstone
Mudstone andEvaporites
Schaben Field
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December 12, 2002http://www.kgs.ku.edu
Perforation: 4400-4404Produced 85 bopd & 132 bwpd
Perforation: 4400-4404Produced 85 bopd & 132 bwpd
Super Pickett Plot
Reservoir PorositySaturationPay HeightBVW
Super Pickett Plot
Reservoir PorositySaturationPay HeightBVW
Petrophysical Analysis
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December 12, 2002http://www.kgs.ku.edu
PfEFFER
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December 12, 2002http://www.kgs.ku.edu
Remaining Oil Saturation
• Poor Lateral Drainage• Poor Lateral Drainage
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December 12, 2002http://www.kgs.ku.edu
Reservoir Simulation Infill Drilling Targets
So > 40% & Payheight > 20 ft.
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December 12, 2002http://www.kgs.ku.edu
Schaben Field Production
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December 12, 2002http://www.kgs.ku.edu
Horizontal Wells• Tools for Identifying Candidate Applications
– Production Data Analysis– Geologic Mapping– Integration of Production and Geologic Data– Field & Lease Level Volumetrics
• Reservoir Characterization/Simulation• Field Demonstration - Horizontal Infill Well
– Completed and Planned
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December 12, 2002http://www.kgs.ku.edu
IntegratingProduction & Geologic DataPoor Sweep - Vertical Wells in Updip Stratigraphic Trap
Welch-Bornholdt-Wherry FieldRice CountyKansas
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December 12, 2002http://www.kgs.ku.edu
Field Level Volumetrics OOIP/Qtr Section
0
0000
20S/7W
123456
7 8 9 10 11 1 2
1 3141 5161718
19 20 21 2 2 23 2 4
2 5262 7282 930
31 32 33 3 4 35 3 6
20S/6W
123456
7 8 9 10 11 12
131 415161718
19 20 21 22 2 3 24
252627282930
31 32 33 34 3 5 36
20S/5W
456
7 8 9
161718
19 20 21
2930
31 32
1
12
1 3
21S/7W
123456
7 8 9 10 11 12
1314151 61718
21S/6W
123456
7 8 9 1 0 11 1 2
1 3141 5161718
56
7 8
1718
Welch-Bornholdt-Wherry FieldsDiscovered: 1924Producing Reservoir: Mississippian OsageTrap Type: StratigraphicCumulative Production: 60 MMBO
Original Oil in Place per Quarter SectionCI: 500 MBO / qtr. section
Using data from one type wellper 1/4 section
= 10 MMBO
= 5 MMBO
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December 12, 2002http://www.kgs.ku.edu
Field Level VolumetricsRecovery Efficiency
0
60
0
20
20S/7W
123456
7 8 9 10 11 1 2
1 3141 5161718
19 20 21 2 2 23 2 4
2 5262 7282 930
31 32 33 3 4 35 3 6
20S/6W
123456
7 8 9 10 11 12
131 415161718
19 20 21 22 2 3 24
252627282930
31 32 33 34 3 5 36
20S/5W
456
7 8 9
161718
19 20 21
2930
31 32
1
12
1 3
21S/7W
123456
7 8 9 10 11 12
1314151 61718
21S/6W
123456
7 8 9 1 0 11 1 2
1 3141 5161718
56
7 8
1718
0
60
0
20
Recovery Efficiency per Quarter SectionCI: 2%
= 18%
Welch-Bornholdt-Wherry Fields
= 2%
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December 12, 2002http://www.kgs.ku.edu
Ness County, Kansas
• Numerous Targets– Regional Level
• Numerous Targets– Regional Level
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December 12, 2002http://www.kgs.ku.edu
Ness City North Field
• Numerous Targets– Local Level
• Numerous Targets– Local Level
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December 12, 2002http://www.kgs.ku.edu
Reservoir CharacterizationGeologic Model
Geologic model: log (Gr, Res), core, production, DST data
Maps & cross-sections of Mississippian sub-units: 5 layered reservoir model
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December 12, 2002http://www.kgs.ku.edu
Reservoir CharacterizationGeologic Model
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December 12, 2002http://www.kgs.ku.edu
Reservoir SimulationMapping Residual Potential
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December 12, 2002http://www.kgs.ku.edu
Reservoir Heterogeneity• Strong Horizontal
Heterogeneity– 10’ - 100’ Interval
– Karst Controlled
• Result Poor Lateral Drainage
• Strong Horizontal Heterogeneity– 10’ - 100’ Interval
– Karst Controlled
• Result Poor Lateral Drainage
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December 12, 2002http://www.kgs.ku.edu
Initial Production
IP: 85 BOPD & 54 BWPD (4/29/00)
Daily Prod:
55 BO& 50 BW
for 2-1/2 months (May to mid-July)
with 1000’ of fluid over pump
IP: 85 BOPD & 54 BWPD (4/29/00)
Daily Prod:
55 BO& 50 BW
for 2-1/2 months (May to mid-July)
with 1000’ of fluid over pump
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December 12, 2002http://www.kgs.ku.edu
Complete Production Loss
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December 12, 2002http://www.kgs.ku.edu
Lessons Learned • Operational Flexibility (Maintain Your Options)
– New Well vs. Reentry– Hole Size– Drilling Fluids– Case off the Curve– Line the Lateral
• Good Planning• Communication• “The Lateral is a Piece of Cake”• Horizontal Heterogeneity
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December 12, 2002http://www.kgs.ku.edu
Ness City North Production
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December 12, 2002http://www.kgs.ku.edu
Well and Production Data
Ness City North
Schaben
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December 12, 2002http://www.kgs.ku.edu
Ness City North
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December 12, 2002http://www.kgs.ku.edu
Well and Production Data
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December 12, 2002http://www.kgs.ku.edu
Gemini Modular Approach
KGS Server
apache - jserv
KGS Database & Files
Gemini User/Project
Module
Gemini User/Project
ModuleWell
Profile Module
Well Profile Module
PfEFFER Module
PfEFFER Module
DST Module
DST Module
Volumetrics Module
Volumetrics Module
Cross Section Module
Cross Section Module
Material Balance Module
Material Balance Module
Synthetic Seismic Module
Synthetic Seismic Module
PVT Module
PVT Module
Rock CatalogRock
Catalog
KHANKHAN
Fluid CatalogFluid
Catalog
Well Level Analysis Applets Field Level Analysis Applets
Rock & Fluid Characteristics Applets
Java Servlets
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December 12, 2002http://www.kgs.ku.edu
Table: Formation Name Type GEMINI_USER_KID N(10) WELL_HEADER_KID N(10) ZONE_NUMBER N(6) API_NUMBER V(40) TYPE_OF_ZONE N(2) FORMATION_NAME V(40) DATA_SOURCE V(40) START_DEPTH N(8,2) END_DEPTH N(8,2) DATE_MODIFIED D PFEFFER_KID N(10)
Table: Formation Name Type GEMINI_USER_KID N(10) WELL_HEADER_KID N(10) ZONE_NUMBER N(6) API_NUMBER V(40) TYPE_OF_ZONE N(2) FORMATION_NAME V(40) DATA_SOURCE V(40) START_DEPTH N(8,2) END_DEPTH N(8,2) DATE_MODIFIED D PFEFFER_KID N(10)
Gemini -Well Profile Module
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December 12, 2002http://www.kgs.ku.edu
Gemini -PfEFFER Module
Table: Pfeffer_Computed Name Type PFEFFER_KID N(10) BUTTON N(2) BUTTON_ORDER N(4) BUTTON_SELECTED N(2) LAS_KID N(10) RADIO_BUTTON N(2) CURVE_NUMBER N(4) CURVE_MNEMONIC V(100) VALUE N VALUE2 N CORRECTED N(2) CORRECTED_VALUE N TRACK N(2)
Table: Pfeffer_Computed Name Type PFEFFER_KID N(10) BUTTON N(2) BUTTON_ORDER N(4) BUTTON_SELECTED N(2) LAS_KID N(10) RADIO_BUTTON N(2) CURVE_NUMBER N(4) CURVE_MNEMONIC V(100) VALUE N VALUE2 N CORRECTED N(2) CORRECTED_VALUE N TRACK N(2)
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December 12, 2002http://www.kgs.ku.edu
Gemini -Volumetric Module
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December 12, 2002http://www.kgs.ku.edu
Kansas Approach• Develop Cost-Effective Technologies
– Reservoir Description and Management• Using “best” available data
– Evaluation Methods– Spreadsheet log analysis software (PfEFFER)– Online Dissemination
• Information• Technology
– Demonstration• Horizontal Drilling• Infill Drilling