Deep Gas Reservoir Play, Deep Gas Reservoir Play, Central and Eastern Gulf Central and Eastern Gulf
Dec 16, 2015
Deep Gas Reservoir Play, Central Deep Gas Reservoir Play, Central and Eastern Gulfand Eastern Gulf
SummarySummary
IntroductionIntroduction Petroleum System AnalysisPetroleum System Analysis Resource AssessmentResource Assessment Exploration StrategyExploration Strategy
IntroductionIntroduction
Gulf Coast Interior Salt Gulf Coast Interior Salt BasinsBasins
Gulf Coast Interior Salt Basins
Stratigraphy
Petroleum System AnalysisPetroleum System Analysis
Petroleum Source RocksPetroleum Source Rocks
Upper Jurassic Smackover lime mudstone Upper Jurassic Smackover lime mudstone beds served as an effective regional beds served as an effective regional petroleum source rockpetroleum source rock
Upper Cretaceous Tuscaloosa Marine Upper Cretaceous Tuscaloosa Marine shale beds served as a local source rockshale beds served as a local source rock
Upper most Jurassic and Lower Upper most Jurassic and Lower Cretaceous beds were possible source Cretaceous beds were possible source rocksrocks
Burial HistoryBurial History
North Louisiana North Louisiana Salt Basin Salt Basin
Cross SectionsCross SectionsLocationLocation
K’
North Louisiana Salt Basin North Louisiana Salt Basin Cross SectionCross Section
N S
VE: 32X
API: 1706920079
Burial History Profile Burial History Profile North Louisiana Salt BasinNorth Louisiana Salt Basin
- Sediment accumulation rates were greatest in the Jurassic (196-264 ft/my)
- 50-60% of the tectonic subsidence occurred in the Late Jurassic (135-157 ft/my)
North Louisiana Salt Basin, North Louisiana Salt Basin, Sabine Uplift Cross SectionSabine Uplift Cross Section
N S
VE: 22X
Burial History Profile NLSB, Sabine UpliftBurial History Profile NLSB, Sabine Uplift
North Louisiana Salt Basin, North Louisiana Salt Basin, Monroe Uplift Cross SectionMonroe Uplift Cross Section
N S
VE: 30X
North Louisiana Salt Basin Cross SectionNorth Louisiana Salt Basin Cross Section
W E
VE: 22X
Burial History Profile NLSB, Monroe UpliftBurial History Profile NLSB, Monroe Uplift
Mississippi Interior Salt Basin Mississippi Interior Salt Basin
Cross Section LocationCross Section Location
Mississippi Interior Salt Basin Mississippi Interior Salt Basin Cross SectionCross Section
VE: 16X
N S
Burial History ProfileBurial History ProfileMississippi Interior Salt BasinMississippi Interior Salt Basin
Thermal Maturation and Expulsion Thermal Maturation and Expulsion HistoryHistory
North Louisiana Salt BasinNorth Louisiana Salt Basin Cross Section LocationCross Section Location
K’
Model CalibrationModel Calibration
Thermal Maturation History Profile Thermal Maturation History Profile North Louisiana Salt BasinNorth Louisiana Salt Basin
Thermal Maturation Profile Cross Section Thermal Maturation Profile Cross Section North Louisiana Salt BasinNorth Louisiana Salt Basin
6,500ft
12,000ft
Average Maturation Depth
Hydrocarbon Expulsion Profile Hydrocarbon Expulsion Profile North Louisiana Salt BasinNorth Louisiana Salt Basin
Peak OilPeak Gas
Thermal Maturation History Profile NLSB, Thermal Maturation History Profile NLSB, Sabine UpliftSabine Uplift
Hydrocarbon Expulsion Plot NLSB, Hydrocarbon Expulsion Plot NLSB, Sabine UpliftSabine Uplift
Thermal Maturation History Profile NLSB, Thermal Maturation History Profile NLSB, Monroe UpliftMonroe Uplift
Hydrocarbon Expulsion Plot NLSB, Hydrocarbon Expulsion Plot NLSB, Monroe UpliftMonroe Uplift
Mississippi Interior Salt Basin Mississippi Interior Salt Basin
Cross Section LocationCross Section Location
Thermal Maturation History Profile Thermal Maturation History Profile Mississippi Interior Salt BasinMississippi Interior Salt Basin
Thermal Maturation Profile Cross Section Thermal Maturation Profile Cross Section
Mississippi Interior Salt BasinMississippi Interior Salt Basin
8,000ft
16,000ft
Average Maturation Depth
Hydrocarbon Expulsion PlotHydrocarbon Expulsion PlotMississippi Interior Salt BasinMississippi Interior Salt Basin
Peak Oil
Peak Gas
Comparison of NLSB and MISBComparison of NLSB and MISB
Modified from Mancini et al. (2006a)
Event Chart for Smackover Petroleum Event Chart for Smackover Petroleum System in the North Louisiana and System in the North Louisiana and
Mississippi Interior Salt BasinsMississippi Interior Salt Basins
Geologic ModelGeologic ModelSSW-NNE Section (B-B’)SSW-NNE Section (B-B’)
Oil MigrationOil MigrationSW-NE Section (B-B’)SW-NE Section (B-B’)
Gas MigrationGas MigrationSW-NE Section (B-B’)SW-NE Section (B-B’)
Gas Migration at 99 Ma Gas Migration at 99 Ma SW-NE Section (B-B’)SW-NE Section (B-B’)
Geologic ModelGeologic ModelNW-SE SectionNW-SE Section
Gas Migration ProfileGas Migration ProfileNW-SE SectionNW-SE Section
Gas Migration at 99 MaGas Migration at 99 MaNW-SE SectionNW-SE Section
Geologic ModelGeologic ModelN-S SectionN-S Section
Oil MigrationOil MigrationN-S SectionN-S Section
Gas Migration at 99 MaGas Migration at 99 MaN-S SectionN-S Section
Geologic ModelGeologic ModelN-S Section (Monroe Uplift)N-S Section (Monroe Uplift)
Oil MigrationOil MigrationN-S Section (Monroe Uplift)N-S Section (Monroe Uplift)
Gas Migration at 52 MaGas Migration at 52 MaN-S Section (Monroe Uplift)N-S Section (Monroe Uplift)
Resource AssessmentResource Assessment
Production DataProduction Data
Production DataProduction Data
Methodology for Resource Methodology for Resource AssessmentAssessment
Schmoker (1994)Schmoker (1994)
The mass of The mass of hydrocarbons generatedhydrocarbons generated from a petroleum source from a petroleum source
rock can be calculated by using the following equations:rock can be calculated by using the following equations:
1. (TOC wt%100)(FD)(VU) = MOG1. (TOC wt%100)(FD)(VU) = MOG
2. HI 2. HI OriginalOriginal – HI – HI PresentPresent = HG = HG
3. (MOG) (HG) (103. (MOG) (HG) (10-6-6kg/mg) = HCGkg/mg) = HCG
Where: TOC = total organic carbonWhere: TOC = total organic carbon
FD = formation densityFD = formation density
VU = volume of unitVU = volume of unit
MOG = mass of organic carbonMOG = mass of organic carbon
HI = hydrogen indexHI = hydrogen index
HG = hydrocarbons generated per gram of organic carbonHG = hydrocarbons generated per gram of organic carbon
HCG = hydrocarbon generated by source rock unitHCG = hydrocarbon generated by source rock unit
Key ParametersKey Parameters
Basin ParametersBasin Parameters
NLSB Platte River Software —NLSB Platte River Software —Gas GeneratedGas Generated
TOC = 1.0%Type II kerogenTransient heat flow6,400 TCF
By P. Li
NLSB Platte River Software —NLSB Platte River Software —Gas ExpelledGas Expelled
TOC = 1.0%Type II kerogen1,280 TCF
By P. Li
MISB Platte River Software —MISB Platte River Software —Gas GeneratedGas Generated
TOC = 1.5%Type II kerogenTransient heat flow3,130 TCF
By P. Li
MISB Platte River Software —MISB Platte River Software —Gas ExpelledGas Expelled
TOC = 1.5%Type II kerogenTransient heat flow843 TCF
Saturation threshold = 0.1
By P. Li
Comparison of Hydrocarbon Comparison of Hydrocarbon Generation & Expulsion VolumesGeneration & Expulsion Volumes
Method
hydrocarbon (bbls) hydrocarbon (bbls) 910×109
Oil (bbls) Oil (bbls) 580×109
Gas (TCF) Gas (TCF) 4,050
hydrocarbon (bbls) hydrocarbon (bbls) 1,540×109
Oil (bbls) Oil (bbls) 1,090×109
Gas (TCF) Gas (TCF) 3,130
Saturation Threshold Saturation Threshold 0.1
Oil (bbls) Oil (bbls) 442×109
Gas (TCF) Gas (TCF) 843
0.1
Expulsion
Generation
Generation
Mississippi Interior Salt BasinNorth Louisiana Salt Basin
Generation
Generation
2,870×109
832×109
14,177
Schmoker (1994)
970×109
1,280
Expulsion
2,640×109
1,715×109
6,400Platte River Software
Modified from Mancini et al. (2006b)
Gas ResourceGas Resource
*Assuming that 75% of total gas calculated with the Platte River Software Approach is from late cracking of oil in the source rock.
**Assuming a 1 to 5% efficiency in expulsion, migration and trapping processes.
Basin Gas Potentially Available (TCF)** Gas Produced (TCF)
NLSB
Potential Secondary Gas Resource
4,800 48 to 240 29
Gas Generated (TCF)*
2,350 23.5 to 115.5 13MISB
Exploration StrategyExploration Strategy
NLSB Thermal MaturationNLSB Thermal Maturation0
5 , 0 0 0
1 0 , 0 0 0
1 5 , 0 0 0
2 0 , 0 0 0
2 5 , 0 0 0
3 0 , 0 0 0
3 5 , 0 0 0
0 .0 1 .0 2 .0 3 . 0 4 .0
% R o
DE
PT
H (
fe
et)
0.55 1.3
12,000
7,000
0
5 , 0 0 0
1 0 , 0 0 0
1 5 , 0 0 0
2 0 , 0 0 0
2 5 , 0 0 0
3 0 , 0 0 0
3 5 , 0 0 0
0 .0 1 .0 2 .0 3 . 0 4 .0
% R o
DE
PT
H (
fe
et)
0.55 1.3
12,000
7,000
MISB Thermal MaturationMISB Thermal Maturation
0
5,000
10,000
15,000
20,000
25,000
30,000
35,000
40,000
0.0 1.0 2.0 3.0 4.0
% Ro
DE
PT
H (
feet
)
0.55 1.3
11,000
16,500
0
5,000
10,000
15,000
20,000
25,000
30,000
35,000
40,000
0.0 1.0 2.0 3.0 4.0
% Ro
DE
PT
H (
feet
)
0.55 1.3
11,000
16,500
Manila-Conecuh Thermal MaturationManila-Conecuh Thermal Maturation
Reservoir CharacteristicsReservoir Characteristics
Deep Gas Reservoir Areal DistributionDeep Gas Reservoir Areal Distribution
ConclusionsConclusions In the North Louisiana Salt Basin, Upper In the North Louisiana Salt Basin, Upper
Jurassic and Lower Cretaceous Jurassic and Lower Cretaceous Smackover, Cotton Valley, Hosston, and Smackover, Cotton Valley, Hosston, and Sligo have high potential to be deeply Sligo have high potential to be deeply buried gas reservoirs (>12,000 ft).buried gas reservoirs (>12,000 ft).
In the Mississippi Interior Salt Basin, In the Mississippi Interior Salt Basin, Upper Jurassic and Lower Cretaceous Upper Jurassic and Lower Cretaceous Norphlet, Smackover, Haynesville, Cotton Norphlet, Smackover, Haynesville, Cotton Valley, Hosston, and Sligo have high Valley, Hosston, and Sligo have high potential to be deeply buried gas potential to be deeply buried gas reservoirs (>16,500 ft).reservoirs (>16,500 ft).