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Geo-X SIM GEOX Experience
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1
Resource Assessment Using GeoX: The Philippine DOE
Experience
Simplicio P. Caluyong
• Acknowledgement to the following:DOE – for allowing me to present some of the PhilPRA materialsGeoknowldge – for allowing me to use some materials from the 1st PPM Cambodia workshop
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Outline• The PhilPRA Project• PRA Methodology• Risking guidelines and Classification
system • GeoX Tools• Volumetric calculation• Conclusions
PhilPRA Project Profile
• Funding Agency: NORAD• Implementing Agency: DOE• Consultant: The Bridge Group AS• Technical Grant: NOK 5.548• Duration: Sept 2000 to March 2002
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Overview
• Establish a competent, professional group in DOE which in their own capacity can build and update a Petroleum Resource Inventory
• Publish the first issue of a Petroleum Resource Inventory of the Philippines
Main Objectives
Overview
• Develop a Petroleum Resource Classification System and Guidelines
• Develop a Risking System
Specific Objectives
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Output• Performed Basin Modeling on key basins• Performed Reservoir- and Production
Simulation on selected fields• Established routines for sustainable resource
assessment• Provided training programs• Compiled an overview of the Total Petroleum
Resources of the Philippines
Courses and education• Resource Assessment in a Resource
Management context• Data compilation and mapping • Resource assessment using GeoX • Basin modeling using Terramod • Reservoir simulation in PGS Headquarters in
Oslo, Norway• On the job training all throughout the project
period• Closing Seminar
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Outline• The PhilPRA Project• PRA Methodology• Risking guidelines and Classification
system • GeoX Tools• Volumetric calculation• Conclusions
Database• Seismic and other geophysical data
– More than 500,000 seismic line km• Well data
– More than 500 wells drilled• Onshore field data
– Samples (rock and seep)– Mapping
• Evaluations & Assessments– World bank report 1986– Contractor’s reports– Project reports and literature
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PhilPRA Work Flow
GATHER DATA
DIGITIZE PROSPECT
ANALYZE RESOURCES
IN GEOX
BUILD INPUT GUIDE
RESOURCE CLASSIFICATION SYSTEM RISK MODEL
GENERAL/PUBLISHEDREPORTS
BASINEVALUATION
REPORTSSEISMIC
WELL/PROD.
REPORTS
WELLLOGS
BASINOUTLINE/
POTENTIAL
PLAYTYPESPROSPECTS/LEADS
ROCK VOLUME VOLUME/RESERVOIR
DATA
PROSPECT ANALYSIS
(gProspectR)
DISCOVERYANALYSIS
(gDiscovery)
PLAYANALYSIS(gPlayR)
PORTFOLIOANALYSIS(gPortfolio)
DiscoveryAnalysis
Project Organization & Methods
Prospect Analysis Play Analysis
5Prospect input
to GeoX
2Digitizing/Mapping
1Reservoir/
Engineering
3Basin
Modelling
4Seismic Review/
Interpret.6
CRSMapping
7Play Analysis
In GeoX
8Support/QA/QC
PhilPRAObjectives
PhilPRAResults
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Petroleum System Concept
Reservoir/Seal distribution
Limit of mature and active Source
Play 2 (confirmed)Play 1
(unconfirmed)
Source Rock Distribution
Field/Discovery
Prospect
Geographical extent of Petroleum System
Definition of play types
• Defined based on the first order closure process (Duff and Hall, 1996)
• Emphasizes the closure as the key element of a play
• Identified six play families (AN, RB, FB, ST, MD, BD)
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Examples of play types
• Reef buildup family play (RB)– Main Process:
Biological and depositional processes
Example of play types
• Extensional fault block family play (FB)– Main Process:
Extensional tectonism
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Outline• The PhilPRA Project• PRA Methodology• Risking guidelines and Classification
system• GeoX Tools• Volumetric calculation• Conclusions
TOTALRECOVERABLE
RESOURCES
RESERVES POTENTIALRESOURCES
HYPOTHETICALRESOURCES
(MAPPED)
SPECULATIVERESOURCES(UNMAPPED)
PROVED UNPROVED
DEVELOPEDUNDEVELOPED
PRODUCING NONPRODUCING
PROBABLERESERVES
POSSIBLERESERVES
DISCOVEREDRECOVERABLE
RESOURCES
UNDISCOVEREDRECOVERABLE
RESOURCES
PROSPECTS LEADS CONFIRMEDPLAYS
UNCONFIRMEDPLAYS
MAY BEDEVELOPED
DEVELOPMENTNOT VERY
LIKELY
certainty
The Philippine Classification System
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Seismic mapping
Seismic line Prospect Lead
Prospect or lead?PROSPECT• A potential petroleum trap
defined by a grid of seismic lines (at least 2 lines)
• A mapped rock volume
LEAD• A potential petroleum trap
defined by only 1 seismic line
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Risk FactorsPlay:
Reservoir facies distributionSufficient mature source rockTiming
Prospect:Effective porosityExistence of StructureExistence of Effective SealMigrationRetention after Accumulation
PROSPECT ANALYSIS-RISKING
Pporosity (0.4) – there is limited data on turbiditic reservoirs, no onshore description.
Pgeom.body (0.9) – the structure is clearly defined by seismic data
Pseal (0.9) – good sealing mechanisms exist as seen from seismic
Pmigration (0.6) –good seismic data indicates probable source at the deeper parts,
Pretention (0.4) – the presence of late faulting as seen in seismic that may be reactivated.
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Play Analysis Methods
• Common Risk Segment maps (CRS)– Charge– Reservoir– Seal
• Composite CRS maps (CCRS)– For each play type
Reservoir facies PpTechnical tests criteriaPrf – Reservoir facies
Quantitative probability
range
One or more reservoir rock units are found in all wells in the play area.
Facies modeling and seismic data clearly indicates that the reservoir unit is also present in between wells.
0.8-1.0
One or more reservoir units are found in at least one well in the play area.
Convincing seismic data clearly indicate a regional distribution of the unit.
0.6-0.8
Based on the available data, it is equally probable that there is a regionally distributed reservoir unit as not. 0.4-0.6
Unconvincing seismic and/or well data indicate that a reservoir unit is present in the play area.
The presence is based on an analog model
0.2-0.4
• Unambiguous seismic data and well data establish that a reservoir unit is not regionally present in the play area. 0.0-0.2
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Outline• The PhilPRA Project• PRA Methodology• Risking guidelines and Classification
system• GeoX Tools• Volumetric calculation• Conclusions
GeoX 5.03
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GeoX Tools
gPlayR gProspectR gFullCycle
DB
gPortfolioExcel, Spotfire etc.
Analysis Exportand Import
gField
gDiscovery
gProfile
GeoX
Source: Geoknowledge
Features of GeoX ToolsUniform & consistent syntaxThere is a common set of functions and options across tools for accessing, editing, estimating, storing, printing and exchanging analysis.Rapid calculation of simple analysisEasy to use, structured approach
Source: GeoX User’s Guide
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GeoX Setup in DOESystem
Client/server version, GeoX5.0.33 simultaneous licenses
ManpowerSystem Administrator3 users (GeoX assessment team in PhilPRA)
Data requirements in GeoXCultural & Geol. data Rock Volume
Volume &Reservoir
Parameters•Resource classification system
•Risk model
•Other cultural data (e.g. lithology, chronostrati-graphy, blocks)
•Gross rock volume; or
•Area, thickness, geometric factor
•Net to gross ratio
•Porosity
•Oil, gas saturation
•Fraction gas HCPV
•Recovery factor (O,G,C)
•Bo
•Bg
•GOR
•CGR
LOGNORMAL DISTRIBUTIONS
16
Outline• The PhilPRA Project• PRA Methodology• Risking guidelines and Classification
system• GeoX Tools• Volumetric calculation• Conclusions
Description page:Text summary Properties (subsurface, location, analysts)Strat columnBlocks (block description, license or contract)
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• Classification of the HC phases based on resource classification system
Note that the resource classification system was customisedduring the initial installation of GeoX.
Volume & reservoir parameters• Input parameter guide/table
Volume ParametersType of distribution Min Mode Max Data source
Gross rock volume (m3) Ln2LoHi Digitised map from company reports
Area (m2) Ln2LoHi Digitised map from company reports
Reservoir Thickness (m) Ln3Mod Well/general reports, logs
Geometric factor Ln3Mod Trap geometry multiplier, maps/reports
Net/Gross Ratio (decimal) Ln3Mod Well/general reports, logs, seismic sections
Porosity (decimal) Ln3Mod Well/general reports, logs
HC Saturation (decimal) Ln3Mod Well/general reports, logs
Trap fill Constant Well/general reports, logs
Fraction gas HCPV (decimal) Ln3Mod Well/general reports, logs
Recovery factor Oil (decimal) Ln3Mod Well/general reports, DST
Recovery factor Gas (decimal) Ln3Mod Well/general reports, DST
Recovery factor Condensate (decimal) Ln3Mod Well/general reports, DST
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Rock Volume• Get prospect/lead maps from
company reports.
• Screen area of prospect. Economic cutoff in PhilPRA (A >1million m2).
• Decide on the min and max closure.• Digitize the prospect contour map.• Convert to depth if necessary.• Calculate the GROSS ROCK
VOLUME directly (or Area) in GeoCad.
• Print a prospect structure map, pass on to GeoX assessment team.
Seismic
• Get the seismic sections that cross the prospect.
• Use the section:– To measure the reservoir thickness
(A * T * Geo. Factor =GRV)– In risking the prospect
Trap geometry multiplier (From White, 1987)
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• Input of volume estimates in the volume parameter page
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• Input reservoir data in the reservoir parameter page
Volume & reservoir parametersVolume & reservoir parameters
Reservoir ParametersType of distribution Min Mode Max Data source
Oil Form. Factor (Bo) (m3/m3) Ln3Mod depth dependent Vasquez-Beggs equation (reports, logs, DSTs)Gas Form. Factor (Bg*1000)(m3/1e3m3) Ln3Mod depth dependent
Well/general reports, logs, DSTs (equation of state)
Gas Oil Ratio (m3/m3) Ln3Mod depth dependent Vasquez-Beggs equation (reports, logs, DSTs)
Condensate Yield*1000 (m3/1e3m3) Ln3Mod depth dependent Company reports, logs, DSTs
21
• Note that the risk model is customized during the initial installation of GeoX
Probability estimates in the risk parameter page
Results table in GeoX
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• Export results to excel– Calculate for total volume using mean values– Prepare plots
• Analyze data to rank prospects and leads as well as the ranking of all sedimentary basins as a tool for an effective strategy for exploration and investment promotion
What did DOE do with the results?
TOTAL RECOVERABLE RESOURCES
433
1283
0
500
1000
1500
2000
2500
3000
3500
Oil NatGas
Mill
ion
bbl o
.e
P95 P90 P75 P50 P25 P10 P05
NW Palawan
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Undiscovered resourcesTotal Oil Gas Condensate
Million bbl o.e. (Mean)
Million bbl
(Mean)
Billion cf (Mean)
Million bbl (Mean)
Undiscovered Resources 7,922 3,461 24,690 56 Hypothetical (Mapped) Resources 2,848 1,341 8,112 55 Speculative (Unmapped) Resources 5,074 2,120 16,578 0
Resource Class
OIL44%
GAS55%
CONDENSATE1%
TOTALRECOVERABLE
RESOURCES
RESERVES POTENTIALRESOURCES
HYPOTHETICALRESOURCES
(MAPPED)
SPECULATIVERESOURCES(UNMAPPED)
PROVED UNPROVED
DEVELOPEDUNDEVELOPED
PRODUCING NONPRODUCING
PROBABLERESERVES
POSSIBLERESERVES
DISCOVEREDRECOVERABLE
RESOURCES
UNDISCOVEREDRECOVERABLE
RESOURCES
PROSPECTS LEADS CONFIRMEDPLAYS
UNCONFIRMEDPLAYS
MAY BEDEVELOPED
DEVELOPMENTNOT VERY
LIKELY
Basin ranking
• Main ranking criteria– Total resource volume– Size distribution– Probability of Success (POS)
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Petroleum resource distribution
0
100
200
300
400
500
600
C Luzon
NW Pa
lawan
SW Pa
lawan
Visayan
Mindoro-Cuyo
E Palaw
an
Reed Bank
Cotabato
Sulu Se
a
Agusan-D
avao
SE Luzon
Cagayan
West L
uzon
Iloilo-W
MasbateIlo
cos
Bicol Sh
elf
CONDENSATEOIL
GAS
Million
bbl o.
e.
Size distributions
<60 60-300 300-600 >600Central Luzon 36 3 16 15 1 4Reed Bank 6 4 0 1 2 3SW Palawan 12 9 3 6 0 3Mindoro-Cuyo 45 4 15 22 6 2Agusan-Davao 9 2 2 3 3 1E Palawan 24 4 3 17 4 0NW Palawan 28 15 16 10 2 0Visayan 81 8.5 46 34 1 0Sulu Sea 21 5 8 12 1 0Cotabato 17 6 6 10 1 0SE Luzon 31 3 20 11 0 0Iloilo-W Masbate 3 2 1 2 0 0Cagayan 7 7.3 6 1 0 0W Luzon 7 1.3 7 0 0 0Ilocos 1 1.3 1 0 0 0Bicol Shelf 0 0 0 0 0 0
No. of Prospects /
Leads
Probability of Success
(% )
Size Distribution (Million bbl o.e.)Basin
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Ranking of basinsGroup A
1. Northwest Palawan
2. Southwest Palawan
3. Central Luzon
4. Visayan
5. Mindoro-Cuyo
6. Cagayan
Group B
1. East Palawan
2. Southeast Luzon
3. Reed Bank
4. Cotabato
5. Agusan-Davao
6. Sulu Sea
Group C
1. West Luzon
2. Ilocos
3. Bicol Shelf
4. West Masbate-Iloilo
PROSP
ECTI
VITY
PROSPECTIVITY
Outline• The PhilPRA Project• PRA Methodology• Risking guidelines and Classification
system• GeoX Tools• Volumetric calculation• Conclusions
26
Conclusions• GeoX as the main tool for resource volumetric
calculation have been very effective in the PhilPRA Project
• Version upgrades created some problems, particularly with analysis done by previous versions
• GeoX do not have the flexibility when presenting the results such as plots or graphs
• Overall support from Geoknowledge was excellent
GeoX tools purchased by the PPM Project
• gPlayR - play-level prospectivity and risk analysis
• gProspectR - prospect-level prospectivity and risk analysis
• gDiscovery - resources in a proven accumulation
• gPortfolio - resources in an asset portfolio
Source:Geoknowledge
27
Thank you!
http://www.ccop.or.th/projects/PPM.html