Resource Assessment of Oil & Gas, Coal-Bed Methane,

and Geothermal Resources in Western Washington

Department of Geology

Portland State University

M. Cummings, J. Jackson, D. Percy

Objectives

• Phase One: Review literature to identify play concepts and data for subsequent evaluation

• Phase Two: Evaluate and tabulate data for use in subsequent evaluation

Phase One Activities

• Compile and review existing literature relating to oil and gas resources

• Compile and review existing literature relating to coal-bed methane resources

• Compile and review existing literature relating to geothermal resources

• GIS review of existing physical and digital maps

Phase One Products

• Annotated Bibliography

• Database of existing digital and map resources

Phase Two Activities

• Enter oil & gas related data into digital database

• Enter coal-bed methane related data into digital database

• Enter geothermal related data into digital database

Phase Two Products

• Database of oil & gas, coal-bed methane, and geothermal energy resources, with evaluation of utility for subsequent analysis.

• Preliminary map showing areas of high, medium, and low resource potential for oil & gas, coal-bed methane, and geothermal energy resources.

Phase Three: Resource Assessment

• Petroleum Systems Assessment

• Coal-Bed Methane Systems Assessment

• Geothermal Systems Assessment

• Federal Land Assessment

• Preliminary Surface Impact Estimate

Petroleum Systems

Limit of Source Interval

Limit of Mature Source

Limit ofReservoirInterval

Limit of Seal Area of StructuralDeformation

Play Area

Play Summary Map

Seal

Reservoir

MatureSourceInterval

ImmatureSourceInterval

Trap

Migration

Cross-Section

• Source Rock• Maturation• Migration• Structure• Reservoir• Seal

Limit of Source Interval

Limit of Mature Source

Limit ofReservoirInterval

Limit of Seal Area of StructuralDeformation

Play Area

Play Summary Map

Seal

Reservoir

MatureSourceInterval

ImmatureSourceInterval

Trap

Migration

Cross-Section

Petroleum System Assessments

• Mass-Balance– Source Richness

– Source Volume

– Hydrocarbon Generation

– Hydrocarbon Migration

– Trapping Efficiency

– Hydrocarbon Recovery

• Play Summation– Minimum Field Size

– Maximum Field Size

– Minimum Number

– Maximum Number

– Monte Carlo Sum

Coal-Bed Methane System

Coal-Bed Methane Assessment

• Gas Research Institute Mass-Balance

• Coal area (a)

• Coal thickness (h)

• Average rock density (d)

• Average gas content (g)

• Gas-in-place = (1359.7) a h d g

Geothermal Systems

• Volcanic Center• Heat• Permeability• Water

Geothermal Assessment

• Identify appropriate volcanic terrain analogs

• Identify producing geothermal facilities from analog terrain.

• Adjust assessment to account for differences between assessed terrain and analog terrain.

Federal Land Assessments• Oil & Gas play area on Federal land

• Coal-Bed Methane play area on Federal land

• Geothermal terrain on Federal land

• Potential Gas Storage Centers on Federal Land

Mod

FederalLand

Resource Area

HighModerate

Preliminary Impact Estimates

• Oil & Gas – Surface foot print– Water resource impact

• Coal-Bed Methane – Surface foot print– Water production

• Geothermal facility – Surface foot print– Water production

Drill Pad (X acres)

Producer

Injector

ProcessingFacility

Pipeline

Phase Three Products• Oil & Gas Play Summary Maps

• Resource Assessments For Each Play

• Coal-Bed Methane Potential Maps

• Coal-Bed Methane Resource Assessments

• Geothermal Resource Maps

• Geothermal Resource Assessments

• Federal Land Assessments

• Preliminary Surface Impact Estimates

• Technical work recommendations

Publications

• 2003 AAPG Annual Meeting Poster – Salt Lake City, UT

• 2003 Pacific Section Meeting Poster – Long Beach, CA

• Open File Report

• Website – http://nwdata.geol.pdx.edu/BLM/

Summary

• Phase One: Literature Review

• Phase Two: Data Assembly

• Phase Three: Resource Assessment for Federal Lands

• Additional Phases: Field and Laboratory Studies to Improve Assessment

Area Ranking Map Based on Literature Review

Coal Bed Methane Ranking Map Based on Literature Review

Potential:LCBM – Low Coal Bed MethaneMCBM – Medium Coal Bed MethaneHCBM – High Coal Bed Methane

Geothermal Resource Ranking Map Based on Literature Review

Potential:

MGt – Medium Geothermal HGt – High Geothermal

Oil & Gas Ranking Map Based on Literature Review

Potential:MG – Medium GasHG – High Gas

MO – Medium Oil