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Carbon Capture and Sequestration Analysis of Options. WESTCARB Annual Meeting October 28, 2004 David Cheng MIT. Our Role in WESTCARB. Help integrate data Store data on consistent basis Easily display data in various combinations Perform queries and simple manipulations Perform analyses

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carbon capture and sequestration analysis of options

Carbon Capture and SequestrationAnalysis of Options

WESTCARB

Annual Meeting

October 28, 2004

David Cheng

MIT

our role in westcarb
Our Role in WESTCARB
  • Help integrate data
    • Store data on consistent basis
    • Easily display data in various combinations
    • Perform queries and simple manipulations
  • Perform analyses
    • e.g., Cost estimation, source/sink matching
    • Initial screening to help identify potential projects
co 2 sequestration overview
CO2 Sequestration: Overview

Source: Economic Evaluation of CO2 Storage and Sink Enhancement Options (TVA Report to DOE)

Capture

Storage

Transport

gis models for geological carbon sequestration
GIS Models for Geological Carbon Sequestration
  • CO2 Capture Cost Model
    • Provided by SFA Pacific
  • CO2 Storage Capacity Model
  • CO2 Injectivity and Injection Cost Model
  • CO2 Transportation Cost Model
  • Source-Reservoir Matching Model
co 2 storage capacity model
CO2 Storage Capacity Model
  • Aquifer reservoir
    • Q = storage capacity of entire aquifer (MtCO2)
    • V = total volume of entire aquifer (km3)
    • p = reservoir porosity (%)
    • e = storage efficiency (%)
    • pCO2 = CO2 density (kg/m3)
  • Required Reservoir Data:
    • Geographical Extent and Thickness
    • Reservoir Porosity
    • Reservoir Pressure and Temperature (may be estimated from depth)
co 2 injectivity model
CO2 Injectivity Model

User Controlled Inputs:

CO2 flow rate

Downhole injection pressure

Intermediate Calculations:

CO2 viscosity

CO2 mobility

CO2 injectivity rate per well

Final Output:

# of injection

wells

Reservoir Characteristics:

Depth

Thickness

Permeability

Pressure

Temperature

injection cost estimation
Injection Cost Estimation

Capital Cost:

Site screening

Well drilling

Injection equipment

# of wells

Annual CO2 injection cost

Capital Charge Rate

O&M Cost:

Normal daily expense

Surface maintenance

Subsurface maintenance

Consumables

CO2 injection cost

$ /ton

CO2 flow rate

co 2 transportation cost model
CO2 Transportation Cost Model
  • Pipeline Diameter
    • D = f (CO2 flow rate)
  • Lowest-Cost Pipeline Route Selection
    • Existing right-of-way
    • Land use and land cover
    • River crossing
    • Railroad/road crossing
    • Population density
    • Slope
  • Pipeline Construction and O&M Cost
source reservoir matching
Source-Reservoir Matching
  • One-to-one matching
    • For a given CO2 source, identify CO2 reservoir(s) that minimize the total transport and injection cost under the capacity constraint
  • Many (sources) to one (reservoir) matching
    • Sharing pipeline
    • Minimize the total cost of the sub-system under the capacity constraint
  • Many-to-many matching
    • System analysis that considers capture, transport, and storage costs subject to capacity constraints
some key outstanding issues
Some Key Outstanding Issues
  • Missing data (e.g., permeability)
  • Reservoir capacity calculation methodology not well defined. We basically calculate “available pore space” and apply an empirical “storage efficiency factor”
  • Little data exists on seal characteristics of reservoir