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NITEC LLC

Frannie Tensleep in COZ

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What is COZ?

DOE/NETL Funded Software Project Software released February 2013 COZView is a Graphical User Interface COZSim is a Numerical Simulator Project Objective:

Develop an Easy-to-use Software Tool for the Simulation of CO2-EOR Processes with Minimal Amount of Data

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COZView

Interactively build the geologic model Creates consistent Relative Permeability and PVT

tables using correlations Verifies model volumetrics and saturation distributions

(OOIP and OIP) prior to making simulation runs Import or interactively define well locations Define well and field operating constraints/limits Submit simulation runs and automatically retrieve run

results Create economic parameter scenarios and calculate

NPV Optimize facility constraints

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COZSim

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COZSim

Built-in CO2 correlations as functions of pressure and temperature Pure CO2 properties CO2 solubility in aqueous phase CO2 solubility in oleic phase with HC gas CO2 swelling of oleic phase with HC gas Oleic phase density with CO2 and HC gas Phase viscosities that reflect CO2 solubility

User ONLY has to specify Black Oil information

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COZSim

Interfacial tension (IFT) based miscibility while using black oil data Based on the API of the oil and SG of the HC gas,

built-in correlations that estimate component molecular weights, C1 fraction, C2-C6 characteristics and C7+ properties

Using parachors to calculate IFT reduction due to partitioning of the CO2 in the oleic and gaseous phases.

Using IFT reduction to transition from immiscible to partially miscible, and finally to fully miscible conditions.

Demonstration Objectives

Build a representative simulation model of the Frannie Field, Tensleep Formation in COZ

Predict production/injection performance under CO2 injection

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Assumptions/Data Sources

Structure, Formation Properties -WGA, 2005, Wyoming Oil and Gas Fields; -Bighorn Basin ROZ Development, D. Mohrbacher, 17th CO2 Flooding Conference, Dec 2011

OOIP – estimated (Np = 0.35 * OOIP) Np – WOGCC database Stratigraphy – Field A Geological Study and

Comprehensive 3D Static Petrel Property Model Development, EORI, 1/10/2012

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Structure Map – Top Tensleep

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Structure Configuration

February 2010 10

Structure Configuration

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Model Boundaries

February 2010 12

Contour Values

February 2010 13

3D Structure View

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Structure

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I=51

J=69

Layer Properties

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Single Layer

Layer Properties

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PVT Properties

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PVT Properties

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Relative Permeability

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Relative Permeability

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Capillary Pressure

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Model Initialization

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Model Initialization

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Initialization Volumetrics

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OOIP 339.8 MMSTB (“known”)

Oil Saturation – 1/1/1935

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So = 1 - Swirr

Pressure – 1/1/1935

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1215 psia

1645 psia

Model Initialization

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Initialization Volumetrics

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OOIP 339.8 MMSTB (“known”) minus Np 119.6 MMSTB (known) equals OIP 220.2 MMSTB (inferred)

Initialization

February 2010 30

Adjust Drainage Pc

Oil Saturation – 1/1/2013

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Sorw < So < 1-Swirr

56.1%

42.1%

Pressure – 1/1/2013

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515 psia

970 psia

Well Locations

February 2010 33

Red – Imported Green-Interactively placed

Well Location on Structure

February 2010 34

10 acre well spacing

Injection Patterns

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Well Operating Constraints

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Well Operating Constraints

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Well Operating Constraints

Producers Minimum BHP - 1250 psia Maximum liquid rate - 200 STB/D

CO2 Injectors Maximum BHP - 2000 psia Maximum injection rate - 2000 MSCF/D

February 2010 38

Field Operating Constraints

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Submit Simulation

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Field Rate Performance – 5 yrs

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Initiate CO2 injection – 1/1/2013

Field Cumulative Performance – 5 yrs

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Field In-Place-Volumes – 5 yrs

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Side Well Performance – 5 yrs

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Oil response after 1 year for this well

Corner Well Performance – 5 yrs

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Oil response after 2.5 years for this well

CO2 Injector Performance – 5 yrs

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Injection Well Locations

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CO2 Injectors

Miscibility

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Full “Miscibility” after 7 months of injection

Pressure – 5 yrs

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1600 psia

1900 psia

Pressure – 1/1/2013

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515 psia

970 psia

Oil Saturation – 5 yrs

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Default Sorm 6%

Economic Parameters

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NPV Calculation

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Vertical Definition

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1 Layer

2 Layer

8000 STB/D

16,000 STB/D 12,500

STB/D

16,000 STB/D

2 hrs, 16 min

42 min

Vertical Definition

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2 Layer

4 Layer

12,500 STB/D

12,500 STB/D

16,000 STB/D

15,500 STB/D

2 hrs, 16 min

4 hrs, 58 min

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NITEC LLC

The End for now.