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![Page 1: Reservoir Modelling and Microseismicity at the Illinois ... · PDF filecomputed using ECLIPSE*300 industry-reference reservoir simulator. Pressure and RST* reservoir saturation tool](https://reader031.vdocuments.site/reader031/viewer/2022013006/5a9dfd807f8b9a29228c0b50/html5/thumbnails/1.jpg)
www.slb.com/carbonservices
Reservoir Modelling and Microseismicityat the Illinois Basin – Decatur Project
Bob Will
Sept. 19, 2017
CS1709-119-BW
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Outline
●Static and Dynamic Model Overview●Monitoring Data●Microseismicity and Plume Development●Potential Future Work:
―Elastic Modeling―Geomechanical Modeling
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Model Review
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Static Geologic Model
● High resolution static geologic model created by integration of 3D seismic data, geophysical logs, and core.
● Geologic structure and stratigraphy interpreted from 3D seismic data.
● Porosity distributed by co-simulation of well logs with inverted seismic impedance.
● Permeability distributed by co-simulation of well logs with porosity.
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• Static model ~30 miles x 30 miles • Horizontal grid resolution of 150 feet x 150 feet. • Vertical resolution in is variable, averaging 3.8 feet.• Static model had 906 million cells
(prior to cropping and scale-up for simulation).
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Reservoir (flow) Simulation Calibration Model
● Subset of geomodel grid.● Tartan grid with refinement centered on
the injection well.● ~550,000 cells with variable cell size from
refined to 75’ x 75’ near injection and monitoring wells.
● Extent and refinements designed for calibration and microseismic studies.
● Pressure and CO2 saturation distributions computed using ECLIPSE*300 industry-reference reservoir simulator.
● Pressure and RST* reservoir saturation tool calibration performed using MEPO* multiple realization optimizer Latin Hypercube and Evolution Strategy methods.
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Geomodel extent
Simulation model
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Reservoir (flow) Simulation Model Refinement
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Reservoir State Monitoring Data
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Pressure and RST Monitoring Wells
WB7
WB6WB5
WB4WB3WB2WB1
CCS1VW1
Inferred Baffle
Mt. Simon B
Upper Mt. Simon A
Mt. Simon C
Lower Mt. Simon A
Argenta
Top Pre-Cambrian
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Westbay Monitoring Pressures Suggest Vertical Isolation
WB1 - Shallow Pre Cambrian, WB2 & 3 – Lower MSA, WB4 & 5 – Upper MSA, WB6 - MSB
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Monitoring Pressure Change From Static
WB1 - Shallow Pre Cambrian, WB2 & 3 – Lower MSA, WB4 & 5 – Upper MSA, WB6 - MSB
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Repeat RST Logs
9/11 3/12 7/12 11/12 7/13 7/14 12/14 9/11 3/12 7/12 11/12 7/13 7/14 12/14 11/15
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RST Suggests Isolated Sand Intervals
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Time-lapse Seismic Attributes and Prior Monitor Plume Simulation at IBDP
Predictability
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NRMS NRMSimulated Monitor Plume
Simulated Monitor Plume
Simulated Monitor Plume
General consistency between multiple attributes.
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Pressure and RST Calibration (Evolution Strategy)CCS1 WB1
WB3 RST
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Microseismic Activity and Plume Development
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Saturation Plume and Average Pressure Contours March 2012
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Saturation Plume and Average Pressure Contours July 2012
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Saturation Plume and Average Pressure Contours November 2012
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Saturation Plume and Average Pressure Contours July 2013
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Saturation Plume and Average Pressure Contours July 2014
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Saturation Plume and Differential PressureJuly 2014
DP=P(t)-P(0)
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Relationship to Geologic Features
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Reservoir Elastic Modeling
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Simulation to Reservoir Elastic Property Modeling
Rock composition definitionfor matrix computations.
Injection well ELAN mineral fractions, porosity, density, and sonic logs.
Reservoir state data input dialog.Post-injection CO2 saturation (top) and
pressure (bottom).
Computed P-velocity difference cross-section.
Mt Simon A
Lower Mt Simon A
Argenta
Injection induced P-impedance difference.
Mt Simon A
Lower Mt Simon A
Argenta
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Geomechanical Modeling
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Finite Element Model – Stress Initialization
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Finite Element Model – Pressure Updates
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FEM Microseismic Forecasting - Locations
Event Frequency vs Time
Event Magnitude vs Time
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Microseismic Forecasting – Frequency and Magnitude
Event Frequency vs Time
Event Magnitude vs Time
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Thank You!
Questions?
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