Assessing the Cypress Sandstone for Carbon Dioxide-Enhanced Oil Recovery and Carbon Storage: Part II—Leveraging Geologic Characterization to Develop a Representative Geocellular Model for Noble Oil Field, Western Richland County, Illinois

Grigsby, Nathan P.; Webb, Nathan D.

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https://hdl.handle.net/2142/107788 Copy

Description

Title

Assessing the Cypress Sandstone for Carbon Dioxide-Enhanced Oil Recovery and Carbon Storage: Part II—Leveraging Geologic Characterization to Develop a Representative Geocellular Model for Noble Oil Field, Western Richland County, Illinois

Author(s)

• Grigsby, Nathan P.
• Webb, Nathan D.

Issue Date

2020

Keyword(s)

• Carbon dioxide
• Carbon storage
• Enhanced oil recovery
• Geologic carbon sequestration
• Sandstone

Date of Ingest

2020-07-23T13:32:47Z

Geographic Coverage

Richland County, Illinois

Abstract

This research aims to leverage the geologic characterization by Webb and Grigsby (2020) to develop a geocellular model of the Cypress Sandstone at Noble Field in Richland County, Illinois. This model will be used to test hypothetical carbon dioxide-enhanced oil recovery (CO2-EOR) simulations to determine if the reservoir and its underlying residual oil zone (ROZ) could add to incremental oil production at the field. Geologic characterization played a key role in model development. It was necessary to clearly delineate the contact between the thick fluvial sandstone interval and the overlying shaley estuarine interval so that a geostatistical analysis could detect the anisotropy and transitional behavior within each element. Additionally, a new understanding of the sedimentology and depositional environment provided context for inferring interwell characteristics or small-scale features that could have a substantial impact on fluid flow without producing a strong signal on geophysical logs. Spontaneous potential (SP) logs were used to detect a strong northwest–southeast-trending anisotropy and condition simulations to model the distribution of sandstone and shale. Too few neutron-density porosity logs were available to characterize the field-wide lateral anisotropy in sandstone and shale, but geostatistical analysis did indicate two parallel layers of calcite cement, one at the oil–water contact and one about 9 ft (3.3 m) below it. Combining the model based on SP logs and the model based on neutron-density porosity logs resulted in a model that properly represented the distribution of depositional (sandstone and shale) and digenetic (calcite cement) geologic features that control fluid flow.

Publisher

Champaign, Ill.: Illinois State Geological Survey, Prairie Research Institute.

Series/Report Name or Number

Circular no. 602

Type of Resource

text

Genre of Resource

technical report

Language

en

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http://hdl.handle.net/2142/107788

Sponsor(s)/Grant Number(s)

U.S. Department of Energy contract number DE-FE0024431

Copyright and License Information

Copyright 2020 University of Illinois Board of Trustees

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