--> CarbonSAFE Rocky Mountain Phase I : Seismic Characterization of the Navajo Reservoir, San Rafael Swell, Utah
[First Hit]

AAPG ACE 2018

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CarbonSAFE Rocky Mountain Previous HitPhaseNext Hit I : Previous HitSeismicNext Hit Characterization of the Navajo Reservoir, San Rafael Swell, Utah

Abstract

The CarbonSAFE Rocky Mountain team is a task force charged with investigating the regulatory, financial and technical feasibility of commercial-scale CO2 capture and storage from two coal-fired power plants in the northwest region of the San Rafael Swell, Utah. The long term objective is to develop a template of CCS implementation in the the Rocky Mountain region for subsequent, seamless CCS development. The reservoir injection interval is the Navajo Sandstone which is approximately 160 m thick and is at an average depth of about 2200 m below the surface. There is potential storage for up to 100,000 metric tonnes of CO2 per square mile. This reservoir meets the DOE’s requirement on carbon storage capacity and fulfills the initiative to develop protocols for commercially sequestering carbon sourced from coal-fired power plants.

A representative geologic model is a fundamental requirement for accurate assessment of storage potential and as the framework for simulation modeling of CO2 plume migration. Previous HitSeismicNext Hit data can greatly improve a geologic model by providing inter-well control on structure, stratigraphy, and reservoir petrophysical properties. While highly preferred, 3D Previous HitseismicNext Hit data is frequently unavailable for regional projects and early project Previous HitphaseNext Hit characterization studies such as the CarbonSAFE Rocky Mountain Previous HitPhaseNext Hit 1 study. Three “legacy” regional 2D Previous HitseismicNext Hit profiles obtained for this study were used to provide a sparse grid of structural and stratigraphic control for the sizeable regional geologic model. The age, quality, and sparsity of both Previous HitseismicNext Hit and well data posed challenges to interpretation tasks such as interpretation loop closure, Previous HitseismicNext Hit-to-well ties, and depth conversion. However, the Previous HitseismicNext Hit interpretation made significant contribution towards reduction of geologic uncertainty within the vast areas of otherwise unconstrained model space. This paper presents the methods used and challenges encountered during Previous HitseismicTop interpretation and conversion to depth domain for use in the geologic and simulation models.