Microseismic Monitoring at the Farnsworth CO2-EOR Field
Author:
Qin Yan1ORCID, Li Jiaxuan1ORCID, Huang Lianjie1ORCID, Gao Kai1, Li David1, Chen Ting1ORCID, Bratton Tom2ORCID, El-kaseeh George3, Ampomah William3, Ispirescu Titus3, Cather Martha3, Balch Robert3, Zheng Yingcai4ORCID, Tang Shuhang4, McCormack Kevin L.5ORCID, McPherson Brian5
Affiliation:
1. Los Alamos National Laboratory, Los Alamos, NM 87545, USA 2. Tom Bratton LLC, Littleton, CO 80127, USA 3. New Mexico Institute of Mining and Technology, Socorro, NM 87801, USA 4. Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX 77004, USA 5. Energy and Geoscience Institute, University of Utah, Salt Lake City, UT 84112, USA
Abstract
The Farnsworth Unit in northern Texas is a field site for studying geologic carbon storage during enhanced oil recovery (EOR) using CO2. Microseismic monitoring is essential for risk assessment by detecting fluid leakage and fractures. We analyzed borehole microseismic data acquired during CO2 injection and migration, including data denoising, event detection, event location, magnitude estimation, moment tensor inversion, and stress field inversion. We detected and located two shallow clusters, which occurred during increasing injection pressure. The two shallow clusters were also featured by large b values and tensile cracking moment tensors that are obtained based on a newly developed moment tensor inversion method using single-borehole data. The inverted stress fields at the two clusters showed large deviations from the regional stress field. The results provide evidence for microseismic responses to CO2/fluid injection and migration.
Funder
United States Department of Energy
Subject
Energy (miscellaneous),Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Electrical and Electronic Engineering,Control and Optimization,Engineering (miscellaneous),Building and Construction
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