Double-Difference Tomography for Sequestration MVA [monitoring, verification, and accounting]

doi:10.2172/1123885

GSTDTAP > 地球科学

DOI	10.2172/1123885
报告编号	None
来源ID	OSTI ID: 1123885
	Double-Difference Tomography for Sequestration MVA [monitoring, verification, and accounting]
	Westman, Erik
	2012-12-31
出版年	2012
语种	英语
国家	美国
领域	地球科学
英文摘要	Analysis of synthetic data was performed to determine the most cost-effective tomographic monitoring system for a geologic carbon sequestration injection site. Double-difference tomographic inversion was performed on 125 synthetic data sets: five stages of CO2 plume growth, five seismic event regions, and five geophone arrays. Each resulting velocity model was compared quantitatively to its respective synthetic velocity model to determine an accuracy value. The results were examined to determine a relationship between cost and accuracy in monitoring, verification, and accounting applications using double-difference tomography. The geophone arrays with widely-varying geophone locations, both laterally and vertically, performed best. Additionally, double difference seismic tomography was performed using travel time data from a carbon sequestration site at the Aneth oil field in southeast Utah as part of a Department of Energy initiative on monitoring, verification, and accounting (MVA) of sequestered CO2. A total of 1,211 seismic events were recorded from a borehole array consisting of 22 geophones. Artificial velocity models were created to determine the ease with which different CO2 plume locations and sizes can be detected. Most likely because of the poor geophone arrangement, a low velocity zone in the Desert Creek reservoir can only be detected when regions of test site containing the highest ray path coverage are considered. MVA accuracy and precision may be improved through the use of a receiver array that provides more comprehensive ray path coverage.
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来源平台	US Department of Energy (DOE)
引用统计
文献类型	科技报告
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/5647
专题	地球科学
推荐引用方式 GB/T 7714	Westman, Erik. Double-Difference Tomography for Sequestration MVA [monitoring, verification, and accounting],2012.