DOI: 10.1016/j.jag.2017.07.002
Scopus记录号: 2-s2.0-85032183512
论文题名: Evaluation of thermal infrared hyperspectral imagery for the detection of onshore methane plumes: Significance for hydrocarbon exploration and monitoring
作者: Scafutto R ; D ; M ; , de Souza Filho C ; R ; , Riley D ; N ; , de Oliveira W ; J
刊名: International Journal of Applied Earth Observation and Geoinformation
ISSN: 15698432
出版年: 2018
卷: 64 起始页码: 311
结束页码: 325
语种: 英语
英文关键词: Gas leaks
; Hydrocarbon
; Hyperspectral imaging
; Methane
; SEBASS
; Seepages
; Thermal infrared
Scopus关键词: hydrocarbon exploration
; infrared imagery
; methane
; monitoring system
; sensor
; spatial resolution
; spectral analysis
英文摘要: Methane (CH4) is the main constituent of natural gas. Fugitive CH4 emissions partially stem from geological reservoirs (seepages) and leaks in pipelines and petroleum production plants. Airborne hyperspectral sensors with enough spectral and spatial resolution and high signal-to-noise ratio can potentially detect these emissions. Here, a field experiment performed with controlled release CH4 sources was conducted in the Rocky Mountain Oilfield Testing Center (RMOTC), Casper, WY (USA). These sources were configured to deliver diverse emission types (surface and subsurface) and rates (20–1450 scf/hr), simulating natural (seepages) and anthropogenic (pipeline) CH4 leaks. The Aerospace Corporation's SEBASS (Spatially-Enhanced Broadband Array Spectrograph System) sensor acquired hyperspectral thermal infrared data over the experimental site with 128 bands spanning the 7.6 μm–13.5 μm range. The data was acquired with a spatial resolution of 0.5 m at 1500 ft and 0.84 m at 2500 ft above ground level. Radiance images were pre-processed with an adaptation of the In-Scene Atmospheric Compensation algorithm and converted to emissivity through the Emissivity Normalization algorithm. The data was processed with a Matched Filter. Results allowed the separation between endmembers related to the spectral signature of CH4 from the background. Pixels containing CH4 signatures (absorption bands at 7.69 μm and 7.88 μm) were highlighted and the gas plumes mapped with high definition in the imagery. The dispersion of the mapped plumes is consistent with the wind direction measured independently during the experiment. Variations in the dimension of mapped gas plumes were proportional to the emission rate of each CH4 source. Spectral analysis of the signatures within the plumes shows that CH4 spectral absorption features are sharper and deeper in pixels located near the emitting source, revealing regions with higher gas density and assisting in locating CH4 sources in the field accurately. These results indicate that thermal infrared hyperspectral imaging can support the oil industry profusely, by revealing new petroleum plays through direct detection of gaseous hydrocarbon seepages, serving as tools to monitor leaks along pipelines and oil processing plants, while simultaneously refining estimates of CH4 emissions. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79890
Appears in Collections: 气候变化事实与影响
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作者单位: University of Campinas, UNICAMP, Institute of Geosciences, PO Box 6152, Campinas, SP, Brazil; The Aerospace Corporation, 14745 Lee Rd., Chantilly, VA, United States; PETRÓLEO BRASILEIRO S.A., Av. Henrique Valadares, 28-18th Floor, Rio de Janeiro, RJ, Brazil
Recommended Citation:
Scafutto R,D,M,et al. Evaluation of thermal infrared hyperspectral imagery for the detection of onshore methane plumes: Significance for hydrocarbon exploration and monitoring[J]. International Journal of Applied Earth Observation and Geoinformation,2018-01-01,64