Type
ArticleKAUST Department
Center for Subsurface Imaging and Fluid ModelingEarth Science and Engineering Program
Physical Science and Engineering (PSE) Division
Date
2017-02-03Online Publication Date
2017-02-03Print Publication Date
2017-05Permanent link to this record
http://hdl.handle.net/10754/622966
Metadata
Show full item recordAbstract
We present parsimonious refraction interferometry and tomography where a densely populated refraction data set can be obtained from two reciprocal and several infill shot gathers. The assumptions are that the refraction arrivals are head waves, and a pair of reciprocal shot gathers and several infill shot gathers are recorded over the line of interest. Refraction traveltimes from these shot gathers are picked and spawned into O(N2) virtual refraction traveltimes generated by N virtual sources, where N is the number of geophones in the 2D survey. The virtual traveltimes can be inverted to give the velocity tomogram. This enormous increase in the number of traveltime picks and associated rays, compared to the many fewer traveltimes from the reciprocal and infill shot gathers, allows for increased model resolution and a better condition number with the system of normal equations. A significant benefit is that the parsimonious survey and the associated traveltime picking is far less time consuming than that for a standard refraction survey with a dense distribution of sources.Citation
Hanafy S, Schuster GT (2017) Parsimonious Refraction Interferometry and Tomography. Geophysical Journal International. Available: http://dx.doi.org/10.1093/gji/ggx042.Publisher
Oxford University Press (OUP)Additional Links
https://academic.oup.com/gji/article/2968008/Parsimoniousae974a485f413a2113503eed53cd6c53
10.1093/gji/ggx042