Precise GPS/Acoustic positioning of seafloor reference points for tectonic studies

Spiess, Fred N.; Chadwell, C. D.; Hildebrand, John A.; Young, Larry; Purcell, G. H.; Dragert, H.

doi:10.1016/s0031-9201(98)00089-2

Cited by 213 publications

(169 citation statements)

References 19 publications

Supporting

Mentioning

166

Contrasting

Unclassified

Order By: Relevance

“…Also, it is possible to apply the arrival time methodology to pressure estimates obtained directly from time-lapse seismic data Lumley 1999, Landro 2001), by-passing the estimation of deformation entirely. In addition, developments such as side-scan-sonar interferometry (Chang et al 2000) and acoustic positioning (Spiess et al 1998), may provide useful data. An extension of this work would allow for permeability changes to accompany deformation.…”

Section: Discussionmentioning

confidence: 99%

Estimating permeability from quasi-static deformation: Temporal variations and arrival-time inversion

2008

View full text Add to dashboard Cite

Transient pressure variations within a reservoir can be treated as a propagating front and analyzed using an asymptotic formulation. From this perspective one can define a pressure 'arrival time' and formulate solutions along trajectories, in the manner of ray theory. We combine this methodology and a technique for mapping overburden deformation into reservoir volume change as a means to estimate reservoir flow properties, such as permeability. Given the entire 'travel time' or phase field, obtained from the deformation data, we can construct the trajectories directly, there-by linearizing the inverse problem. A numerical study indicates that, using this approach, we can infer large-scale variations in flow properties. In an application to Interferometric Synthetic Aperture (InSAR) observations associated with a CO 2 injection at the Krechba field, Algeria, we image pressure propagation to the northwest. An inversion for flow properties indicates a linear trend of high permeability.

show abstract

Section: Discussionmentioning

confidence: 99%

Estimating permeability from quasi-static deformation: Temporal variations and arrival-time inversion

2008

View full text Add to dashboard Cite

show abstract

“…Our analysis assumes that a set of deformation measurements have been gathered. The observations might consist of leveling data (Vasco et al 2000a), tilts (Castillo et al 1997, Wright 1998, Du et al 2005, InSAR range change observations (Massonnet and Feigl 1998, Burgmann et al 2000, Stancliffe and van der Kooij 2001, Global Positioning Satellite measurements (GPS) (Spiess et al 1998), time-lapse seismic time strains Bourne 2005, Rickett et al 2007), or accurate seafloor pressure observations (Sasagawa et al 2003).…”

Section: Estimating Volume and Pressure Changes Within The Reservoirmentioning

confidence: 99%

Reservoir monitoring and characterization using satellite geodetic data: Interferometric synthetic aperture radar observations from the Krechba field, Algeria

2008

View full text Add to dashboard Cite

Deformation in the material overlying an active reservoir is used to monitor pressure change at depth. A sequence of pressure field estimates, eleven in all, allow us to construct a measure of diffusive travel time throughout the reservoir. The dense distribution of travel time values means that we can construct an exactly linear inverse problem for reservoir flow properties. Application to Interferometric Synthetic Aperture Radar (In-SAR) data gathered over a CO 2 injection in Algeria reveals pressure propagation along two northwest trending corridors. An inversion of the travel times indicates the existence of two northwest-trending high permeability zones. The high permeability features trend in the same direction as the regional fault and fracture zones. Model parameter resolution estimates indicate that the features are well resolved.

show abstract

“…In order to detect seafloor movements with an accuracy of a few centimeters, GPS-acoustic combination technique has been developed (e.g., Spiess et al 1998;Asada and Yabuki, 2001). In Japan, our group first succeeded in detecting seafloor movements caused by interseismic plate convergence at the Japan Trench ) and has continued to monitor the movements including coseismic and postseismic deformation at the seafloor sites along the Japan Trench (e.g., Matsumoto et al 2006;Sato et al 2011a, b;Sato et al 2013b;Watanabe et al 2014) and the Nankai Trough (e.g., Yokota et al 2015).…”

Section: Methods and Observation Datamentioning

confidence: 99%

Non-volcanic crustal movements of the northernmost Philippine Sea plate detected by the GPS-acoustic seafloor positioning

2015

View full text Add to dashboard Cite

Repeatedly performing the GPS-acoustic seafloor positioning, we first succeeded in detecting non-volcanic seafloor movements on the Philippine Sea plate (PHS) subducting along the Sagami Trough. At a seafloor geodetic site on the northernmost part of the PHS off the Boso Peninsula, we detected significant eastward motion with respect to the central part of the PHS. This is unaccountable by the coupling between the Pacific plate and the PHS along the Izu-Bonin (Ogasawara) Trench because it would cause the westward elastic deformation at BOSS. It is rather consistent with the rigid motion of the tectonic block in the fore-arc along the Izu-Bonin Trench, associated with the back-arc rift. The other site on the western side of the Sagami Bay had moved toward the north relative to the Izu Peninsula. It suggests that the Izu microplate obviously moves relative to the northern PHS. The difference between the velocities of the Sagami Bay and the Izu Peninsula indicates the coupling on the boundary fault as well.

show abstract

Precise GPS/Acoustic positioning of seafloor reference points for tectonic studies

Cited by 213 publications

References 19 publications

Estimating permeability from quasi-static deformation: Temporal variations and arrival-time inversion

Estimating permeability from quasi-static deformation: Temporal variations and arrival-time inversion

Reservoir monitoring and characterization using satellite geodetic data: Interferometric synthetic aperture radar observations from the Krechba field, Algeria

Non-volcanic crustal movements of the northernmost Philippine Sea plate detected by the GPS-acoustic seafloor positioning

Contact Info

Product

Resources

About