FAULT IDENTIFICATION AND REACTIVATION
Fault identification (source: TRE)
☒ Surface Motion
Faults, both natural and re-activated through reservoir depletion, can be identified and quantified by interpreting surface movement above a producing reservoir. Maps of surface movement are produced by processing SAR imagery with advanced interferometric techniques. Both historically acquired SAR datasets and actively tasked imagery can be processed to determine ground movement over an area of interest. Surface movement information is typically visualised using ground movement maps or in GIS systems.
By determining the characteristics of abrupt changes in the surface movement profile, faults can be identified, analysed and with advanced processing techniques, and subsequently their locations and movements quantified.
Surface movement is identified for the entire period of SAR acquisitions and displacement measurements are provided along the satellite’s line-of-sight. With the availability of both ascending and descending geometry SAR datasets, movement information is also provided along the vertical and horizontal directions.
Known restrictions / limitations
Lifecycle stage and demand
Geographic coverage and demand
Demand and coverage is globally onshore or on offshore platforms.
Input data sources
Radar: VHR2, HR1, HR2
Spatial resolution and coverage
Spatial resolution: 20x5 m / 3x3 m / 1x1 m pixel size
Coverage: 250x150 km / 100x100 km / 40x40 km / 30x50 km / 10x10 km
Minimum Mapping Unit (MMU)
Related to pixel size of satellite imagery used. One ground measurement point can be identified for each pixel in satellite image.
Accuracy / constraints
Thematic accuracy: Ground movement can be determined to millimetre accuracy (with a sufficient number of SAR images).
Spatial accuracy: In ideal conditions, one measurement point can be identified in each SAR image pixel.
Accuracy assessment approach & quality control measures
MonteCarlo statistical approach
Frequency / timeliness
Observation frequency: Constrained by satellite repeat cycle, typically 4-24 days. Historical satellite repeat cycle was up to 35 days. Appropriate satellites can be chosen in terms of spatial and temporal resolution.
Timeliness of delivery: Depends on the requirements of the Client and processing required.
Basic analysis can be performed quickly (24-48 hours) whilst integrated products require detailed analysis (2 weeks).
Delivery / output format
|Peer Reviewer:||Hatfield Consultants|
Fault identification and reactivation
# of Pages:
Internal – Project consortium and science partners
External – ESA
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