sea$oil$field$satellite$monitoring:$$ an$opera3onal$view!! · 7/21/2011 · niger!deltaprovince!...
TRANSCRIPT
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Sea Oil Field Satellite Monitoring: An Opera3onal View
Maurizio Migliaccio Università di Napoli Parthenope
NOAA, World Weather Building Room 707, 5200 Auth Road, Camp Springs, MD 20746
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Outline Introduc:on
Sea oil fields
Synthe:c Aperture Radar
SAR sea oil field monitoring
Conclusions
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Introduc:on Petroleum or crude oil is a naturally occurring, toxic, flammable liquid consis:ng of a complex mixture of hydrocarbons of various molecular weights, and other organic compounds, that are found in geologic forma:ons beneath the Earth's surface.
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Introduc:on Petroleum is recovered mostly through oil drilling. It is refined and separated, most easily by boiling point, into a large number of consumer products, from gasoline and kerosene to asphalt and chemicals used to make plas:cs and pharmaceu:cals.
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Introduc:on
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Introduc:on
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Oil reserves
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Sea oil transporta:on
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Kashagan Field Kashagan Field is an oil field located in Kazakhstan. The field is situated in the northern part of the Caspian Sea close to the Kazakhstan city of Atyrau. The field was discovered in 2000 and was one of the larger discoveries in that decade, it is es:mated that the Kashagan Field has commercial reserves from 9 billion barrels (1.4×109 m3) to 16 billion barrels (2.5×109 m3) of oil.
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Kashagan Field
Isola A -‐ ENI Isola D -‐ ENI
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North sea oil field In the oil industry, the term "North Sea" o`en includes areas such as the Norwegian Sea and the UK "Atlan:c Margin" (west of Shetland) that are not geographically part of the North Sea.
The Bri:sh and Norwegian sec:ons hold most of the remainder of the large oil reserves. It is es:mated that the Norwegian sec:on alone contains 54% of the sea's oil reserves and 45% of its gas reserves.
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North sea oil field For Norway, the Norwegian Petroleum
Directorate gives a figure of 4,601 million cubic metres of oil(corresponding to 29 billion barrels) for the Norwegian North Sea alone (excluding smaller reserves in Norwegian Sea and Barents Sea) ul:mate of which 2,778 cubic metres (60%) has already been produced prior to January 2007.
Exact figures are debatable, because methods of es:ma:ng reserves vary and it is o`en difficult to forecast future discoveries.
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North sea oil field
Ekofisk The Brent oil field in the North Sea, north west of Shetland
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Niger Delta province The Niger Delta province is a geologic province in the Niger Delta of West Africa also known as the Niger Delta Basin. The province contains one petroleum system, the "Ter:ary Niger Delta (Akata-‐Agbada) Petroleum System" (classified as number 701901), the majority of which lies within the borders of Nigeria, with suspected or proven access to Cameroon, Equatorial Guinea and São Tomé and Príncipe.
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Niger Delta province This petroleum system contains as
much as 5.5 109m³ (34.5 billion barrels) of recoverable oil and 2.7 109m³ (94 trillion cubic feet) of natural gas at the origin. This field is not a single gigan:c field but composed of thousands of individual reservoirs, most of which are sandstone pockets, trapped within oil-‐rich shale strata.
The total produc:on of the Akata-‐Agbada system is about 320,000 m³ (2 million barrels) per day.
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Niger Delta province
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Maracaibo The Maracaibo Basin in Western Venezuela is a prolific, oil-‐producing sedimentary basin. The basin is bounded on the north by the Oca Fault which separates it from the Caribbean Sea.
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Maracaibo
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Arc:c oil field
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The pris:ne waters off Greenland are targets for a new oil and gas drive
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Arc:c oil field According to the US Geological Survey, almost a quarter of the world's undiscovered but poten:ally exploitable oil and gas reserves may lie beneath the Arc:c seabed.
Basic science tells you that in colder water, oil products are going to remain intact for much longer before being broken down. Rescue and clean-‐up opera:ons will be more difficult in the roiling Arc:c than in the rela:ve calm of the Gulf.
The most important governments involved in the new Arc:c oil race are Canada, Russia and the US.
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Gulf of Mexico The Gulf of Mexico is a par:ally landlocked ocean basin largely surrounded by the North American con:nent and the island of Cuba.
At its deepest it is 14,383 ` (4,384 m) at the Sigsbee Deep, an irregular trough more than 300 nau:cal miles (550 km) long. The basin contains a volume of roughly 660 quadrillion gallons (2.5 × 1015 m3).
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Gulf of Mexico One of the largest worldwide sea oil field is in the Gulf of Mexico which can be split into three US areas: the Western Gulf, the Central Gulf and the Eastern Gulf.
The Central Gulf is the most relevant sea oil field area with 30.3 oil es:mated billion of barrels and with 5,001 leases.
The total number of ac:ve offshore leases in the Gulf of Mexico is 6,918 and now accounts for 30% of US produc:on with half of that coming from deep water (>300 m and <1500 m) and a third from ultradeep water (>1500 m).
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Gulf of Mexico
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Gulf of Mexico
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Deepwater Horizon The site of the Transocean Deepwater Horizon was in the Macondo well in the Central Gulf area about 80 km off the Louisiana coast.
Close enough to the coast and to a coastal area of paramount economical and environmental interest.
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Deepwater Horizon On 20 April 2010, a fire broke on the Transocean Deepwater Horizon oil rig under lease by BP (Bri:sh Petroleum), with 126 people on board. A`er a big explosion, all but 11 of the crew managed to escape as the rig was burnt by fire.
On 22 April 2010, the rig sank. Safeguards set in place to automa:cally cap the oil well in case of catastrophe did not work as expected. According to a first conserva:ve MMS (Minerals Management Service) formula the BP es:mated at worst a spill of 162,000 barrels per day and a standard technology recovery capacity of about 500,000 barrels per day. Only a`er 12 weeks the BP succeeded in placing a :ght cap on the well.
A first es:mate of about 5 million barrels already makes this accident as the world's largest accidental oil spill. It is surpassed only by the inten:onal 1991 Gulf war spill in Kuwait.
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Deepwater Horizon
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SAR The Synthe:c Aperture Radar (SAR) is an ac:ve coherent band-‐limited microwave imaging sensor that works exploi:ng different mechanisms to form the azimuth and the range dimensions of the image.
SAR can efficiently work day-‐and-‐night and almost independently from atmospheric condi:ons.
Due to its nature SAR images are affected by speckle that can be reduced at expense of spa:al resolu:on.
Enhanced SAR sea oil slick observa:on it has been developed by appropriate physical modelling and use of fully-‐polarimetric and dual-‐polarimetric measurements.
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SAR
ASAR RadarSAT-‐1
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SAR
CosmoSkyMed TerraSAR-‐X
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SAR
PALSAR RadarSAT-‐2
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SAR oil field monitoring
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CosmoSkyMed SAR data – Maracaibo, Venezuela
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SAR oil field monitoring A large emphasis is o`en posed on data since it is said that satellite data are low cost and support services. Too o`en is neglected the key fact that in SAR images, conversely to op:cal ones, data interpreta:on is not always straighuorward.
Larger data availability per se does not ensure an enhancement of the service since added value products genera:on are o`en based on ad hoc procedures that strongly rely on the operator exper:se.
Semi-‐automa:c image-‐based procedures are typically adapted to the sensor.
Automa:c and reliable procedures – able to take benefit of all SAR data -‐ are necessary for an effec:ve opera:onal service.
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Physical vs Image processing ‘The important thing in science is not so much to obtain new facts as to discover new ways of thinking about them.’
— William Bragg
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Oil single-‐pol
SIR-‐C SIR-‐C
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Oil single-‐pol
PalSAR PalSAR
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Target single-‐pol
PalSAR input PalSAR output
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Target single-‐pol
CosmoSkyMed input CosmoSkyMed output
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Target single-‐pol Based on the same physical ra:onale one can develop an appropiately tailored filter related to the cross-‐pol channel.
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Target single-‐pol
PalSAR input PalSAR output
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Target single-‐pol
CosmoSkyMed input CosmoSkyMed output
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Oil dual-‐pol
SIR-‐C input SIR-‐C output
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Oil dual-‐pol ;)
SIR-‐C input SIR-‐C output
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Oil dual-‐pol
PALSAR input PALSAR output
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Oil dual-‐pol
PALSAR input PALSAR output
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Oil dual-‐pol ;)
RadarSAT-‐2 input RadarSAT-‐2 output
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Physical vs Image processing
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Oil full-‐pol
PalSAR l_band entropy
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Oil full-‐pol
PalSAR l_band entropy
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Oil full-‐pol
PalSAR l_band Mueller
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Oil full-‐pol
PalSAR l_band Mueller
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Oil full-‐pol
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Oil full-‐pol
UAVSAR pedestal
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Oil & Target full-‐pol
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Oil & Target full-‐pol
PalSAR oil
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Oil & Target full-‐pol
PalSAR target
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Oil & Target full-‐pol
RadarSAT-‐2 oil
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Oil & Target full-‐pol
RadarSAT-‐2 target
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Conclusions An opera:onal service for sea oil field monitoring can be effec:vely conceived by exploi:ng a SAR constella:on of constella:ons, i.e. a virtual (but real !) constella:on.
Physical-‐processing is robust respect to change of SAR frequency.
Full-‐pol procedures do not require an external threshold.
Procedures are very fast and effec:ve.
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