WesternGeco is a geophysical services company. It is headquartered in the Schlumberger House on the property of London Gatwick Airport in Crawley, West Sussex, in Greater London.

Owned by Schlumberger
IndustryEnergy Equipment and Services
Founded1933 (in 2000, company took on current name)
HeadquartersLondon Gatwick Airport
Crawley, West Sussex, UK
Key people
Maurice Nessim, President [1]
ProductsSeismic Data Acquisition for both land and marine, Data Processing and Electromagnetics
Schlumberger House, the head office of WesternGeco at London Gatwick Airport


The company provides reservoir imaging, monitoring, and development services. The company, a business segment of Schlumberger, offers 3D and time-lapse seismic surveys, electromagnetic surveys, and multicomponent surveys for delineating prospects and reservoir management. It also provides geophysical, land and transition-zone acquisition, marine acquisition, electromagnetics, and data processing and reservoir seismic services.

The company was formed by the merger in 2000 of two of the world's largest seismic contractors, Western Geophysical (founded in 1933)[2] and Geco-Prakla. Schlumberger, owners of Geco-Prakla paid cash to Baker Hughes, which then owned Western, for a 70% stake in a joint venture of the combined companies.[3] In May 2006, Schlumberger bought out Baker Hughes' 30% stake for a reported $2.4 billion, making WesternGeco one of its subsidiaries.[4][5]

Exit seismic acquisition

In January 2018, Schlumberger CEO Paal Kibsgaard announced that Schlumberger would be exiting the seismic acquisition business, both onshore and offshore, while retaining its multiclient data processing and interpretation segments. This decision followed the bankruptcy filings of several competitors in the seismic services sector.[6]

In August 2018, the seismic acquisition business was sold to Shearwater GeoServices.[7]

Head office

WesternGeco has its head office and its Europe/African offices in the Schlumberger House,[8][9][10] a 124,000 square feet (11,500 m2) building on the grounds of Gatwick Airport in Crawley, England,[8][11] in Greater London.[12]



WesternGeco offices in Westchase, Houston, Texas, United States


  1. ^ "Schlumberger Executive Management".
  2. ^ "Business Week".
  3. ^ Completed merger of the surface seismic data acquisition and data processing interests of Schlumberger Limited and Baker Hughes Incorporated Archived 2011-10-18 at the Wayback Machine, United Kingdom Office of Fair Trading, 2000-12-21.
  4. ^ Schlumberger Financial News, 2006-07-21
  5. ^ "2000s: Building on core strengths". Schlumberger. Retrieved March 18, 2011.
  6. ^ Addison, Velda (2018-01-19). "Schlumberger To Exit Land, Marine Seismic Acquisition Business". Exploration & Production. Retrieved 2018-02-23.
  7. ^ "Schlumberger Finds Buyer For WesternGeco Assets In $600 Million Deal".
  8. ^ a b "Regions Archived 2009-06-01 at the Wayback Machine." WesternGeco. Retrieved on 23 July 2009. "Corporate Headquarters" "Address: WesternGeco, Schlumberger House Buckingham Gate, Gatwick Airport West Sussex RH6 0NZ United Kingdom"
  9. ^ "Product line Archived 2011-06-15 at the Wayback Machine." WesternGeco. Retrieved on 12 February 2011. "Corporate Headquarters" "Address: Schlumberger House Buckingham Gate Gatwick Airport West Sussex, RH6 0NZ UK"
  10. ^ "Europe/Africa Archived 2011-07-18 at the Wayback Machine." WesternGeco. Retrieved on 26 December 2010. "Address: WesternGeco, Ltd. Schlumberger House Buckingham Gate, Gatwick Airport West Sussex, RH6 0NZ UK ."
  11. ^ Eade, Christine. "The market in minutes - Sussex." Property Week. 8 June 2007. Retrieved on 12 February 2011.
  12. ^ "Regions Archived 2009-06-01 at the Wayback Machine." WesternGeco. Retrieved on 23 July 2009. "WesternGeco is organized geographically, operating through a network of five regional offices around the world plus our headquarters in London, UK." and "Corporate Headquarters" "Address: WesternGeco, Schlumberger House Buckingham Gate, Gatwick Airport West Sussex RH6 0NZ United Kingdom"

External links

2017 term opinions of the Supreme Court of the United States

The 2017 term of the Supreme Court of the United States began October 2, 2017, and concluded September 30, 2018. The table below illustrates which opinion was filed by each justice in each case and which justices joined each opinion.

Baker Hughes

Baker Hughes, a GE company (BHGE) is an international industrial service company and one of the world's largest oil field services companies. As of December 2018 Baker Hughes is 50.4% owned by General Electric Company and 49.6% publicly traded (NYSE:BHGE). It operates in more than 120 countries, providing the oil and gas industry with products and services for oil drilling, formation evaluation, completion, production and reservoir consulting. Baker Hughes, a GE Company has its headquarters in the legacy BHI headquarters in Houston, Texas.

Controlled source electro-magnetic

The controlled source electromagnetic (CSEM) method is an offshore geophysical technique, employing electromagnetic remote-sensing technology to indicate the presence and extent of hydrocarbon below the seabed, but often noise perturbs the delineation and quantification.The CSEM survey uses a dipole source that is towed just above the seafloor to transmit a time-varying electromagnetic field into the earth. This field is modified by the presence of subsurface resistive layers and these changes are detected and logged by an array of receivers placed on the seabed. Because hydrocarbon-bearing formations are highly resistive compared with surrounding formations, a CSEM survey can indicate the presence of oil and gas in offshore situations.

Gatwick Airport

Gatwick Airport (), also known as London Gatwick (IATA: LGW, ICAO: EGKK), is a major international airport near Crawley in West Sussex, southeast England, 29.5 miles (47.5 km) south of Central London. It is the second-busiest airport by total passenger traffic in the United Kingdom, after Heathrow Airport. Gatwick is the ninth-busiest airport in Europe. It covers a total area of 674 hectares (1,670 acres).Gatwick opened as an aerodrome in the late 1920s; it has been in use for commercial flights since 1933. The airport has two terminals, the North Terminal and the South Terminal, which cover areas of 98,000 m2 (117,000 sq yd) and 160,000 m2 (190,000 sq yd) respectively. It operates as a single-runway airport, using a main runway with a length of 3,316 m (10,879 ft). A secondary runway is available but, due to its proximity to the main runway, can only be used if that is out of use. In 2018, 46.1 million passengers passed through the airport, a 1.1% increase compared with 2017. As of 2019, Gatwick is the second busiest airport in the world to operate only one runway (after Chhatrapati Shivaji Maharaj International Airport; until 2017, Gatwick was the busiest) with a passenger use of 46 million in 2018.

Geco (Geophysical Company of Norway)

Geco (Geophysical Company of Norway) was a European geophysical service company specializing in seismic surveys for petroleum exploration. Starting operating in the North Sea from 1972, the company expanded to operate in most marine areas open for explorations, until Geco was incorporated into Geco-Prakla, with Schlumberger Limited as the solely owner from 1993.

Geophysical Service

Geophysical Service Inc. (often abbreviated GSI) was founded by John Clarence Karcher and Eugene McDermott in 1930 for the purpose of using refraction and reflection seismology to explore for petroleum deposits.


Harpur is an electoral ward and area within the town of Bedford, England.

The boundaries of Harpur are approximately Manton Lane to the north, De Parys Avenue to the east, Bromham Road to the south, with the Midland Main Line railway line to the west.

Manton Heights, the Poets, the Prime Ministers, and the Black Tom neighbourhoods all lie within the boundaries of Harpur ward.

Henry Christoffersen

Henry Christoffersen is a shallow draft pusher tug built to operate on Canada's Mackenzie River. She was launched in 1973, and was the name ship of her class. She was designed by the Robert Allan Ltd. ship architects. She was built in Esquimalt, BC at a shipyard known as Burrard Yarrows.Like other pusher tugs, she has a tower, with a steering bridge, that rises high above her conventional bridge, to help navigate, when she is pushing a line of barges. She displaces 783 tons, and has a draft of just one metre.

Her four propellers are mounted in tubes. Each is powered by an 839-horsepower diesel engine.She has accommodations for thirteen crew members and five supernumaries or passengers.In addition to towing barges loaded with cargo the Henry Christoffersen gets chartered to support survey expeditions. In 2003 she towed ground penetrating sonar equipment throughout the Mackenzie Delta. In 2007-2008 she was part of a survey

of the Beaufort Sea, off Alaska.

List of United States Supreme Court cases, volume 585

This is a list of all the United States Supreme Court cases from volume 585 of the United States Reports:

Note: As of February 2019, final bound volumes for the U.S. Supreme Court's United States Reports have been published through volume 569. Newer cases from subsequent future volumes do not yet have official page numbers and typically use three underscores in place of the page number; e.g., Salman v. United States, 580 U.S. ___ (2016). In those cases, the docket number—usually two digits, a dash, and the 1-to-4 digit case number—is used instead; e.g. Salman v. United States, 15-628. If a case citation in a volume after 569 is shown with a page number, the page number is based on unofficial reporting and is subject to change when the decision is bound and printed.


Magnetotellurics (MT) is an electromagnetic geophysical method for inferring the earth's subsurface electrical conductivity from measurements of natural geomagnetic and geoelectric field variation at the Earth's surface. Investigation depth ranges from 300 m below ground by recording higher frequencies down to 10,000 m or deeper with long-period soundings. Proposed in Japan in the 1940s, and France and the USSR during the early 1950s, MT is now an international academic discipline and is used in exploration surveys around the world. Commercial uses include hydrocarbon (oil and gas) exploration, geothermal exploration, carbon sequestration, mining exploration, as well as hydrocarbon and groundwater monitoring. Research applications include experimentation to further develop the MT technique, long-period deep crustal exploration, deep mantle probing, and earthquake precursor prediction research.

RV Marcus Langseth

R/V Marcus Langseth is a research vessel owned by the National Science Foundation and operated by the Lamont-Doherty Earth Observatory (LDEO) of Columbia University as a part of the University-National Oceanographic Laboratory System (UNOLS) fleet.

The Marcus G. Langseth was dedicated on December 4 2007, came into service in early 2008, replacing the R/V Maurice Ewing.Langseth is intended primarily to collect multichannel seismic data, including 3-D surveys. The ship was purchased from the geophysical survey company WesternGeco in 2004, having previously been named M/V Western Legend.

The Marcus Langseth was named for Marcus G. Langseth, a Lamont scientist.

In March 2009 Chinese authorities denied the vessel permission to pass between Taiwan and China.In August 2009, Marcus Langseth was named in a Canadian lawsuit seeking to halt its seismic tomography experiment.

The lawsuit was dismissed, diplomatic clearance was issued and the ship sailed after a delay of a day.

Reflection seismology

Reflection seismology (or seismic reflection) is a method of exploration geophysics that uses the principles of seismology to estimate the properties of the Earth's subsurface from reflected seismic waves. The method requires a controlled seismic source of energy, such as dynamite or Tovex blast, a specialized air gun or a seismic vibrator, commonly known by the trademark name Vibroseis. Reflection seismology is similar to sonar and echolocation. This article is about surface seismic surveys; for vertical seismic profiles, see VSP.


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Westchase, Houston

For the community near Tampa, see Westchase, Florida.

Westchase is a business district and neighborhood in western Houston, Texas, bounded by Westheimer Road on the north, Gessner Road on the east, Houston Center Boulevard on the west, and Westpark Tollway on the south. The area is bisected by Beltway 8. Westchase is adjacent to Greater Sharpstown, the International District (which includes part of Chinatown), and the Royal Oaks Country Club subdivision. The area is immediately northeast of Alief.

A large portion of Westchase is covered by a special district, the Westchase Management District, which was created by the Texas Legislature in 1995. This entity, funded by a tax increment on businesses within its boundaries, provides branding, urban planning, and public safety functions for its constituents.More than 1,500 businesses reside in Westchase; several are associated with the petroleum industry, for which Houston is considered a major capital. Major employers that have offices in Westchase include ABB Group, BMC Software, Chevron, Phillips 66, Dow Chemical, Petrochina, and Jacobs Engineering. The Westchase district is approximately 4.32 square miles (11.2 km2) in size, with 16.3 million square feet (1,510,000 m2) of office space contained in 118 buildings.In 2006 Westchase was described by John Nova Lomax of the Houston Press as suburban in nature, with a high concentration of chain stores along its major arterial roads.

Western Atlas

Western Atlas was an oilfield services company formed in 1987 through the merger of Western Geophysical (owned by Litton Industries) and Dresser Atlas. The resulting company was a joint venture of Litton and Dresser Industries until it was spun off as a publicly traded company in 1994.

In 1998, Western Atlas was acquired by Baker Hughes. Western Atlas wireline division, Western Atlas Logging Services, became Baker Atlas, one of seven divisions of Baker Hughes. The Western Geophysical division of Western Atlas was joined with Schlumberger geophysical operations, Geco-Prakla, to form WesternGeco in 2000. WesternGeco was initially owned jointly by Baker Hughes and Schlumberger. In 2006 Schlumberger bought Baker Hughes' interest in WesternGeco.

This company went from Atlas Wireline to Western Atlas then to Baker Atlas.

Western Geophysical

Western Geophysical was a company founded in California in 1933 by Henry Salvatori for the purpose of using reflection seismology to explore for petroleum.

The company prospered and was sold by Salvatori to Litton Industries in 1960. In 1987, Litton and Dresser Industries formed a joint venture comprising Western and Dresser Atlas. The joint venture, Western Atlas, was spun off as a public company in 1994. Western then purchased Halliburton Geophysical Services, which had been formed from Geophysical Service Incorporated, Geosource and several other companies. In 1998, Western Atlas was acquired by Baker Hughes. In 2000, Western Geophysical became part of a joint venture between Baker Hughes and Schlumberger called WesternGeco and ceased to exist as a separate entity. In May 2006, Schlumberger bought Baker Hughes' 30% share of the company.

Western Geophysical built a number of significant seismic survey vessels over the years, in different classes depending on the role. The majority of Western Geophysical vessels were named for geographic features, such as:

Western Anchorage (200', West Coast and Alaska)

Western Cape (small, Gulf of Mexico)

Western Cay (small, Gulf of Mexico)

Western Glacier (200', West Coast and Alaska)More recent vessels including the Western Trident and Western Neptune passed to WesternGeco when the new company was formed.

The company was often referred to as "Westerns" and was affectionately known over many years by many of its employees as the "circus without a tent".

Dean Walling was the operating President of Western Geophysical for his entire working life and retired when the company was sold to Litton Industries in 1960.


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