physics

Geophysical Service

Geophysical Service is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Geophysical Service rather than just read about it. In short: Geophysical Service Inc. (often abbreviated GSI) was a Texas-based company founded by John Clarence Karcher and Eugene McDermott in 1930, for the purpose of using refraction and reflection seismology to explore for petroleum deposits.

Key takeaways

Geophysical Service belongs to physics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Geophysical Service to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Geophysical Service from memory before moving on to harder problems.

Reference excerpt

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

History On December 6, 1941, the company was purchased by Eugene McDermott, Cecil Howard Green, J. Erik Jonsson, and H.B. Peacock. During World War II, the company produced submarine detection devices. In 1951, the company was renamed Texas Instruments (TI) with GSI as a division. GSI was later sold by TI, repurchased, and finally sold again to Halliburton in 1988. Halliburton also acquired GeoSource, a competing geophysical contractor (formerly Petty-Ray Geophysical), and attempted to merge the two companies. However, the rivalry between the two entities endured and the merged entity known as Halliburton Geophysical Services (HGS) was not profitable. After several years of losses, in 1994, Halliburton sold HGS to Western Atlas (formerly Western Geophysical until its merger with Dresser Atlas in 1987). Western Atlas was bought by Baker Hughes in 1998 and then merged into WesternGeco in 2000 through a joint venture with Schlumberger in which Schlumberger held the majority share (70%). On July 3, 1981, MS Arctic Explorer, chartered to GSI to conduct seismic surveys off the Labrador coast for British Petroleum, sank off St. Anthony, Newfoundland, in the Strait of Belle Isle, resulting in the loss of 13 lives.

Present day operations In 1992, Davey Einarsson, a longtime executive of the original GSI, purchased the proprietary rights to GSI’s speculative data in the Canadian offshore, launching the new GSI in Calgary. Paul Einarsson is the COO and Chairman of Geophysical Service Incorporated. He joined the company in 1997. GSI is the largest owner of marine seismic data in Canada, with its head office located in Calgary, Alberta. In 2013, GSI was involved in several cases of litigation for damages over disclosure of its confidential seismic data. The court challenges included litigation with the Canada-Newfoundland Offshore Petroleum Board, the Canada-Nova Scotia Offshore Petroleum Board, and companies that had obtained GSI data from a third party or government.

See also List of oilfield service companies

References

External links Geophysical Service Inc.

Worked examples

Example 1 — a first encounter with Geophysical Service

Start with the simplest possible case. Write down what Geophysical Service claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Geophysical Service before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Geophysical Service ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Geophysical Service

In research: Geophysical Service appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Geophysical Service in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Geophysical Service is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1930 establishments in Texas, American companies established in 1930, Energy companies established in 1930, so understanding it makes those chapters shorter.
In everyday life: Look for Geophysical Service outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Geophysical Service in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Geophysical Service means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Geophysical Service out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Geophysical Service in simple terms?

Why does Geophysical Service matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Geophysical Service?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Geophysical Service.