Remember some facts about pendulums and gravimeters. Determine their common features and differences.

26. 9 Listen to the report on new equipment for geophysical survey. You will hear the text twice. For questions 1 – 10, choose the correct answer (A, B or C).

1.The company ARKEX is located in

(A) Houston, Texas

(B) Cambridge, England

(C) Houston and Cambridge

2.The core business of the company “ARKEX” is

(A) to prove production equipment

(B) to develop new methodology for geological survey

(C) to do geophysical survey

3.What is “BLUE QUBE”?

(A) a tool that images subsurface geology

(B) a system that makes seismic unnecessary

(C) a new tool that is mostly employed by subsurface engineers

4.“BLUE QUBE” is useful for

(A) observers

(B) shooters

(C) exploration managers

5.“BLUE QUBE” method includes

(A) a system that makes electromagnetics necessary

(B) gravity instrumentation and acquisition

(C) gravity gradient imaging, magnetics, video and radar

6.What is NOT true about “BLUE QUBE” measurements?

(A) it can help to survey large and deeply buried features in details

(B) it has higher signal-to noise ratio than other gravity systems

(C) it measures change of rock density

7.The disadvantage of 2D seismic is that

(A) it shows a vertical section into the ground

(B) it is not cost effective

(C) it gives no lateral coverage

8.In contrast with “BLUE QUBE” 3D seismic

(A) is more complex

(B) requires much more time

(C) does not destroy the ground

9.“BLUE QUBE” is airborne which:

(A) makes the survey expensive

(B) produces no impact on the environment

(C) does not give high resolution of measurements

10.Combining 2D seismic data with gravity gradient measurements helps

(A) to locate 3D seismic

(B) to win lease

(C) to determine the aspects of drilling process

27.9 Listen to the report on new satellite GOCE for measuring gravity field of the Earth and state if the sentences are true (T) or false (F).

1. The gravity gives us the sense of vertical and horizontal. __

2. The flattening of the Earth is due to variations

in the gravity field. __

3. Mountains, ocean trenches can affect the gravity. __

4. Large buildings can influence the gravity as well. __

5. The gravity field of the Earth can best be measured

by studying the composition of the planet. __

6. The trip of the satellite will continue for more

than two years. __

7. Torsion balance is the instrument which

will contribute to the success of the mission. __

8. The new satellite will fly in high orbit because

atmosphere in low orbits will cause challenges for its design. __

Using the diagram describe the general principle of gravity survey.

Discussion

Date: 2016-01-14; view: 844