VI. Answer the questions

1. Why were the new methods for exploring the petroleum potential devised?

2. What are the three major exploration methods?

3. Is there an accurate way to predict the actual presence of under ground petroleum deposits?

4. What can the exploration methods do?

5. How can the natural gas concentration be detected?

6. What is the idea of surface method?

7. What do seismic methods involve?

8. What is the gravity meter and what is the idea of gravity meter surveys?

VII. Make up questions to the given answers

1. There are three major exploration methods.

2. A seepage of crude oil sometimes appears as a tarlike deposit in a low area.

3. The presence of underground salt domes may be indicated by a low bulge in an

otherwise flat ground surface.

4. Most folds and faults in subsurface rocks are not apparent at the ground surface.

5. Gravity surveys are usually carried from the air.

VIII. Make up a plan to the text.

IX. Retell the text paying attention to the main exploration methods.