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Control questions

1. What two properties are needed for a rock to be a reservoir
rock?
2. What are the two classifications of hydrocarbon traps?
3. In what kind of rocks is petroleum found?
4. What does porosity and permeability mean?
5. Which type of rock is likely to be more permeable, a
sandstone which is formed from sandy sediment or a shale
which is formed from muddy sediment?
6. With how many organic compounds crude oil consist of?
7. Which type of rock can includes oil?
8. From which types of wells natural gas comes?

ЗМ4. Construction of oil and gas wells

The concept of the well. Purpose and types of wells. Wells
classification according to the purpose and profile. Wells
construction, purpose of separate parts.
The concept of the well construction cycle. Methods of
drilling. Rock cutting tool. Downhole motors. Drill string. Mud
types.
Drilling of directional and multilateral wells. Horizontal
wells drilling. Features of deepwater drilling.
Fixing holes. Casing cementing. Downhole equipment.
Opening, completion and wells testing. [2-4].

Control questions

1. Why do wells sometimes blow out?
2. How is drilling mud used to prevent blowouts?
3. What is the purpose of the casing in the well?
4. Which is more expensive, drilling onshore or offshore?

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