Across
- 3. Formation where natural gas lies inside the Earth
- 5. Involves blasting fluid deep below earth's surface
- 6. How sand is put into rock formations to crack the rock
- 7. Gun that makes small holes in the casing of pipes
- 8. Impermeable rock formations that lock in oil and gas
Down
- 1. Things blasted into formations to crack rock
- 2. Technique used to enable extraction of natural gas
- 4. Begins with drilling of long vertical well