Together oil and natural gas extraction comprise "97 per cent of Nigeria's foreign exchange revenues".

He appealed to the government to regulate sour gas extraction near the community, but the government did not respond.

Mining and natural gas extraction are also developed.

The quake is caused by natural gas extraction from the Slochteren field.

For the next 120 years, gas extraction mostly came from conventional reservoirs which did not require fracking.

In recent years, petroleum and natural gas extraction have become an important industry.

A typical gas extraction well is shown in figure 2.

The technology for off shore oil and gas extraction was introduced to Canada during these years.

It's also the area of one of the earliest industrial petroleum and gas extraction.

It also has oil rigs and natural gas extraction in the eastern plains.