The Drilling Process

Geophysics | Drilling

Drilling is an indispensible step in searching for natural gas storage sites and in hydrocarbon exploration.

The first step in creating underground natural gas storage sites or searching for hydrocarbons is research, or seeking out underground sites whose architecture contains favorable structures. In order to conduct research, drillholes (or wells) must be drilled.

Modern drilling techniques make it possible to deviate the drillhole from a specific point. Wells can be drilled simply at an angle or even be fully horizontal.

The benefit of horizontal wells is that they optimize the exchange surface between the well and the reservoir rock. Since the drainhole is much longer in the reservoir rock, horizontal wells can produce up to ten times more than vertical wells.


Intragaz gained expertise in horizontal drilling at its Saint-Flavien gas storage site, which was developed almost exclusively using horizontal wells with drains, totalling nearly 8 km.