Geophysics and Drilling

Geophysics and drilling are two essential elements in the development of new natural gas underground storage capacities.

Geophysics

Geophysics surveys the physical characteristics of underground structures and the whole earth using indirect measuring techniques such as gravimetry, geomagnetism, seismology, resistivity, seismic reflection, and seismic refraction.

The main geophysics technique used to find underground reservoirs for natural gas storage—and to conduct oil and gas exploration—is seismic reflection. This exploration method creates a visualization of deep underground geological structures by analyzing echoes of seismic waves.

The Drilling Process

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.

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