Oil companies don't begin drilling in random ____ Geologists ____ many techniques ____ potential oil traps under the earth’s surface to help the company ____ the drilling activities, which maximizes profits. The discovery methods ____ for both onshore and offshore drilling.Methods of finding oil traps ____: Physical examination: ____ the physical characteristics of the area can help identify the conditions most likely ____ a trap. This was previously one of the primary methods, but geologists now have many other ways to assess the potential ____ modern technology. Aerial photos: In some cases, aerial photos ____ to help identify potential drilling areas. The photos can provide a different perspective to ____ light on the search for oil.Satellite images: A similar method uses satellite images of the land. Gravitational studies: The gravitational field ____ to change in areas above flowing oil. Geologists use magnetometers to ____ changes in the gravitational pull. The changes are often minor, but this method ____ finding new sources of oil. Scent detection: Electronic devices ____ sniffers can sometimes ____ the scent of hydrocarbons, which can indicate oil in the area.Seismology: When using seismic ____, geologists send shock waves down into the earth and interpret the ____ to assess the possibility of oil below the ground. These shock waves ____ to ensure safety for the surrounding ecosystem.

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