It costs a great deal of money for exploration and production companies to search and drill for natural gas, and there is always the inherent risk that no natural gas will be found. Any number of factors in the underground environment – including the porosity of the rock and the viscosity of the deposit -- can impede the free flow of product into the well. The tremendous drop in natural gas price has transformed the energy sector. In wet natural gas, as much as 20% of the gas is made up of other alkanes, ethane, propane and the butanes. Crude oil is a liquid form of petroleum. Natural gas a very good interim solution until renewables bring their costs down into a competitive range. Petroleum companies extract crude oil from the Earth using a perforation in the Earth's surface called an oil well. Natural gas wells may be at depths from a couple of hundred feet to 25,000 ft deep, possibly even deeper. Some natural gas, as in Southern France, contains large amounts, up to 16%, of hydrogen sulphide, and others, as in the US, considerable amounts of helium . Extracting oil and natural gas from deposits deep underground isn’t as simple as just drilling and completing a well. Most natural gas is extracted by drilling into reservoirs in rocks deep in the earth. Shale gas has changed the economics of competing fuels, not only for coal and nuclear, but also renewables like solar, wind, and geothermal. How do we find natural gas? How are oil and gas extracted from under the sea bed? While natural gas is one way we can heat our homes, cook our food or even power some of our cars and buses, like all sources of energy, it has to come from somewhere. Like other deposits, they are extracted by drilling a hole down through the rocks into the oil or gas. In addition, wells provide natural gas. The types of rock that may contain natural gas include limestone, sandstone, shale, coal, and even fractured granite. Crude oil and natural gas occur in 'pockets' under the ground.Sometimes the deposits are found under the sea bed. Determining whether to drill a well depends on a variety of factors, including the economic potential of the hoped-for natural gas reservoir. They locate the types of geologic formations that are likely to contain natural gas … Here’s how natural gas drilling works. The search for natural gas begins with geologists who study the structure and processes of the earth.

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