Geopressurized brines are hot (300°F to 400°F) (149°C to 204°C) pressurized waters that contain dissolved methane and lie at depths of 10,000 feet (3,048 meters) to more than 20,000 feet (6,096 meters) below the Earth's surface. The best known geopressured reservoirs lie along the Texas and Louisiana Gulf Coast. At least three types of energy could be obtained from these brines: thermal energy from high-temperature fluids; hydraulic energy from the high pressure; and chemical energy from burning the dissolved methane gas.