Abstract: A method for treating an oil shale formation comprising nahcolite includes providing a first fluid to a portion of the formation. A second fluid is produced from the portion. The second fluid includes at least some nahcolite dissolved in the first fluid. A controlled amount of oxidant is provided to the portion of the formation. Hydrocarbon fluids are produced from the formation.

Abstract: A system for heating a subsurface formation is described. The system includes a first elongated heater in a first opening in the formation. The first elongated heater includes an exposed metal section in a portion of the first opening. The portion is below a layer of the formation to be heated. The exposed metal section is exposed to the formation. A second elongated heater is in a second opening in the formation. The second opening connects to the first opening at or near the portion of the first opening below the layer to be heated. At least a portion of an exposed metal section of the second elongated heater is electrically coupled to at least a portion of the exposed metal section of the first elongated heater in the portion of the first opening below the layer to be heated.

Abstract: A oil shale formation may be treated using an in situ thermal process. A mixture of hydrocarbons, H2, and/or other formation fluids may be produced from the formation. Heat may be applied to the formation to raise a temperature of a portion of the formation to a pyrolysis temperature. Heat sources may be used to heat the formation. The heat sources may be positioned within the formation in a selected pattern.

Abstract: An in situ thermal desorption system may be used to remove contamination from soil. Off-gas removed from the soil may be transported from the soil to a treatment facility by high temperature hoses and plastic piping. The use of high temperature hose and plastic pipe may reduce the capital cost, installation cost, and operating cost as compared to conventional transport systems from thermal desorption soil remediation systems. The high temperature hose and plastic pipe are highly resistant to corrosion caused by the off-gas. The treatment facility may separate the off-gas into a liquid stream and a vapor stream. The liquid stream and the vapor stream may be processed to reduce contaminants within the liquid stream and vapor stream to acceptable levels.