摘要:
A heater is disclosed, the heater including: a porous metal sheet heating element; and an electrical insulating material surrounding the porous metal sheet heating element; wherein there is no casing surrounding the porous metal sheet heating element.
摘要:
A method is provided to remove volatile liquid contaminates from a contaminated volume of earth, the contaminated volume lying above a noncontaminated layer of earth, the method including the steps of: penetrating the contaminated volume with at least one wellbore so that a wellbore penetrates the contaminated volume and at least one wellbore penetrates the noncontaminated layer; applying heat from the wellbore within the noncontaminated layer to the noncontaminated layer until the temperature of a substantial portion of the noncontaminated layer that is contiguous with the contaminated layer is at least the boiling point temperature of contaminated liquids; and applying heat from the wellbore within the contaminated volume to the contaminated volume wherein the temperature of the contaminated volume rises to the boiling point of contaminated liquids after a substantial portion of the noncontaminated layer that is contiguous with the contaminated layer is about the boiling point of the contaminated liquids.
摘要:
Methods and systems of treating an oil shale formation using an in situ thermal process are described herein. A method of treating an oil shale formation in situ includes providing heat from one or more heat sources to at least a portion of the formation; allowing the heat to transfer from at least the portion to a selected section of the formation substantially by conduction of heat; pyrolyzing at least some hydrocarbons within the selected section of the formation; and producing a mixture from the formation.
摘要:
A heater is disclosed, the heater comprising: a heating element effective to generate radiant energy; a casing surrounding the heating element separated from the heating element; and support material between the casing and the heating element wherein the support material comprises a granular solid material that is translucent to radiant energy in the peak wavelength of energy which is radiated by the heating element at operating temperatures. The translucency of the support material is such that at least 50% of the radiant energy emitted by the heating element is radiated to the casing.
摘要:
A method is provided to remove contaminants from near-surface contaminated soil, the method including the steps of: placing a plurality of metal sheets on the surface above the contaminated soil to form a contiguous cover over at least a portion of the contaminated soil; seal welding adjacent metal sheets together; cutting a plurality of holes in the metal sheet; providing a plurality of heater wells and a plurality of vapor extraction wells into the contaminated soil through the holes cut in the metal sheets; providing vapor extraction wellheads over the vapor extraction wells, the vapor extraction wellheads sealed to the metal sheets; and removing contaminants from the near-surface soil by heating from the heater wells and extracting vapor through the vapor extraction wells. The wells are preferably both heater wells and vapor extraction wells, and the wellheads are preferably bolted to a flange which is welded to the metal sheets to ensure a positive seal at the surface. Insulation is preferably placed over the metal sheets prior to heating of the soil, and a rain cover placed over the insulation to keep rain out of the insulation and away from the soil being heated. The edges of the contiguous cover are preferably sealed by a vertical metal sheet placed into the soil, with a 90 degree angled lip on top, and the lip attached to the edge of the continuous sheet to form the seal.
摘要:
A method is provided to remove contaminants that are more dense than water from a contaminated volume of earth, the contaminants pooled above a layer of earth, the method comprising the steps of: providing an essentially horizontal wellbore along the interface between the layer of earth and the contaminants; heating at least a portion of the contaminants in situ from the wellbore; and removing the heated contaminants by heating through the horizontal wellbore. The wellbores preferably include both heaters and provide a conduit for removal of contaminants, and preferably also provide heaters located within the wellbores in addition to those heaters required to vaporize the contaminants to maintain the contaminants in a vapor state until the vapors reach a well head and can be further processed at the surface.
摘要:
A system for treating a subsurface formation includes a wellbore at least partially located in a hydrocarbon containing formation. The wellbore includes a substantially vertical portion and at least two substantially horizontal or inclined portions coupled to the vertical portion. A first conductor is at least partially positioned in a first of the two substantially horizontal or inclined portions of the wellbore. At least the first conductor includes electrically conductive material. A power supply electrically excites the electrically conductive materials of the first conductor such that current flows between the electrically conductive materials in the first conductor, through at least a portion of the formation, to a second conductor at least partially positioned in a second of the two substantially horizontal or inclined portions of the wellbore. The current resistively heats at least a portion of the formation between the two substantially horizontally oriented or inclined portions of the wellbore.
摘要:
An oil shale formation may be treated using an in situ thermal process. Heat may be applied to the formation to raise a temperature of a portion of the formation to a pyrolysis temperature. Heat input into the formation may be controlled to raise the temperature of portion at a selected rate during pyrolysis of hydrocarbons within the formation. A mixture of hydrocarbons, H2, and/or other formation fluids may be produced from the formation.
摘要:
A method for treating a nahcolite containing subsurface formation includes removing water from a saline zone in or near the formation. The removed water is heated using a steam and electricity cogeneration facility. The heated water is provided to the nahcolite containing formation. A fluid is produced from the nahcolite containing formation. The fluid includes at least some dissolved nahcolite. At least some of the fluid is provided to the saline zone.
摘要:
A method for treating a karsted formation containing heavy hydrocarbons and dolomite includes providing heat to at least part of one or more karsted layers in the formation from one or more heaters located in the karsted layers. A temperature in at least one of the karsted layers is allowed to reach a decomposition temperature of dolomite in the formation. The dolomite is allowed to decompose and at least some hydrocarbons are produced from at least one of the karsted layers of the formation.