Abstract:
Methods and systems for stimulating light tight shale oil formations to recover hydrocarbons from the formations. One embodiment includes positioning a downhole burner in a first well, supplying a fuel, oxidizer, and water to the burner to form steam, injecting the steam and surplus oxygen into the shale reservoir to form a heated zone within the shale reservoir, wherein the surplus oxygen reacts with hydrocarbons in the reservoir to generate heat; wherein the heat from the reactions with the hydrocarbons and the steam increases permeability in a kerogen-rich portion of the shale reservoir, and producing hydrocarbons from the shale reservoir.
Abstract:
The present invention relates to a method of producing syngas from an underground coal deposit, comprising the steps of providing an injection well into the coal seam; providing a production well into the underground coal seam; providing a linkage bore in the coal seam running from the injection well to the production well; providing a laser into the linkage bore; heating the coal located in the linkage bore with the laser; producing syngas; and extracting the syngas through the production well.
Abstract:
This method and device are implemented in the energy industry and the underground gasification of fuel. The implementation thereof provides effective gasification process. The method for directing gases consists of using only one drilling for supplying an oxidizing gas and discharging the resulting gas and during the gasification the flow of the oxidising gas increases with the distance from the reaction zone which leads to increase in the linear speed of the oxidising gas and it reaches the reaction front which moved away. The device for implementing the method consists of a casing pipe (1) with pipeline (3) for an oxidizing gas that is mounted coaxially in the pipe and the casing pipe (1) is open in its bottom end with perforations in the walls. The lower part of the pipeline (3) contains a chamber (5) with at least one row of perforated openings (6).
Abstract:
Radio frequency radiation is introduced downhole to heat one or more components of an in-situ hydrocarbon mixture. The mixture is heated to a temperature conducive to auto-ignition. Upon heating, an oxidant is introduced at conditions supportive of auto-ignition. The combined oxidant / hydrocarbon mixture is then allowed to auto-ignite and combust to form a partially upgraded mixture. Certain embodiments include introducing an ignition agent to facilitate auto-ignition. The radio frequency radiation may be supplemented, continued, or varied as desired to maintain, facilitate, or manage the resulting combustion process. In some cases, an activator is introduced to the formation to interact with the generated radio frequency radiation to enhance hydrocarbon heating. Advantages of certain embodiments include lower cost, reduced heating/ignition equipment, higher efficiencies, increased hydrocarbon recovery, and fewer auto-ignition failures.
Abstract:
The present invention relates to a novel method of maintaining a steady and/or proper water-gas ratio for the wet in situ combustion process for oil recovery. In particular, the method comprises mixing water with a foaming agent, or some other colloid capable of generating foam, in addition to gas. The foam carries the water through heated reservoirs more efficiently and prevents separation from the gas. As such, more heat can be scavenged, thus an increased amount of steam is generated and transferred to the oil to increase its recovery.
Abstract:
A method for enhancing the recovery of hydrocarbon deposit includes the step of sensing a material property of an underground volume. A three-dimensional map identifying the spatial variation in the sensed material property of the underground volume is generated. Propagating electromagnetic radiation is transmitted in the volume based on the map. The propagating electromagnetic radiation transmission is varied in at least one of frequency, polarization, wavelength, frequency, amplitude, mode, and phase in response to the variation in the material property of a region within the volume to which the propagating electromagnetic radiation is directed. Accordingly, the volume is heated in a spatially varying manner to heat material in the volume and thereby induce the flow of hydrocarbon deposits from the volume.
Abstract:
A method of producing heavy oil from a heavy oil formation by combining electromagnetic heating to achieve fluid communication between wells, following by in situ combustion to mobilize and upgrade the heavy oil. Bitumen-colloquially known as "tar" due to its similar appearance, odor, and color-is a thick, sticky form of crude oil. It is so heavy and viscous that it will not flow unless either heated or diluted with lighter hydrocarbons.
Abstract:
A method for automatically shortening an injection well liner for underground coal gasification is provided. An apparatus is provided for performing underground coal gasification in a gasification cavity, the apparatus having an injection well with a casing and an injection well liner with an annulus in between. The injection well liner having one or more liner portions and one or more linkage portions between the one or more liner portions. Additionally, a point of injection of oxidation gasses is repositioned into the gasification cavity by breaking at least one of the one or more linkage portions of the injection well liner to shorten the injection well liner so that the oxidation gasses exit the shorted injection well liner.
Abstract:
A gas generator (10) has an elongate combustion housing (20) shaped to fit within a borehole for generating gasses for use in the recovery of petroleum products. The gas generator (10) includes a plurality of annular cooling jacket segments (70) that surround the elongate combustion housing (20), each of the segments (70) having an inlet port and an outlet port. Apertures (71) through the elongate combustion housing (20) allow water to flow from the segments (71) into the elongate combustion chamber (50). The invention further includes a method for cooling the gas generator (10) by controlling the flow of water into and out of each of the annular cooling jacket segments (70).