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Aiding auto-ignition in tar sand formation

阅读:466发布:2022-04-21

专利汇可以提供Aiding auto-ignition in tar sand formation专利检索,专利查询,专利分析的服务。并且Control of in situ auto-ignition of heavy oil in a tar sand formation is achieved by insuring an amount of liquid water in the formation such that oxygen consumption is increased when air or oxygen is injected thereinto. Oxidation rate is increased and therefore the time required to reach auto-ignition is reduced. The method is applicable to operations such as in situ drive combustion. Water, hot water, or steam can be used. Both oil-wet and water-wet sands exhibit increased oxygen consumption over sands not containing a degree of water saturation. A water saturation of say 15 percent in a 45 percent porosity sand results in about a 2 1/2 times increase in O2 consumption over that of dry sand. With injected water, raising the total formation of water to about 20 percent, the temperature after 1,000 hours of air injection was 180* F. whereas without water injection the temperature of the dry sand was only 96* F. in an experiment applied to Asphalt Ridge tar sand.,下面是Aiding auto-ignition in tar sand formation专利的具体信息内容。

  • 2. A method according to claim 1 wherein the formation is a heavy tar-like oil containing sand and the oxygen bearing gas is air.
  • 3. A method according to claim 1 wherein a direct drive in situ combustion is initiated by auto-ignition by first providing the water in quantity sufficient to wet the sand.
  • 4. A method according to claim 1 wherein the water is first injected and then the oxygen bearing or oxidizing gas in injected.
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