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    • 29. 发明授权
    • In-situ retorting of oil shale
    • 油页岩的原位蒸馏
    • US4483398A
    • 1984-11-20
    • US457833
    • 1983-01-14
    • Greg G. PetersRobert C. West
    • Greg G. PetersRobert C. West
    • E21B43/247E21B43/30
    • E21B43/30E21B43/247
    • Fluid, such as liquid water, is injected into the rock surrounding an in situ oil shale retort at sufficient pressure and flow rate so that the injected fluid flows toward the retort to block the path of hot liquid and gaseous kerogen decomposition products escaping from the retort and to return heat to the retort. The successful conduct of an oil shale retorting operation usually requires that the retort temperature be maintained at a temperature sufficient to decompose efficiently the kerogen contained in the oil shale. By reducing the heat loss from an active retort, the amount of energy required to maintain a desired temperature therein is reduced. The fluid injection method also maintains pressure in an in-situ oil shale retort, allowing in-situ oil shale retorting to be efficiently conducted at a desired pressure. The method also reduces the danger to mineworkers who may be engaged in adjacent mining operations due to the escape of hazardous gases from an active retort. The method allows a series of sequential in-situ oil shale retorts in an oil shale formation to be placed more closely together than previously practical by reducing hot fluid leakage from each active retort to one or more abandoned retorts adjacent thereto, thus improving the recovery factor from the formation. The method also minimizes contamination of the formation surrounding an active in-situ retort due to hazardous chemicals which may be contained in the kerogen decomposition products leaking from the retort.
    • 诸如液体水的流体以足够的压力和流速被注入围绕原位油页岩蒸馏器的岩石中,使得注射的流体朝向蒸馏器流动,以阻止从蒸馏器中逸出的热液体和气体干酪根分解产物的路径 并将热量返回到蒸馏器中。 成功进行油页岩蒸煮操作通常需要将蒸煮温度保持在足以有效分解油页岩中所含的油母质的温度。 通过减少主动蒸馏器的热损失,可以减少维持所需温度所需的能量。 流体注入方法还在原位油页岩蒸馏器中保持压力,允许原位油页岩蒸馏在期望的压力下有效地进行。 该方法还降低了由于有源蒸馏器中有害气体逸出而可能从事相邻采矿作业的矿工的危险。 该方法允许油页岩地层中的一系列顺序的原位油页岩蒸馏器通过减少从每个主动蒸馏器向与其相邻的一个或多个废弃蒸馏器的热流体泄漏而更加紧密地放置在一起,从而改善回收系数 从形成。 该方法还可以最小化由于可能含在从蒸馏器泄漏的干酪根分解产物中的有害化学物质的活性原位蒸馏器周围的地层的污染。