METHODS FOR IMPROVING THE SWEEP EFFICIENCY OF GAS INJECTION
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    发明申请
    METHODS FOR IMPROVING THE SWEEP EFFICIENCY OF GAS INJECTION 审中-公开
    改善气体注入效率的方法

    公开(公告)号:US20140262255A1

    公开(公告)日:2014-09-18

    申请号:US14167892

    申请日:2014-01-29

    IPC分类号: E21B43/16

    摘要: A method for recovering oil from a subterranean, hydrocarbon-bearing formation includes at least one injection well and injecting a carrier fluid including a diverting agent into a high permeability pathway within the formation. An activating fluid is injected into the high permeability pathway within the formation, resulting in the precipitation or swelling of the diverting agent. The permeability of the high permeability pathway is decreased within the formation containing the diverting agent to a permeability less than the permeability of the adjacent areas of the formation. The carrier fluid may have a predetermined residence time within the formation prior to injecting an activating fluid; the step of injecting a carrier fluid comprising a diverting agent and injecting an activating fluid may be repeated. A mineralization fluid may be injected that is oversaturated or becomes oversaturated upon interacting with the acid gas that causes mineral precipitation to seal off high-permeability pathways.

    摘要翻译: 从地下含烃地层中回收油的方法包括至少一个注入井,并将包含转移剂的载体流体注入地层内的高渗透性路径。 激活流体被注入到地层内的高渗透性通路中,导致转移剂的沉淀或溶胀。 在含有转向剂的地层中,高渗透性通道的渗透性降低到渗透率小于地层相邻区域的渗透率。 载体流体可以在注入活化流体之前在地层内具有预定的停留时间; 可以重复注入包含转移剂并注射活化流体的载体流体的步骤。 可以注入矿化流体,其过饱和或与酸性气体相互作用而变得过饱和,导致矿物沉淀以密封高渗透性通路。