公开(公告)号：US4086964A

公开(公告)日：1978-05-02

申请号：US801271

申请日：1977-05-27

申请人： Richard E. Dilgren ,  George J. Hirasaki ,  Harold J. Hill ,  Derrill G. Whitten

发明人： Richard E. Dilgren ,  George J. Hirasaki ,  Harold J. Hill ,  Derrill G. Whitten

IPC分类号： C09K8/592 ,  E21B43/16 ,  E21B43/24

CPC分类号： E21B43/2406 ,  C09K8/592 ,  E21B43/16

摘要： In a viscous oil reservoir in which the stratification of the rock permeability is insufficient to confine steam within the most permeable strata, oil can be produced by forming and expanding a steam channel through which steam is flowed and oil is produced. Steam is injected and fluid is produced at rates causing a steam channel to be extended between locations that are horizontally separated. A foam-forming mixture of steam, noncondensable gas and surfactant is then injected into the steam channel to provide foam and a relatively high pressure gradient within the channel, without plugging the channel. A flow of steam-containing fluid through the steam channel is continued in a manner such that the magnitudes of the pressure gradient, the rate of oil production, and the rate of steam channel expansion exceed those which could be provided by steam alone.

摘要翻译： 在其中岩石渗透性分层不足以将蒸汽限制在最可渗透层内的粘性油储层中，可以通过形成和膨胀蒸汽通过其流动并产生油的蒸汽通道来产生油。 蒸汽被注入，流体产生的速率导致蒸汽通道在水平分离的位置之间延伸。 然后将蒸汽，不可冷凝气体和表面活性剂的泡沫形成混合物注入蒸汽通道中，以在通道内提供泡沫和相对高的压力梯度，而不堵塞通道。 通过蒸汽通道的含蒸汽流体的流动以这样的方式继续，使得压力梯度的大小，产油速率和蒸汽通道膨胀速率超过可以由单独提供的蒸汽通道膨胀。