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DEPRESSURIZING OIL RESERVOIRS FOR SAGD

机译:降低SAGD储油量

摘要

A proposed methodology to startup wells with electrical downhole heating as apreconditioning method for a steaminjection process. The downhole electrical heating recovers oil which resultsin a reduction in the reservoir pressure. Once oil has beenrecovered for a period of time and the operating pressure and temperature hasbeen reduced, SAGD well pairs are provided betweenthe downhole heater wells, and SAGD or a SAGD- like method used to produceoil. The method reduces heat losses due to steaminjection at lower pressure and temperature and therefore, improves efficiencyand lowers operating costs. Operating at lower pressureand temperature will also reduce the risk of melting the permafrost andconsequent well failure issues. When oil production drops belowan economical level, remaining oil can be collected at the DHH wells using theSAGD wellpair for gas or solvent or steam sweeps,or combinations thereof.
机译:一种提议的方法,以井下电加热作为启动油井的方法蒸汽的预处理方法注射过程。井下电加热回收油,从而产生降低油藏压力。一旦油被恢复一段时间后,工作压力和温度达到减少了SAGD井对之间井下加热器井,并使用SAGD或类似SAGD的方法生产油。该方法减少了由于蒸汽引起的热损失在较低的压力和温度下进样,因此提高了效率并降低运营成本。在较低压力下运行温度还可以降低永久冻土融化的风险,随之而来的油井故障问题。当石油产量下降到从经济角度来看,可以使用以下方法在DHH井中收集剩余的油:SAGD井对,用于气体或溶剂或蒸汽吹扫,或其组合。

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