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首页> 外文会议>2016 International Conference for Students on Applied Engineering >Selecting the most appropriate E O R: A case study of block Shen84-An12, Liaohe oilfield, north-east China
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Selecting the most appropriate E O R: A case study of block Shen84-An12, Liaohe oilfield, north-east China

机译：选择最合适的E O R：以中国东北辽河油田沉84-An12区块为例

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Given the high water cut (over 79%) situation in Shen84-An12 oil reservoirs, it has become more difficult to achieve further recoveries even with the most advanced technologies like polymer flooding. We would like to advocate for the use of steam flooding because of its track records with recovery schemes generally and heavy oil reservoirs in particular. Our approach is to study the circumstances that had led to the problems, prominent among them is the multi-layer nature of the reservoirs (at least 94 layers), heterogeneity, as well as their low depths. It was discovered, based on previous research, that reservoir formation damage has occurred as a result of excessive use of cold water and this combined with heavy nature of the oil lead to wax precipitation and the eventual of blocking of reservoir pore throat. Horizontal wells have the advantages of selectively targeting a desired zone so steam could be directed at certain targets such was the case of Du84 and other oil blocks in Liaohe oilfield. Another approach is to evacuate the water that has taken over most part of the reservoirs as a result of previous cold water flooding, based on sublimation principles. Applying both treatments intermittently by first eliminating water followed by the use of horizontal wells to target specific layers of interest, can enhance even better recovery but considering cost, either of the methods may be sufficient to salvage the situation. Although, we cannot guarantee the viability of the second method, instead, it is a mere suggestion based on scientific principle and the authors believe it should be experimented.
机译：鉴于Shen84-An12油藏的高含水率（超过79％）情况，即使采用聚合物驱等最先进的技术，也很难实现进一步的采收率。我们希望提倡使用蒸汽驱，因为蒸汽驱的历史记录通常带有回收方案，尤其是稠油藏。我们的方法是研究导致问题的环境，其中最突出的是储层的多层性质（至少94层），非均质性以及低深度。根据先前的研究发现，由于过度使用冷水而导致储层形成破坏，这与油的重质性质导致蜡沉淀并最终阻塞了储层孔喉。水平井的优点是可以有选择地对准目标区域，因此可以将蒸汽导向某些目标，例如辽河油田的Du84和其他油田。另一种方法是根据升华原理，排空由于先前的冷水洪水而淹没了大部分水库的水。通过先消除水，然后使用水平井使目标特定目标层断层断断续续地进行两种处理，可以提高采收率，但考虑到成本，这两种方法都足以挽救局面。尽管我们不能保证第二种方法的可行性，但它只是基于科学原理的建议，作者认为应该对此进行试验。

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