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首页> 外文会议>SPE Heavy Oil Conference Canada >Characterization of Early Steam Breakthrough and Treatment Technology in Shallow Thin Layer Ultra Heavy Oil Reservoir with Horizontal Well Steam Drive
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Characterization of Early Steam Breakthrough and Treatment Technology in Shallow Thin Layer Ultra Heavy Oil Reservoir with Horizontal Well Steam Drive

机译：水平井蒸汽驱动浅层薄层超重油储层早期蒸汽突破和治疗技术的特征

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摘要

Thermal recovery technology is an effective and popular EOR method for the development of heavy oil reservoirs. Following puff and huff, steam drive is usually conducted to further improve recovery rate by heating more oil. Pai-601 block in Chunfeng oilfield is a typical shallow, thin layers ultra heavy oil reservoir of which oil viscosity is over 50000mPa·s on the surface and layer thickness is usually ranging from 4 to 10m. For its high viscosity and thin layers, traditional thermal recovery technology with straight well is invalid. So, horizontal well steam drive is applied in this block. According to field test, steam breakthrough takes place frequently, which makes steam injected circulate ineffectively. With the purpose of understanding the characteristics of steam breakthrough, searching ways for its controlling and improving the development of the reservoir, the study is carried out by taking pai-601 block as an example. The HDNS technique (horizontal well, nitrogen and viscosity reducer assisted steam huff and puff technology) is introduced, which is firstly applied in Pai601 block during the huff and puff process. Parameters that can indicate the emergency of steam breakthrough are selected and its determining standard is proposed and the variation of breakthrough channel is analyzed. In addition, the high-tempture gel is put into use for the steam breakthrough controlling, and the results show that it is efficient for improving the oil rate and decreasing the content of steam breakthrough. The time for profile control is also studied and it’s better to take the measures into action at the initial stage of steam breakthrough, which will provide a useful guidance for the development of reservoir with heavy oil and thin thickness.
机译：热回收技术是一种有效且流行的重型油藏的EOR方法。在粉扑和沟槽之后，通常进行蒸汽驱动以通过加热更多的油来进一步提高回收率。 Chunfeng油田的PAI-601块是典型的浅层，薄层超重油贮存器，其中油粘度超过50000mpa·s，表面厚度通常为4至10m。对于其高粘度和薄层，传统的热恢复技术直观，无效。因此，在该块中施加水平井蒸汽驱动器。根据现场测试，经常发生蒸汽突破，这使得蒸汽注入无效地循环。目的是理解蒸汽突破的特点，通过以PAI-601块作为示例进行研究来搜索其控制和改善水库的发展。引入了HDNS技术（水平孔，氮气和粘度减速器辅助蒸汽Huff和Puff技术），其在沟槽和泡芙过程中首先应用于PAI601块。选择可以指示蒸汽突破的紧急情况的参数，并提出了其确定标准，并分析了突破通道的变化。此外，高试剂凝胶用于蒸汽突破性控制，结果表明，提高油速度和降低蒸汽突破的含量是有效的。还研究了型材控制的时间，并且最好在蒸汽突破的初始阶段采取措施，这将为具有重油和薄厚度的储层的开发提供有用的指导。

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