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首页> 外文会议>European Petroleum Conference 24-25 October 2000 Palais des Congres, Paris, France >Gas shut off using foam: The Solution for unwanted Gas Production?
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Gas shut off using foam: The Solution for unwanted Gas Production?

机译：使用泡沫切断气体：产生有害气体的解决方案？

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摘要

Gas shut off technology for wells with a high gas/oil ratio is extremely valuable to improve oil production and reduce environmental pollution. Foam treatments have been applied to reduce unwanted gas inflow. However, results have not always been favorable. This paper presents a field case supported by a modeling study of successful foam shut-off treatments carried out in the South Chinese Sea. This study shows that the possibility of success of gas- shut-off treatments can be greatly enhanced by having a good understanding of the pr0ocess parameters. In the Champion field, Brunei, an increasing number of oil wells are shut in due to high gas/oil ratio. In Novemeber 1998, three wells were treated with a surfactant /polymer (foam) solution in water, co-injected with nitrogen. In two wells the gas/oil productivity was observed, which partly restored in the course of time. The treatments were based on laboratory core flow experiments the field trials and as input data for simulations with a numerical radial well model, whihc was used to interpret the field trials. The reduction in gas mobility by a factor between 2 and 10 as observed in the field is consistent with the results of the laboratory experients.
机译：高气/油比井的瓦斯关闭技术对于提高石油产量和减少环境污染非常有价值。已经采用泡沫处理以减少不希望的气体流入。但是，结果并不总是令人满意的。本文介绍了在南中国海进行的成功的泡沫切断处理的建模研究所支持的现场案例。这项研究表明，通过对过程参数有很好的了解，可以极大地提高成功实施天然气切断处理的可能性。在汶莱的冠军油田，由于高的油气比，关闭了越来越多的油井。在1998年Novemeber，三个井分别用表面活性剂/聚合物（泡沫）在水中的溶液和氮气共同注入进行了处理。在两口井中，观察到气/油生产率，随着时间的流逝，其部分恢复。这些处理是基于实验室岩心流动实验和现场试验，并作为使用数值放射状井模型进行模拟的输入数据，用于解释现场试验。现场观察到的气体迁移率降低了2到10倍，这与实验室经验的结果是一致的。

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