石油与天然气地质 ›› 2010, Vol. 31 ›› Issue (4): 504-410.doi: 10.11743/ogg20100416

• 石油与天然气地质 • 上一篇    下一篇

苏北盆地草舍油田泰州组储层水敏伤害及其对注水开发的影响

  

  1. 中国石油化工股份有限公司华东分公司规划设计研究院，江苏扬州225007
  • 出版日期:2010-08-28 发布日期:2010-10-20
  • 作者简介:章雄冬（1979—），男，硕士研究生，储层地质及微观渗流。

Water-sensitive damage and its impacts on the water flood development of the Taizhou Formation reserviors in Caoshe oilfield，the Subei Basin

  • Online:2010-08-28 Published:2010-10-20

PDF (PC)

805

被引次数

22

摘要：

运用真实砂岩微观模型实验技术，对苏北盆地草舍油田泰州组储集砂岩进行了浸泡型水敏性实验。结果显示，该砂岩具中等水敏。为充分了解水敏伤害对注水开发的影响，开展了真实砂岩微观模型水驱油实验，包括单模型及组合模型两种实验类型，分别模拟微观及宏观水驱油，并比较了水敏伤害前、后水驱油特征的变化。结果表明，水敏伤害没有改变水驱油方式及残余油形态，但单模型的绕流现象整体增强，驱油效率降低，主要受注水压力、注水位置及微观非均质性等因素影响;而组合模型的采收率整体呈下降趋势，受微观非均质性及宏观非均质性共同控制。为避免水敏伤害对注水开发的影响，建议注入水矿化度为11.99g/L左右。

关键词: 驱油效率, 水敏伤害, 真实砂岩微观模型, 泰州组, 草舍油田, 苏北盆地

Abstract:

Using the experimental technique of natural sandstone micromodel，an emmersion experiment of water sentivity is conducted for the Taizhou Formation reservoir sandstone in the Caoshe oilfield，Subei Basin. The experiment results show that the sandstone is moderate in water sentivity. In order to fully understand the impact of water-sensitive damage on water flood development，the water-drive-oil experiments of natural sandstone m icro-model are conducted，including two experimen types，i.e.a single model type and a combined model type，which simulate m icro-water-drive and macro-water-drive respectively and compare water-drive-oil variances before and after waterˉsensitive damage. The results show that the water-sensitive damage does not change the style of water drive oil and the configuration of residual oil. For the single model experiment，however，the bypassing phenomenon is strengthened on the whole and the oil displacement efficiency is lowered，mainly controlled by several factors such as water-injection pressure，water-injection location and micro heterogeneity. For the combined model experimen，the oil recovery ratio tends to decline totally，controlled by both the micro-heterogeneity and macro-heterogeneity. To avoid the impact of waterˉsensitive damage on water flood development，it is suggested that the injected water should be around11.99g/L in salinity.

Key words: oil displacement efficiency, water-sensitive damage, natural sandstone micro model, Taizhou Formation, Caoshe oilfield, Subei Basin

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