特低渗油藏氮气泡沫驱适应性评价及效果分析

文章摘要

特低渗油藏氮气泡沫驱适应性评价及效果分析

Adaptability Evaluation and Effect Analysis of Nitrogen Foam Flooding in Ultra-low Permeability Reservoirs

投稿时间：2019-07-10 修订日期：2019-07-10

DOI：

英文关键词: ultra-low permeability reservoir nitrogen foam flooding low recovery rate poor water flooding effect Yancahng oil field

基金项目:

作者	单位	邮编
杨兴利	延长油田股份有限公司宝塔采油厂	716005
张京伦	中国石油大学（北京）石油工程学院
焦伟杰	延长油田股份有限公司宝塔采油厂
涂彬^*	中国石油大学（北京）石油工程学院	102249
何敏侠	中国石油大学（北京）石油工程学院
师晓伟	延长油田股份有限公司宝塔采油厂
李梦勤	中国石油大学（北京）石油工程学院

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中文摘要:

为了提高延长油田沙家沟区块氮气泡沫驱开发效果,为此本文开展了沙家沟区块氮气泡沫驱适应性评价和效果分析。沙家沟区块位于陕北斜坡东部宝塔油田南部,主力油层为长6储层,各小层平均渗透率均介于0.69～1.38mD,属于低孔-特低渗储层。该区块天然能量开发时间长,且注水开发前全区综合含水率高达40%,水驱开发半年后普遍出现水窜、水淹现象。氮气泡沫驱在沙家沟区块具有较大潜力,本文通过对沙家沟储层及开发特征、氮气泡沫驱作用机理及对氮气泡沫驱在沙家沟区块的适应性进行分析研究,同时开展了沙家沟区块现场实验效果评价。结果显示氮气泡沫驱在沙家沟区块适应性好,可以有效减缓沙家沟区块的自然递减率,起到明显的降水增油效果。

英文摘要:

In order to improve the development of nitrogen foam flooding in the Shajiagou block of Yanchang Oilfield, this paper carried out the evaluation and effect analysis of nitrogen foam flooding in the Shajiagou block. The Shajiagou block is located in the southern part of the Baota Oilfield in the eastern Shaanxi Slope. The main oil layer is the Chang 6 reservoir. The average permeability of each small layer is between 0.69 and 1.38 mD, which belongs to the low porosity-extra low permeability reservoir. The natural energy development time of this block is long, and the comprehensive water content of the whole area before flooding development is as high as 40%. After half a year of water flooding development, waterlogging and flooding are common. Nitrogen foam flooding has great potential in the Shajiagou block. This paper analyzes the reservoir and development characteristics of Shajiagou, the mechanism of nitrogen foam flooding and the adaptability of nitrogen foam flooding in the Shajiagou block. The effect evaluation of the on-site experiment in the Shajiagou block was carried out. The results show that the nitrogen foam flooding has good adaptability in the Shajiagou block, which can effectively slow down the natural decline rate of the Shajiagou block and play an obvious role in precipitation and oil increase.

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