文章摘要
低成本 O/W型乳液与岩心孔吼配伍性及其驱油效率
Oil Displacement Efficiency and Pore Size Matching of an Economic O/W Emulsion Flooding
  
DOI:
中文关键词: 低成本化学驱  O/W乳液  流动行为  驱油效率  匹配系数
英文关键词: economic chemical flooding  O/W emulsion  flow behavior  oil displacement efficiency  matching factor
基金项目:国家科技重大专项 “塔里木盆地碳酸盐岩油气田提高采收率关键技术示范工程” (项目编号 2016ZX05053)。
作者单位
宁 健 1, 魏 兵 1, 高 炎 2, 王牧明 1, 蒲万芬 1, 王崇阳 3, 王生奎 4 1. 西南石油大学油气藏地质及开发工程国家重点实验室 四川 成都610500 2. 中国石油新疆油田分公司百口泉采油厂 新疆 克拉玛依 834000 3. 中国石油西南油气田分公司川西北气矿梓潼采气作业区 四川 绵阳622150 4. 四川伯邦能源科技有限公司 四川 成都610500 
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中文摘要:
      本文利用廉价碱和少量高酸值稠油, 建立了一种低成本 O/W型乳液驱方法, 并系统研究了乳液的物理性质 以及在多孔介质中的流动行为和驱油效率。研究结果表明, 在油水比 0.5∶9.5 条件下, 通过调整转速(1500~ 2600 r/min)和搅拌时间(0.5~ 2 h)制备的一种不稳定型和三种稳定型的 O/W型乳液, 在岩心中流动时, 由于贾 敏效应, 稳定型乳液的注入压力明显升高, 而不稳定型乳液发生油水分离, 注入压力变化不明显。从乳液驱效果 上看, 转速 2000 r/min、 搅拌时间 1.5 h下形成的稳定乳液可以有效提高原油采收率达 17%。乳液液滴和岩石孔喉 的匹配系数f小于 1时, 乳液的驱油效率不高; f大于 1时, 乳液液滴能对岩心孔喉有效封堵, 提高采收率明显。但 是并非f越大提高采收率越高。图13表 4参15
英文摘要:
      An economic chemical method was proposed based on the reaction between alkali and high acid crude oil, and the physical properties of the formed emulsion, flow behaviors and oil displacement efficiency were comprehensively investigated. It was shown that under the condition of oil to water ratio of 0.5 ∶9.5, an unstable and three stable O/W emulsions were prepared by adjusting the rotating speed(1500—2600 r/min)and stirring time(0.5—2 h) . Due to the Jiamin effect, the injection pressure of the stable emulsion significantly increased when flowing in the core, while the unstable emulsion occurred oil-water separation, and the injection pressure did not change significantly. The stable emulsion formed at a rotational speed of 2000 r/min and a stirring time of 1.5 h could effectively increase oil recovery by up to 17%. When the matching factor f between the emulsion droplets and the rock pore throats was less than 1, the oil displacement efficiency of the emulsion was not high;when f was greater than 1, the emulsion droplets can effectively block the pore throat and increase the recovery efficiency. However, the higher f was not always better.
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