石油学报 ›› 2000, Vol. 21 ›› Issue (5): 62-67.DOI: 10.7623/syxb200005013

• 油田开发 • 上一篇    下一篇

多元复合酸酸化工艺的应用

张学锋1, 赵普春1, 祝明华1, 苏永国2, 陈洪1   

  1. 1. 中原石油勘探局采油三厂, 山东莘县252434;
    2. 中原石油勘探局天宇化工厂, 山东莘县252434
  • 收稿日期:1999-03-26 修回日期:1999-11-14 出版日期:2000-09-25 发布日期:2010-05-21
  • 作者简介:张学锋,男.1975年3月生.1996年毕业于西北大学化学系.现为中原石油勘探局采油三厂助理工程师.通讯处:山东省苹县古云采油三厂工程技术大队.

APPLICATION OF POLYATOMIC-RECOMBINATION ACID TECHNOLOGY

ZHANG Xue-feng1   

  1. Zhangyuan Petroleum Exploration Bureau, Puyang 457000, China
  • Received:1999-03-26 Revised:1999-11-14 Online:2000-09-25 Published:2010-05-21

摘要: 卫城油田是典型的高压、低渗断块砂岩油藏,历年来酸化效果较差.从卫城油田的油藏物性等方面出发,分析了制约其酸化效果的因素:酸渣的影响、铁离子二次沉淀的影响,残酸返排的影响.针对这些问题,研究应用了多元复合酸酸化工艺技术,该工艺采用了独特的挤酸排酸一体化管柱.室内试验表明:该酸液具有缓速性能好、能有效防止铁离子二次沉淀、有效防止酸渣生成、与地层水配伍性好、防膨能力强、排残酸迅速等特点.现场应用高压注水井7口,平均降低注水压力12.8MPa,累计增加注水量27652m3,取得了较好的降压、增注效果.

关键词: 低渗透, 多元复合酸, 酸化, 降压, 增注, 应用

Abstract: Weicheng Oilfield is a typical rock sandstone oil reservoir.The result of acidizing is comparatively poor in recent years.Based on physical phenomenon of Weicheng Oilfield reservoir, influence factors of acidizing: influence of acid sludge, secondary precipitation of iron ion and influence of acid liquid discharged, were analyzed. Aimed at these problems, polyatomic-recombination acid was brought under research and application.Negative pressure extrusion acid and discharged acid integrated pipe string were used of this technology. This acid liquid having distinguishing feature as: ability to prevent secondary precipitation of iron ion effectively,ability to prevent acid sludge coming into being effectively,fine compatibility with formation water and fine ability to antiswelling.All these were proved in the lab.This technology was used in seven high pressure water wells and injection pressure decreases 12.8 MPa on average,cumulative increase water injected 27652m3. Comparatively fine result of decreasing injection pressure and increasing water injected are obtained.

Key words: polyatomic-recombination acid, acidizing, depressurization, augmented injection

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