新疆石油地质

新疆石油地质 ›› 2011, Vol. 32 ›› Issue (5): 547-549.

• 油气工程地质 • 上一篇    下一篇

高温生物酶破胶剂在克拉玛依油田压裂液中的应用

张天翔1, 潘竟军1, 杨平2, 梅晓丹2   

  1. 1.中国石油新疆油田分公司采油工艺研究院,新疆克拉玛依 834000;
    2.大连百奥泰科技有限公司研发中心,辽宁大连 116025
  • 收稿日期:2011-01-14 出版日期:2011-10-01 发布日期:2020-08-19
  • 作者简介:张天翔（1965-）,男,江苏宜兴人,高级工程师,硕士,油气层改造,（Tel）0990-6885660（E-mail）cyyzhangtx@163.com.

Application of High-Temperature Enzyme Breaker to Fracturing Fluid in Karamay Oilfield

ZHANG Tian-xiang1, PAN Jing-jun1, YANG Ping2, MEI Xiao-dan2   

  1. 1. Oil Production Technology Research Institute, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China;
    2. R&D Center, Dalian BITeomics, Inc., Dalian, Liaoning 116025, China
  • Received:2011-01-14 Online:2011-10-01 Published:2020-08-19

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摘要： 研究了用生物酶破胶剂来解决克拉玛依油田压裂液体系破胶不彻底、对地层伤害大这一难题的可行性。结果表明,调整生物酶用量至250 mg/L 和添加酶保护剂250 mg/L,并与0.01%过硫酸铵复配,2.5 h 可以彻底破胶,破胶液黏度为3.3 mPa·s,残渣量280 mg/L,且无返胶现象。质谱分析破胶液分子量集中在2 147~6 366 Da,主要为13~39 低聚糖分子,表明生物酶破胶剂将瓜尔胶彻底降解成小分子的多糖化合物,解决了破胶不彻底并返胶的难题。

关键词: 克拉玛依油田, 生物酶破胶剂, 高温, 压裂, 保护剂, 黏度, 残渣

Abstract: Karamay field fracturing fluid system occurs in the problems of incomplete guar gum breaking and oil layer damage. The study showed that the high-temperature enzyme breaker had incompatibility with additives of the Karamay fracturing fluid system. The fracturing fluid viscosity can be reduced to 3.3 mPa·s within 2.5 h by adding 250 mg/L enzyme breaker, 250 mg/L protective agent and 0.01% ammonium persulfate, and the residue of 280 mg/L, which meet the national standards of an oilfield. The molecular weight of the fracturing fluid was measured by mass spectrometry, which was mainly concentrated in the range of 2 147~6 366 Da, indicating that the enzyme breaker can be used to decrease the viscosity of fracturing fluid and degrades gum to oligosaccharides.

Key words: Karamay field, enzyme breaker, high temperature, fracturing, protective agent, viscosity, residue

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