文章摘要
水平井用耐高温堵剂的制备及性能评价
Preparation and Performance Evaluation of Plugging Agent with High Temperature Resistance forHorizontal Well
  
DOI:10.19346./j.cnki.1000-4092.2017.04.010
中文关键词: 堵剂  酚醛树脂  耐高温  水平井
英文关键词: plugging agent  phenolic resin  high temperature resistance  horizontal well
基金项目:
作者单位
刘 强1, 朱卓岩1, 薛俊杰1, 李金永2, 甄建兵2, 郑建锋2, 欧阳坚1, 王 超1 1. 中国石油勘探开发研究院 北京 100083 2. 华北油田采油三厂 河北 河间 062450 
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中文摘要:
      为了在高温、 长射孔段、 长期水驱已形成高渗透窜流通道的水平井获得良好的堵水效果, 制备了一种热固性酚醛树脂类堵剂, 研究了该堵剂在地层温度 (110℃) 下的成胶性能、 封堵性能和耐冲刷性能, 并在楚 28-平 1井进行了先导性试验。结果表明, 80℃以下时堵剂为均相、 低黏水溶液, 物化性质稳定, 地层对堵剂的剪切、 吸附、色谱分离不影响其组成和成胶性能; 85℃以上时堵剂延缓缩聚, 随温度升高成胶时间缩短, 介于 12~48 h可控;形成的热固性、 热惰性冻胶经大排量、 大剂量水流冲刷, 在 110℃填砂管中的封堵率恒定在 96%, 显示出良好的高温封堵强度和耐水流冲刷能力; 堵剂热稳定性良好, 110℃老化 1年的理化性质变化较小。水平井堵水矿场试验结果表明, 堵剂被高压大排量选择性注入到高渗层, 在 110℃地层温度下形成冻胶, 可长期承受 8 MPa以上地层压差、 水流推力和近井地带负压作业对堵剂的抽吸力, 增油降水效果明显。图3表3参14
英文摘要:
      In order to obtain good water plugging effect in high temperature horizontal well with long perforation section and high permeability channel,a depth cross-linking thermosetting phenolic plugging agent was prepared. The gelling,plugging and flood flushing performance of plugging agent at formation temperature(110℃)were studied,and pilot test was carried out at Chu 28-P1 well. The experiment results showed that the plugging agent was homogeneous transparent and low viscous solution,and kept stable at the temperature lower than 80℃ . The effect of formation shearing,adsorption or chromatographic separation on the composition and gelling performance of plugging agent could be ignored. The delayed gelling time was shortened with the increase of temperature,which could be controlled between 12 to 48 h when the temperature was higher than 85℃ . Heated sand pack experiment indicated that the blocking ratio of cured agent kept stable to 96% even after flushed with large amount and high pressure of injected water,showing strong blocking strength and bearing hydraulic push. The gel properties kept stable after aging one year at 110℃ . Field test illustrated the technical advantages of plugging agent,such as being injected selectively to high permeability channel,balancing the formation pressure difference higher than 8 MPa at 110℃,bearing fluid pushing force and suction force generated by negative pressure operation near well.
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