西南石油大学学报(自然科学版) ›› 2009, Vol. 31 ›› Issue (5): 143-146.DOI: 10.3863/j.issn.1674-5086.2009.05.03

• 油气化学工程与化工 • 上一篇    下一篇

XN-P大孔道封堵剂室内研究

徐卫东1 李科星2 蒲万芬2 赵冀2   

  1. 1.中国石化中原油田科技处,河南濮阳457001;2.西南石油大学石油工程学院,四川成都610500
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-10-20 发布日期:2009-10-20

LABORATORY STUDY ON XN-P HIGH CAPACITY CHANNEL BLOCK AGENT

XU Wei-dong1 LI Ke-xing2 PU Wan-fen2 ZHAO Ji2   

  1. 1.Department of Science and Technology,Zhongyuan Oilfield,SINOPEC,Puyang Henan 457001,China;2.School of Petroleum Engineering,Southwest Petroleum University,Chengdu Sichuan 610500,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-10-20 Published:2009-10-20

摘要: 针对大孔道地层胶结疏松,堵液易流失的特点,在80℃下采用低分子量聚丙烯酰胺作为主剂与交联剂反应生成一种可用于大孔道封堵的凝胶。该封堵体系含聚丙烯酰胺1.0%~3.5%,交联剂0.8%~1.4%。通过室内实验考察了主剂浓度、交联剂浓度、温度和地层水矿化度等因素对堵剂成胶时间和强度的影响。通过单岩芯物模实验,考察了堵剂的注入性和封堵能力。根据实验结果,该封堵体系成胶时间8~72h,在80℃下密闭保存7个月无变化。在大孔道或特高渗透地层(14644×10-3靘2)中阻力系数20.8,具有27.93MPa/m的强度和93.2%的封堵率;并具有成胶时间可控、强度高、稳定性好的优点,能够满足疏松砂岩油藏大孔道堵水的需要。

关键词: 疏松砂岩, 大孔道, 交联剂, 堵水, 凝胶

Abstract: The existence of high capacity channels in unconsolidated sand stone reservoir leads to the block agent fluid leaking easily.Using low PAM and crosslinker under the condition of 80℃ generates a block agent which can be used in high capacity channel water shutoff.The block agent consists of 1.0%~3.5%PAM and 0.8%~1.4% cross linker.Through the lab experiment,the influence of PAM concentration,crosslinker concentration,temperature and formation water salinity on gel strength and gel forming time are studied.By single core flow experiment,the shut off capacity of block agent is studied.This kind of block agent which needs 8~72h to form gel,has no alternation by seal packaged in 80℃ oven after 7 months.In high capacity channels or super high permeable formations(14644×10-3靘2),the resistance coefficient is 20.8 and the gel has the strength of 27.93MPa/m and the efficiency of water shutoff access to 93.2%.It has the advantages of controllable gel forming time,high strength,well stability,and can meet the need of unconsolidated sand stone reservoir water shutoff.

Key words: unconsolidated sand stone, high capacity channel, crosslinker, water shutoff, gel

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