西南石油大学学报(自然科学版) ›› 2009, Vol. 31 ›› Issue (3): 130-133.DOI: 10.3863/j.issn.1674-5086.2009.03.030

• 油气化学工程与化工 • 上一篇    下一篇

高岭石与碱性驱替剂反应实验研究

熊生春1,2 刘卫东1,2 杨烨2 陈权生3 韩重莲4   

  1. 1.中国科学院渗流流体力学研究所,河北 廊坊 065007; 2.中国石油勘探开发研究院廊坊分院,河北 廊坊 065007;3.中国石油新疆油田分公司勘探开发研究院,新疆 克拉玛依 834000; 4.中国石油大庆油田采油工艺研究院,黑龙江 大庆 163000
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-06-20 发布日期:2009-06-20

EXPERIMENTAL STUDY ON THE REACTION BETWEEN KAOLINIT AND ALKALINE FLOODING AGENTS

XIONG Sheng-chun1,2 LIU Wei-dong1,2 YANG Ye2 CHEN Quan-sheng3 HAN Zhong-lian4

  

  1. 1.Institute of Porous Flow and Fluid Mechanics of Chinese Academy of Science,Langfang Hebei 065007,China;2.Research Institute of Petroleum Exploration and Development-Langfang PetroChina,Langfang Hebei 065007,China;3.Xinjiang Petroleum Exploration and Development Research Institute of PetroChina Xinjiang Oilfield company,Karamay 830011,China;4.Production Engineering and Research Institute of PetroChina Daqing Oilfield company,PetroChina,Daqing Heilongjiang 163000,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-06-20 Published:2009-06-20

摘要:

用聚四氟乙烯塑料反应器在25℃和45℃下,以20g/L的固液比,研究了高岭石与不同浓度NaOH或Na2CO3的溶蚀反应,反应时间为0~600h,用分光光度法测定反应后液相中硅、铝元素质量浓度,根据反应前后碱浓度的变化,计算反应绝对碱耗量;测定5.0%NaOH驱替过程中,高岭石填砂管渗透率和注入压力的变化。实验结果表明:高岭石在碱溶液中,通过扫描电镜能发现有明显溶蚀痕迹,在溶蚀反应前120h,溶液中硅、铝元素明显增加;相同温度下,高岭石在1.2%NaOH溶液中比5.0%Na2CO3溶液中碱耗量高;在碱驱过程中,渗透率上下波动,稳定后渗透率小幅下降。

关键词: 高岭石, 渗透率, 碱耗, 硅, 铝元素质量浓度, 地层伤害

Abstract:

Polytetrafluoroethylene Teflon inertia reactor is used,(under the conditions of 25℃ and 45℃,the 20g/L ratio of solid to liquid),to study the reaction between kaolin and NaOH and Na2CO3alkaline flooding agents with different concentration,the duration of reaction is 0~600h,according to silicon and aluminum standard curve,the spectrophotometry is done to concentration parameters of silicon and aluminium in liquid phase after reaction,based on the variation of alkaline concentration before and after reaction,the absolute alkaline loss is calculated under different conditions,the variation of kaolinit sand-filling pipe permeability and inflow pressure is measured during the process of 5%NaOH solution flooding.Experimental result indicates kaolin dissolves in alkaline solution,under the electronic scanning microscope,apparent dissolution can be observed,in the first 120h while dissolution reacting,the aluminum and silicon ion concentration increases remarkably.Under the condition of same temperature,kaolin will consume more alkaline in 1.2% NaOH than in 5% Na2CO3.During the process of alkaline flooding,permeability,after fluctuating,will tend to stability,after stability,the migration of the new minerals derived from alkaline dissolving kaolin results in the decrease of permeability in sand-filling pipe.

Key words: kaolin, permeability, alkaline loss, silicon and aluminum ion concentrations, alkaline-rock reactions, formation damage

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