西南石油大学学报(自然科学版) ›› 2002, Vol. 24 ›› Issue (5): 61- 64.DOI: 10.3863/j.issn.1000-2634.2002.05.019

• 油气化学工程与化工 • 上一篇    下一篇

砂岩基质酸化中HF 与铝硅酸盐的二次、三次反应研究

王宝峰1 赵忠扬1 薛芳渝2
  

  1. 1. 中石油勘探开发研究院廊坊分院压裂酸化中心,河北廊坊065007 ; 2. 清华大学化学系,北京100084
  • 收稿日期:2001-12-04 修回日期:1900-01-01 出版日期:2002-10-20 发布日期:2002-10-20
  • 通讯作者: 王宝峰

STUDY OF THE SECOND AND THE THIRD REACTIONOF HF ON ALUMINA SILICATE DURING SANDSTONE MA2 TRIX ACIDIZING

WANG Bao-feng , ZHAO Zhong-yang , XUE Fang-yu   

  1. Langfang Branch of RIPED , Langfang Hebei , 637001 , China
  • Received:2001-12-04 Revised:1900-01-01 Online:2002-10-20 Published:2002-10-20
  • Contact: WANG Bao-feng

摘要: 为进一步弄清土酸的真实溶液化学行为,应用19 FNMR 结合岩心流动实验深入研究了砂岩基质酸化过程中HF与铝硅酸盐的化学反应,实验结果证明其间不是简单的一次反应,存在二次反应和三次反应,并受地层温度及矿物组成等因素的影响:60 ℃以上,H2SiF6 与铝硅酸盐的二次反应逐渐进行完全;90 ℃以上,氟铝配合物与铝硅酸盐三次反应愈来愈明显。1 9 FNMR 能区分氟铝配合物和氟硅配合物的具体形态。室内实验结果为现场实施提供了理论依据:高浓度的HF( ≥3 %) 不但存在破坏地层骨架的危险,还会给储层造成新的伤害,在具体实施酸化增产增注措施时,应根据实际情况使用低浓度的HF( ≤1 %) ,并使HCl 与HF 的比例合适,才能既保证酸化的成功又能延长其有效期。

关键词: 19 FNMR, 砂岩基质酸化, 岩心流动试验, 二次反应, 三次反应

Abstract: In order to understand chemical characteristic of real solution of mud acid , a detail study on chemical reaction of HF on aluminaOsilicates during sandstone matrix acidizing has been carried out by using  19 FNMR spectroscopy. Experimental results show that the chemical reaction of HF on aluminaOsilicates exists the second and the third reaction. The reaction of H2SiF6 on aluminaOsilicates gradually proceed until completely when the
formation temperature is over 60 ℃. The third reaction is more and more obviously , and the aluminum fluoride complexes are different in condition of 90 ℃. We can distinguish respective configuration of aluminum fluoride complexes and silicon fluoride complexes by using  19 FNMR spectroscopy. The results of room experiments have provided the theory basis for field
treatment .
 

Key words: 19 FNMR, coreOf low test, sandstone matrix acidizing, the second reaction, the third reaction

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