西南石油大学学报(自然科学版) ›› 2006, Vol. 28 ›› Issue (3): 41-43.DOI: 10.3863/j.issn.1000-2634.2006.03.013

• 石油工程计算技术 • Previous Articles     Next Articles

EXPERIMENT STUDY ON SOLID-PHASE CHANGE OF SMECTITE REACTION WITH ACIDS

TANG Hong-ming 1，2 HUANG Xiao-qiong3 YUAN Xu-zu4 et al.

  

  1. (State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation·Southwest Petroleum Uni-versify, Chengdu Sichuan 610500，China)
  • Received:2005-03-21 Revised:1900-01-01 Online:2006-06-20 Published:2006-06-20
  • Contact: TANG Hong-ming

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Abstract: The chemical reactions of smectite with the acid 5% HCI. 0. 5% HF+5% HCI. 1. 0% HF+5 % HCl systems of0. 5% HF,1. 0% HF, 8% HB凡，7% HB凡+5% HCl have been systemati-tally investigated场utilizing X' Pert PRO X一ray and XL -30 spectral SEM, etc. The change of solid-phase parameters of remaining smectite after reaction has been especially analyzed. It is concluded the value of Si/Al in residual acid fluid is lower and Si/Al value of the ning smectite is higher than the the-oretical prediction because alumina octahedral is more corroded
by acids than silicon-oxygen tetrahedral. After 2 hours of reac-lions between smectite and 7% HB凡&7% HBF,+5% HCI, it is found that d ( 001)crystal surface has been ruined and new peak has been observed, therefore, Fand Betc. are helpfulfor mineral transformation from smectite.

Key words: smectite, mud acid, fluorboric acid, crystal structure, diffraction analysis, spectral analysis

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