西南石油大学学报(自然科学版) ›› 2008, Vol. 29 ›› Issue (4): 15-18.DOI: 10.3863/j.issn.1000-

• 地质勘探 • Previous Articles     Next Articles

MICROSCOPIC EXPERIMENT OF THERMAL TREATED ROCK 

LIU Jun-rong1 WU Xiao-dong2   

  1. 1.School of Petroleum Engineering，China University of Petroleum,Dongying Shandong 257061，China;2.Faculty of Petroleum Engineering,China University of Petroleum，Changping Beijing 102249,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-08-20 Published:2008-08-20

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Abstract:

An experimental study of high temperature treatment is carried out on three types of rock samples，which come from reservoir formation,to study the effect of thermal treatment on mineral composition and microfracture network，which were measured by Scanning Electron Microscope （SEM） and mineral compositions analysis under the atmospheric pressure and room temperature.Results indicate that the mineral compositions change with the increasing temperature at 100℃ to 800℃ and part of the crystal structure is destroyed.Some intergranular,intragranular and transgranular fractures are induced in the rock during thermal treatment and forms a good connection of fracture network，which results in the increase of rock permeability.The change of crystal structure and the mechanism of fracture creation and extension are discussed，and the mechanism of permeability increase of thermal treated rock is also analyzed.The result will be used for reference on how to improve the flow condition at the nearwellbore formation by formation heat treatment

Key words: rock, thermal treatment, fracture, mineral composition, permeability

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