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《Well Logging Technology》 1990-02
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Preliminary Study on the Calculation of Fracture Aperture Using Laterolog Log,

Luo Zhenyao  
It is very important to derive fracture parameters exactly since porosity and permeability of tight carbonate are very low and commercial gas flow only exists along withfracture. Discriminant function for fracture identification is computed from core data andlog responses at fractures in eight wells by means of discrimination analysis to quantify the re-sult of fracture identification. Three methods to derive apparent dip of fracture plane α aredescribed. Via elliptic integral, conductivity equation for fracture zone is investigated and de-rived when apparent dip α is any value. This equation not only takes the apparent dip of ac-tual fracture plane into account, but also reveals the functional relation between fracture ap-erture and such parameters as laterolog data, apparent dip and mud resistivity etc. Fractureaperture of 262 fracture layers in 24 wells has been calculated, showing that the resultsbasically coincide with structural feature and production in subarea estimation of gaspool. Thus a ew method for accurate derivation of fracture aperture is given in this paper.
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【References】
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1 LI Yu1,WANG Hong-hui1,LI Nan2,ZHOU Wen11.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology,Chengdu 610059, China;2.Research Institute of Exploration and Development,South-West Company,PetroChina,Chengdu 610051,China;Recognition of high angle fractures by logging and study of fracture distribution law in the Tabamiao Upper Paleozoic reservoir,Ordos Basin,China[J];Journal of Chengdu University of Technology(Science & Technology Edition);2007-02
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1 LI Gui-chun (Department of Computer Science,Baicheng Normal College,Baicheng 137000,China);The Application of Anti-Poland Formula in Procedure Designing[J];Journal of Baicheng Normal College;2007-06
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