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The Forward Modeling of ThreeDimensional Geoelectric Field of Vertical Finite Line Source by FiniteDifference Method

XU Kai-jun，LI Tong-lin   

  1. College of GeoExploration Science and Technology，Jilin University,Changchun 130026,China
  • Received:2005-04-05 Revised:1900-01-01 Online:2006-01-26 Published:2006-01-26
  • Contact: XU Kai-jun

Abstract: A resistivity method with vertical line source has been used to study the distribution of injection water and surplus oil. The authors first infered the boundary condition for line source,then realised the forward calculation with finitedifference method.The forward calculation shown that when providing current through whole casing pipe,the electrical potential on surface is mainly effected by shallow resistivity anomaly,whereas when providing current only at gun perforation position,the electrical potential is on surface mainly effected by corresponding resistivity of gun perforation position.

Key words: finitedifference, vertical finite line source, providing current through casing pipe, gun perforation position

CLC Number: 

  • P631.3
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