自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 15    No. 2    April 2008

    

    

Application of deviation rate in oil and gas reservoir exploration
TANG Jing-tian(汤井田)1, ZHANG Ji-feng(张继锋)1, FENG Bing(冯 兵)2 ,WANG Ye(王 烨)1

1. School of Info-physics and Geomatics Engineering, Central South University, Changsha 410083, China;2. College of Geology Engineering and Geomatics, Chang’an University, Xi’an 710054, China

Abstract:Three dimensional geophysical models were abstracted and established according to characteristics of oil and gas reservoir. Then direct current fields for different models were simulated with finite element software (finite element program generator) by hole-to-surface resistivity method. Numerical solution was compared with analytical one for the homogeneity earth model. And a new parameter of deviation rate was proposed by analyzing different plot curves. The results show that the relative error of solution for homogeneity earth model may attain to 0.043%. And deviation rate decreases from 18% to 1% and its anomaly range becomes wide gradually when the depth of oil and gas reservoir increases from 200 to 1 500 m. If resistivity ratio of oil and gas reservoir to sur- rounding rock decreases from 100 to 10 for the resistive oil and gas reservoir, the amplitude attenuation of deviation rate nearly reaches 8%. When there exists stratum above oil and gas reservoir, and influence of resistive stratum may be eliminated or weakened and anomaly of oil and gas reservoir can be strengthened.

 

Key words: numerical simulation; deviation rate; oil and gas reservoir; hole-to-surface resistivity method; finite element program generator

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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