西南石油大学学报(自然科学版) ›› 2001, Vol. 23 ›› Issue (3): 16-18(5.DOI: 10.3863/j.issn.1000-2634.2001.01.005

• 地质勘探 • Previous Articles     Next Articles

DETERMINATION OF FUZZY COMPREHENSIVE ESTIMATION WEIGHTING COEFFICIENT BASED ON ROUGH SET THEORY

SHI Xiao-fei1 ZHAO Qing-fei2   

  1. Research Institute of Petroleum Exploration and Development, CNPC, Beijing 100083, China
  • Received:2000-10-27 Revised:1900-01-01 Online:2001-08-20 Published:2001-08-20

Abstract: Fuzzy comprehensive estimation plays an important role in predicting favorite oil and gas-bearing regions and analyzing quantitatively their quality order in trap. In this method, it is very important to determine the geological factor weighting coefficient. Author of the paper applies Rough Set theory to de-
termine significance of each geological factors and then shift significance of attribution to weighting coefficient, which overcomes the shortcomings of subjectivity in determining weighting coefficient with the traditional method and improve the accuracy of evaluation. Lastly, an example of evaluating traps in south western Tarim Depression in Tarim Basin using this method to
induce weighting coefficient of geological factors is given.

Key words: rough set, weighting coefficient, trap, fuzzy comprehensive estimation

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