Geostatistical Integration of Seismic Velocity and Resistivity Data for Probabilistic Evaluation of Rock Quality

탄성파 속도와 전기비저항 자료의 지구통계학적 복합해석에 의한 암반등급의 확률적 평가

  • Oh, Seok-Hoon (Dept. Geosystem Engineering, Kangwon National University) ;
  • Suh, Baek-Soo (Dept. Geosystem Engineering, Kangwon National University)
  • 오석훈 (강원대학교 지구시스템공학과) ;
  • 서백수 (강원대학교 지구시스템공학과)
  • Published : 2007.11.30

Abstract

A new way to integrate various geophysical information for evaluation of RQD was developed. In this study, we does not directly define the RQD value where borehole data are not sampled. Instead, we infer the probability of RQD values with prior probability of data directly obtained from borehole, and secondary supporting probability from resistivity and seismic tomography data. First, we applied the geostatstical indicator kriging to get prior probability of RQD value, and indicator kriging with soft data to get the supporting probability from resistivity and seismic data. And we finally applied the permanence ratio rule to integrate these information. The finally obtained result was also analyzed to fully utilize the probabilistic features. For example, we showed the probability of wrongly classifying the RQD evaluation and vice versa. This kind of analytical result may be used for decision making process based on the geophysical exploration.

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