西南石油大学学报(自然科学版)

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Analyzing the Effect of Rock Electrical Parameters on the Calculation of
the Reservoir Saturation

Li Xiongyan, Qin Ruibao, Liu Chuncheng   

  1. CNOOC Research Institute,Dongcheng,Beijing 100027,China
  • Online:2014-06-01 Published:2014-06-01

Abstract:

Abstract:Based on the Archie formula,the effect of variable m and n on the saturation is analyzed,and the error formula of
calculating the water saturation of reservoirs caused by the error of m and n is derived. On the basis of the loose sandstone,
medium sandstone,tight sandstone,conglomerate,tuff,breccia,basalt,andesite,dacite and rhyolite,this paper first analyzes
the distribution range and change amplitude of m and n. Secondly,the impact of m and n on the calculation of the water
saturation of reservoirs is discussed. With regard to each lithology,the distribution range and change amplitude of m is greater
than those of n. Therefore,compared with n,the effect of m on the saturation is stronger. When the error of m is ±0.2,the
error in the calculation of the water saturation of reservoirs is almost all above 5%,and the maximum is even more than 30%.
Meanwhile,when the error of n is ±0.2,the error in the calculation of the water saturation of reservoirs is almost all below 5%.
The influence of m and n on the saturation is determined,and the error in the calculation of the water saturation of reservoirs
caused by the error of m and n are calculated. It is theoretically and practically significant to the precise calculation of saturation
of complex reservoirs.

Key words: Key words:reservoir evaluation, Archie formula, rock electrical parameters, saturation, error analysis