傾斜基盤をもつモデルのVES曲線の反復解析
1987 年 103 巻 1192 号 p. 359-364
詳細
1987 年 103 巻 1192 号 p. 359-364
In field measurements with the Schlumberger method, the section of the data related to the depth of basement shows sometimes a slope of excess 45°C in the VES (Vertical Electrical Sounding) curve.
Though several reasons are believed to account for this phenomenon, here we assume it to be caused by an inclined basement, and calculate the theoretical VES curve for an inclined basement model. Curves displaying a slope of more than 45°C are obtained from those models. To confirm the theoretically calculated results, model experiments using a water tank were carried out. Experimental results are well consistent with the computed VES curves.
Next, a computer program intended for automatic analysis of horizontally multi-layered structures was improved to be applicable to the inclined two-layer case with an arbitrary dip angle of the interface.
This computation procedure was further developed for a horizontally multi-layered, model with an inclined basement, and applied to the data obtained from field measurements. These results show that automatically computed VES curves based on the inclined model can fully explain the field data.
