geophysical studies using schlumberger Array (a case study gas pipeline in the region of Kamyaran – Marivan)

Nowadays, the detection of subsurface layers, faults and fractures by using electrical resistivity measurement is very common. The geoelectric measurements is a good way to detect the faults as well as to estimate the material and the thickness of subsurface layers. In this study, 15 Schlumberger Array were carried out on the gas pipeline in the region of Kamyaran - Marivan in order to study on the stone floor. First, the data were interpreted manually then to reach more precise result, the data was interpreted by using VES 1.30 software. Then the sections were produced by the softwares Excel, Surfer8 and AutoCAD. And finally, seven resistivity sections, one resistivity sub-section and two resistivity depth maps were produced. Based on the results, the maximum thickness of serpentine anomalies can be found below the electrical soundings Zd2.5, zf2 and zfl (Respectively 19, 14 and 14 m in thickness). Lateral variation of the electrical resistivity is observed between the soundings ZA3 and ZA2, ZB4 and ZB3, zfl and zf2, ZBl and ZA1 which can be considered as a fracture.