Abstract
Hydrocarbon prospect area research has been done in North Aceh at two locations. The research aims to analyze subsurface litology using resistivity method. Data acquisition of each location was presented by 330 m line survey. The acquisition process was generated by Super Sting R8/IP and modelled by EarthImager 2D. Oil and gas (NA1) resistivity section showed anomaly at 170 m (x) and 17 m (z) that was identified as minor fault. However, oil seepage was not founded on the location. Fossil locality (NA2) section showed a contrast vertical anomaly (16-90 Ωm) around 90 – 120 m that was identified as a way for the seepage.
Highlights
Oil and gas seeps are often occured in Lhokseumawe and North Aceh, in the eastern third of the Quadrangle
Based on the geological map of Lhokseumawe Quadrangle, Sumatra can be seen that potential areas of hydrocarbon potential are approximate boundary of oil and gas (NA1) and Fossil locality (NA2)
The NA1 area consists of Geureudong Volcanic Center and Julue Rayeu Formation and NA2 consists of the Julue Rayeu Formation [2]
Summary
Oil and gas seeps are often occured in Lhokseumawe and North Aceh, in the eastern third of the Quadrangle. The NA1 area consists of Geureudong Volcanic Center and Julue Rayeu Formation and NA2 consists of the Julue Rayeu Formation [2]. These two areas are both potential areas of hydrocarbons, but based on the direct observation in the field only in the area of NA2 the appearance of surface oil seepage found (Figure 1). Electrical resistivity survey provide a series of apparent resistivity values of subsurfarce rocks. These values are obtained at different locations along a profile by means of different electroda spacings (selected electrode array). Electrical resistivity survey in the area of hydrocarbon potential has been done previously in the area of Rantau Perlak East Aceh, it is suspected that oilcontaining layer in the area has resistivity value which ranges from 8 - 40 Ωm [4]
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