Estimation of gas volume based on four wells in the G field, East Sengkang Basin, South Sulawesi Indonesia
DOI:
https://doi.org/10.24028/gj.v48i2.350701Keywords:
gas reservoir, well logging, qualitative and quantitative interpretation, Archie equation, 3D modeling of reservoir, total hydrocarbon volumeAbstract
Research in Sulawesi is still very limited due to the complex tectonic conditions. Due to the lack of drilling, subsurface formation data is very limited, so further research is needed. Against this background, this study attempts to estimate the gas volume in the G field, based on four oil and gas wells in the East Sengkang Basin, South Sulawesi. Fortunately, the wells are located close together, allowing for accurate volume estimation. The four wells are GI-1, GI-2, GI-3, and GI-4. The objectives of this study are: first, to determine the depth of the gas reservoir zone (qualitative-quantitative); second, to determine the total gas volume in the reservoir zone. Gas volume estimation uses well logging methods to obtain subsurface data, specifically hydrocarbon potential. Bulk reservoir volume is a representation of the volume of a 3D model that is influenced by reservoir thickness. Determining the bulk reservoir volume is used to estimate the volume of gas hydrocarbons. 3D modeling is an important method in the oil and gas industry to understand subsurface characteristics. Therefore, the findings are expected to provide important insights for energy resource development and serve as a reference for the oil and gas industry in evaluating gas hydrocarbon potential. The results showed a water saturation below 30 % with a resistivity above 60 Ohm·m, indicating the presence of gas. Furthermore, the total gas volume was 4.46⋅108 m3, indicating significant potential in the prospective reservoir zone. The gas potential in the entire Sengkang Basin field block reached 226.5⋅108 m3, while the calculated gas volume in the study area resulted in 4.46⋅108 m3. Based on these calculations, the gas volume in the study area is quite realistic.
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