Publications

The world’s energy need is on the rise from time to tome, particularly for oil and gas. Various methods have been used to find hydrocarbon. The development of hydrocarbon exploration and the optimization of basin study are growing steadily. Seismic method is a geophysics method that is mostly used for exploration and field development in oil and gas industry. One of the developments of seismic method for interpretation is seismic inversion. This study aims to help mapping the sandstone reservoir distribution of Cibulakan Formation, in Cemara Field, North West Java Basin. The reservoir was deposited in shallow marine environment. This study uses pre-stack seismic data and well logs data. Acoustic impedance values in this study area cannot make the differences between sandstone and the others lithology. From the crossplot result, it is known that Lambda-per-Mu (λ/μ) is the sensitive parameter to discriminate lithology in this area. Sandstone reservoir in study area has low Lambdaper- Mu (λ/μ) values. Lambda-per-Mu (λ/μ) was approached by Extended Elastic Impedance (EEI) at angle of chi (χ) 46°. That impedance value is used for determining lithology between sandstone and shale. The inversion result is validated with geologic data. This study yields sandstone distribution map, which can be used for indentifying hydrocarbon accumulation. From seismic inversion and well correlation, it is known that sandstone distribution is from North West to South East and parallel to the coastal line.