<![CDATA[The Aksara Field, located offshore in the North East Java Basin, is a hydrocarbon exploration field targeting the Kujung and Ngimbang formations, which are dominated by carbonate rocks, shale, and marl inserts. To identify carbonate reservoirs as prospective hydrocarbon zones, a spectral decomposition seismic attribute analysis was conducted using the Continuous Wavelet Transform (CWT) method with low frequencies (15 Hz and 20 Hz) and high frequencies (45 Hz and 50 Hz). The data used included 3D Post Stack Time Migration seismic data, three well data points, and regional geological data. The research results indicated that the prospective hydrocarbon zone in the Kujung formation is located in the flank geological structure around the Pajang well, with carbonate sandstone distribution around three wells. In the Ngimbang formation, the prospective zone is situated in the anticline structure between the Janggar and Bitung wells, with the carbonate distribution primarily around the Janggar and Pajang wells.]]>
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