#TITLE_ALTERNATIVE#

• Main Author: HARTANTO (NIM: 22014324), SRI
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/31047
• Institution: Institut Teknologi Bandung

<p align= "justify">Subsurface geological modeling of Kujung reef formation at JS-1 ridge only controlled by stratigraphic aspect without considering of structural aspects and made fault as boundary of oil and gas field. Fault Seal Analysis in carbonate using shale gouge ratio (SGR) method (Yielding, 1997) with major parameter are fault throw and volume shale (vsh), volume of shale calculated by two different methods: single parameter (log Gamma Ray) and dual parameter (log density and log neutron porosity) with correction by multi mineral data. Results of volume shale calculation using two methods had similar pattern with value around 0-0.2 “low vsh”, it cause faults in reef dominated more controlled by juxtaposition between reservoir to reservoir compare with flank/graben in northwest and southeast area. It can be seen on E-17 and E-3 faults (located in JS-1 ridge) with SGR with filter juxtaposition reservoir had value less than 16, whereas in E-11 fault (located in flank) with undeveloped reef facies the SGR value is more than 35 and made this fault as good sealing. Benefit of this research is to divine another exploration potential of accumulation hydrocarbon in three area consist: in JS-1 ridge area the hydrocarbon will be accumulate on structure higher of water zone, then in northwest area the hydrocarbon will be accumulated in upside reservoir that juxtapose with Kujung Reef, and in southeast area the hydrocarbon will be accumulated in below Kujung Reef reservoir with fault bounded at north side.<p align= "justify">