3D PROPERTIES MODELING TO SUPPORT RESERVOIR CHARACTERISTICS OF W-ITB FIELD IN MADURA STRAIT AREA

• Main Authors: Priatin Hadi Widjaja, D. Noeradi
• Format: Article
• Language: English
• Published: Marine Geological Institute of Indonesia 2017-07-01
• Series: Bulletin of the Marine Geology
• Subjects: modelling; reservoir; characteristic; V-shale; porosity
• Online Access: http://ejournal.mgi.esdm.go.id/index.php/bomg/article/view/27

The gas field, initial named W-ITB Field, is located at the southwestern part of the East Java sedimentary basin in Madura Strait area. W-ITB Field was discovered by W-ITB#1 well in 2006. In W-ITB#1 well gas reservoir layer was just only found at Selorejo and Mundu Formation, on the other hand, on W- ITB#2 the gas reservoir is not found in Mundu Formation. Determination of reservoir characteristic including the distribution and quality at W-ITB Field, was done by using 3D geological modelling both for structure and stratigraphy. This model was executed based on integration of well data (petrophysics) and cross section seismic interpretation. The results, at Zone 2 and Zone 3 for vertical V-shale distribution shows as a good quality reservoir (0-15%). Laterally distribution, area at southwest of W-ITB 1 well has low V-shale or chatagorized as a good quality reservoir. While, porosity distribution, zone 1 and zone 2 have better reservoir (29-35% V-shale value) than Zones 3 and 4. NTG distribution result indicates that zone 2 and 3, with high value means a good reservoir. Due to only two exploration well, to guide lateral distribution, so that acoustic from seismic data is used for porosity distribution.