STATIC RESERVOIR MODELLING AND HYDROCARBON RESERVES ESTIMATION OF RESERVOIRS S DAN W, NIKA FIELD, SOUTH SUMATRA BASIN, SOUTH SUMATRA.

• Main Author: Rafli Abdallah, Muamar
• Format: Final Project
• Language: Indonesia
• Subjects: Geologi, hidrologi & meteorologi
• Online Access: https://digilib.itb.ac.id/gdl/view/78869

Nika Field is one of the oil fields in the South Sumatra Basin. This research analyses facies, depositional environment, structure, geometry, properties dan hydrocarbon reserves of Reservoirs S dan W in the field. The data employed are from 11 wells. The method used includes the application of sequence stratigraphy concepts dan three-dimensional (3D) static geological modelling. In the study area, there are six lithofacies: very fine to fine bioturbated sandstone (Sb), fine parallel laminated sandstone (Sp), mudstone – parallel laminated siltstone (Mp), mudstone – lenticular siltstone (Ml), mudstone – massive siltstone (Mb), dan cross-laminated sandstone (Sc). These six lithofacies can be grouped into three facies associations: tidal sand bar, sand flat, and mud flat which were deposited in a tide-dominated estuary environment. The results of the 3D static modelling reveal an estimated hydrocarbon reserve of ~66.1 to 70.45 MSTB for Reservoir S dan ~22.3 MSTB for Reservoir W