STATIC RESERVOIR MODELING OF AIR BENAKAT FORMATION LAYER X AND LAYER Y, FIELD N, JAMBI SUB-BASIN, SOUTH SUMATRA

• Main Author: Wijaya, Antonius
• Format: Theses
• Language: Indonesia
• Subjects: Geologi, hidrologi & meteorologi
• Online Access: https://digilib.itb.ac.id/gdl/view/34380
• Institution: Institut Teknologi Bandung

Field N is a field on Jambi Sub-Basin, part of South Sumatra Basin. In this basin there is Air Benakat Formation (ABF) which is a good formation for hydrocarbon reservoir. Air Benakat Formation is predominantly sandstone lithologies with inserts mudstone deposited on neritic environment and gradually into the shallow sea and the delta. There are several layers of rock on the Formation Air Benakat. Layer X and Layer Y are layers of Formation Air Benakat on Field N that has a hydrocarbon reserves with a sizeable amount. At Layer X and Layer Y have done some drilling wells to produce hydrocarbons, but not all the wells that penetrate those layers of found hydrocarbons, it is influenced by the presence of facies distribution is uneven. Facies distribution is very influential in the spread of hydrocarbons, so as to depletion of hydrocarbons, facies distribution in the Layer X and Layer Y needs to be known. Facies analysis results indicate a trend depositional facies from Northeast to Southwest direction to the deposition source of Ketaling High towards Jambi Sub-Basin. Accurate and integrated static reservoir modeling undertaken to distribute facies of sandstones and deployment of reservoir quality. Modeling results indicate that the value of porosity sandstone Layers X and Layer Y corresponding to the spread of their fasies, so it can be concluded that the development of porosity is controlled by depositional facies. The volume of hydrocarbon reserves calculation results by models based deposition their fasies more conservative than the calculation of the volume of hydrocarbon reserves in the by subsurface map analysis. The resulting static reservoir model can then be used for the development of the Layer X and Layer Y in the Field N, mainly to the addition of point absorbency and optimization of expected production results will be better.