POTENSI CADANGAN HIDROKARBON FORMASI A, LAPANGAN B, CEKUNGAN BINTUNI, PAPUA BARAT

Abstract

The research entitled "Potential Hydrocarbon Reserves of Formation A, Field B, Bintuni Basin, West Papua" was carried out in Field B which is located in the Bintuni Basin, West Papua. The aim of this research is to produce an analysis of the hydrocarbon potential contained in Formation A or equivalent to the Lower Kembelangan Formation in Field B. Formation A in Field B has the potential for natural gas to be found in it, where based on studies that have been carried out previously, gas potential was found. 400 BCFG of earth in the Jurassic layer trapped by an Oligocene anticline, so it is hoped that the natural gas potential contained in Formation A in Field B can support energy needs in Indonesia. The available data comes from 3D seismic and seven well drilling. However, in this research only one drilling well was used, namely the JASMINE-1 Well because the well was located right in Field B.

The methodology in this research can be divided into four stages, namely the preparation stage, data processing stage, analysis stage, and report writing stage. In addition, the method used consists of seismic interpretation, petrophysical analysis, and Gas Initial In Place (GIIP) calculations with two approaches, namely deterministic and probabilistic. Seismic interpretation is used to interpret subsurface data such as faults and horizons involved in reservoir analysis. Based on seismic interpretation, results were obtained in the form of a subsurface map of the Middle Jurassic horizon (Formation A), a thickness map of Formation A, a map of Gross Depositional Environment (GDE) of Formation A, and a map of Reservoir Depositional Environment (RDE) of Formation A. The petrophysical analysis carried out was processing. Vshale, porosity, and water saturation using the GR, NPSS, RHOB, and RDEEP log curves from the JASMINE-1 Well. The results of the petrophysical analysis are Net to Gross (NTG), porosity, and gas saturation (Sg) of Formation A. In addition, the results of GIIP calculations for the Sand Meanwhile, for the Sand Y Reservoir with a thickness of 87 ft, the minimum GIIP value is 5 bcf and the maximum value is 154 bcf.

Based on research that has been carried out, this field has the potential to be developed by additional wells for hydrocarbon production or further studies.