GEOCHEMICAL CHARACTERIZATION OF SOURCE ROCK AND MODELLING 1D IN X FIELD, NDUGA REGENCY AND YAHUKIMO REGENCY, PAPUA PROVINCE

• Main Author: HARTADI (NIM : 12013074), IVAN
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/22650
• Institution: Institut Teknologi Bandung

Administratively, research area is located in field X, Nduga Regency and Yahukimo Regency, Papua Province. Geologically, research area is located in Akimeugah Basin. Data used on research equal three well, that is well I, well V, and well N, as well seismic data which is cross from north to south through well I for geological section. <br /> <br /> Geochemical analysis were conducted to well I, well V, and well N to determine charactestic of quantity, quality, and maturity of organic matter each formation. Modelling 1D were conducted to well I for represent geological history and maturity history based on Ro value. Geochemical analyses which is conducted involve Rock-Eval pyrolisis and vitrinite reflectance analyses. Based on the analyses, Buru Formation have low quantity, immature, and belong to type I, II, and III. New Guinea Limestone Group have low quantity, immature, and belong to type II and III. Piniya Formation have fair quantity, mature, and belong to type II and III. Brug Formation have low quantity, post mature, and belong to type II. Formation that potentially has a source rock is Piniya Formation. <br /> <br /> Modelling 1D were conducted to well I, the result is occured three times forming of basin is pre-rift (Carbon – Permian), syn-rift (Triassic – Early Jurassic), and post-rift (Early Jurassic – Pleistocene). There is process of erosion on Brug Formation and Piniya Formation which is caused unconformity. Early mature started at Pliocene (2,33 Ma) on base of Brug Formation, and then mature started at Pleistocene (1,15 Ma) on base of Brug Formation. Recently early mature occured on bottom Buru Formation, New Guinea Limestone Formation, and Piniya Formation, as well mature occured on Piniya Formation and Brug Formation.