Case Study: Potential Using Analysis Method Of Quantity, Quality And Maturity Level in "Injeksi-2" Well, North East Java

Abstract

This study aims to determine the potential of the host rock area in the North East Java Basin and is intended to determine the quantity, quality and maturity level of main rock content in the North East Java Basin. The method used is the Geo chemical method such as the Hydrogen Index, Rock Evapyrolysis, Tmax, Total Organic Carbon (TOC), and Vitrinite Reflectance. The potential of rocks aims to determine the formation of early Miocene Late Oligocene in the Wonocolo Formation, Tuban Formation, Tawun Formation, Kujung Formation, Ngimbang Karbonat Formation and Ngimbang Clastics Formation. In the Wonocolo Formation at a depth interval of 1445-2960 feet, it has a 0.6% TOC value with the Kerogen III (Gas-Prone) type shown, in the Bronze Formation with a depth interval of 3390-3929 feet with a TOC value of 3.8% and indicated by Kerogen Type II / III (Oil / gas mixture susceptible), in the Tuban Formation at a depth interval of 3929-4922 feet having a TOC value of 0.53% indicated by Kerogen III (gas-prone), in the Kujung Formation at a depth interval of 4660-7110 ft has a TOC value of 0.75% which indicates Kerogen III type (Gas-prone), in the Ngimbang Carbonate Formation at a depth interval of 7440-8103 feet having a TOC value of 0.66% with Kerogen III type (gas-prone) and in the Clastic Formation In weighing 8103 feet inside, the depth interval has a TOC value of 0.99% and 1.18% TOC with Kerogen III (gas-prone) type. Many rocks have a high TOC, but have the potential to produce low or little oil because the kerogen they contain mostly comes from wood which is said that the high TOC value does not always meet the criteria as host rock. Therefore, researchers tried to explain how to determine the host rock using the Geo chemical method approach in determining Quantity, Quality and Maturity Levels in the source rock.

AAPG Datapages/Search and Discovery Article #90354 © 2019 AAPG Asia Pacific Technical Symposium, The Art of Hydrocarbon Prediction: Managing Uncertainties, Bogor, (Greater Jakarta), Indonesia, August 7-8, 2019