RESERVOIR CHARACTERIZATION OF BATURAJA CARBONATE IN THE JODIPATI FIELD OFFSHORE NORTHWEST JAVA BLOCK (ONWJ)

• Main Author: TRIYONO , WAHYU
• Format: Theses
• Language: Indonesia
• Subjects: Geologi, hidrologi & meteorologi
• Online Access: https://digilib.itb.ac.id/gdl/view/12759
• Institution: Institut Teknologi Bandung

Jodipati Field is located on the Offshore North West Java Block (ONWJ) that operated by BP Indonesia, has produced oil and gas from the Upper Cibulakan Formation or known as Main-Massive Formation and from Baturaja Formation. Jodipati Field consists of the North Jodipati, Central Jodipati and South Jodipati, but Baturaja Formation so far only proven producing hydrocarbons in the South Jodipati (Jodipati B field), that producing hydrocarbon from Baturaja Formation with cumulative production of 9.5 MMBO and gas 8.4 BCFG, while in North Jodipati and Central Jodipati Fields had not yet been produced hydrocarbons. Based on the drilling results indicate that the reservoir quality relatively poor in that area. The well data show that very difficult to identify the reservoir distribution laterally. That is the main problem in developing the Baturaja Formation in Jodipati area. Based on the structure map of Top Baturaja and carbonate build-up distribution, Jodipati area still has potential to be explored but difficult to predict the reservoir distribution, so this is a challenge. To resolve this problem, it has been done mapping the structure and isochron to get the paleo-structure during carbonate deposition, also analysis of seismic facies in build-up anomaly that controlled by well data such as log data, core and cutting sample. The results are carbonate deposition environment map and trend of iv carbonate build-up distribution, so that we can predict the reservoir distribution laterally. Based on the interpretation of seismic and log characterization, show that the seismic and log type that located in different depositional environment have different character. The trend of reservoir distribution is controlled by water depth, diagenesis and fracturing due to the fault presence.