Production Forecast Studies for Oil Well Performance Prediction and Field De-velopment Scenario Using Decline Curve Analysis in Multilayer Reservoirs: A Case Study of Field Z

Cahyadi Julianto (Department of Petroleum Engineering, Universitas Pembangunan Nasional “Veteran” Surabaya, East Java, Indonesia)
Hidayat Tulloh (Department of Petroleum Engineering, Universitas Pembangunan Nasional “Veteran” Surabaya, East Java, Indonesia)
Aldi Priambodo (Department of Petroleum Engineering, Universitas Pembangunan Nasional “Veteran” Surabaya, East Java, Indonesia)
Muhammad Rizky Nugroho (Department of Petroleum Engineering, Universitas Pembangunan Nasional “Veteran” Surabaya, East Java, Indonesia)
Haykal Kurniawan (Department of Petroleum Engineering, Universitas Pembangunan Nasional “Veteran” Surabaya, East Java, Indonesia)

Nusantara Science and Technology Proceedings
1st International Conference Eco-Innovation in Science, Engineering, and Technology

Field Z is located in the south Sumatra region with a reservoir located in the Talang Akar and Baturaja formation. Field Z has 9 layers and 29 wells have been produced until 2019. Based on the calculation of the JJ Arps method (water drive), the recovery factor of Layer 1 is 42,834%, RF layer 2 is 42.62% and layer 6 is 40.16%. This Arps can be estimated how much oil can be produced from OOIP owned by the reservoir. From these results obtained volumetric In-Place magnitude at Layer 1 = 11.52 MMSTB, Layer 2 = 17.99 MMSTB, and Layer 6 = 7.50 MMSTB. But the recovery factor of the Z field is currently only 9.67% in the last year of 2019. From this statement, it is necessary to develop a field development scenario. The method in this paper is to take data from the field and then the data is processed to forecast production using a decline curve analysis (DCA) using Oil Field Management software. After forecasting production, a scenario is then performed to extend the production life of the well.