Unocal has been a leading developer of Indonesia's energy resources for more than 30 years. In the late 1960s, Unocal Indonesia signed one of the world's first production-sharing contracts with Pertamina, Indonesia's national oil company. Currently, Unocal Indonesia operates 11 producing oil and gas fields offshore East Kalimantan, including Indonesia's largest offshore oil and gas field, Attaka, which the company discovered in 1970. The cumulative production of Unocal Indonesia to date is 890 MMB of oil and 1.87 TCF of gas.
Each day, a wealth of data related directly or indirectly to the volume of hydrocarbon production is collected at various points of oilfield operations. These data are transmitted to Unocal Indonesia's office via e-mail and are further processed for plant balance, gas allocation and monthly allocation. The raw and processed data can be accessed via Unocal Indonesia's Intranet for further data analysis and usage in simulation, mapping and general surveillance.
Until recently, a suite of four separate computer systems managed the production data. In 2000, Unocal Indonesia's Petroleum Engineering department decided to streamline the heterogeneous and proprietary solution by adopting a commercial master database and data management solution similar to the parallel data management effort in the Geological & Geophysical (G&G) domain. This effort is in line with the vision of knowledge management that can be created by integrating business processes and sharing information to manage the life cycle of Exploration & Production (E&P) assets.
This paper describes an integrated G&G and production data management system based on the Finder data management system and details how such a system improves employee productivity.
A phased approach has been adopted for implementation of the solution. The first phase involves consolidation of the legacy databases into a commercial master database that is built on an industry standard data model. In the second phase, the field data capture process will be improved and the current proprietary allocation and balance system will be replaced with a commercial solution.
The final result will be a single data repository providing Unocal Indonesia staff with validated, approved and easy-to-use data that is accessible via built-in data browsing facilities and inter-application data exchange utilities. In addition, the commercial system will require a smaller support staff, thereby freeing up more Unocal Indonesia team members to focus on maximizing the production and the recovery of reserves.
Unocal Indonesia operates offshore in East Kalimantan (Figure 1). Although there are scattered oil and gas fields, there are four major hubs of operation: Northern offshore (Attaka), Southern offshore (Sepinggan), Northern onshore (Santan terminal) and Southern onshore (Lawe-lawe terminal). Figures 2 and 3 show various field production facilities. Production data originates from these four field sites and are transmitted via e-mail to the city office at Pasir Ridge (Balikpapan). A team of petroleum engineering technicians input the data into various production databases for subsequent processing, including daily gas balance, gas allocation and monthly allocation for wells and zones. The data also are used for Web reporting and creating hard copy reports. Figure 4 shows this workflow. This workflow is known as the Unocal Indonesia Production Data Management System (PDMS).