Schlumberger

Technical Paper: Samarang Field: Seismic To Simulation Redevelopment Evaluation Brings New Life to an Old Oilfield, Offshore Sabah, Malaysia

Society: SPE
Paper Number: 13162
Presentation Date: 2009
 

Abstract

The Samarang field is a 35-year-old oil field offshore Malaysia initially developed by Shell beginning in 1975. The field was relinquished to Petronas Carigali Sdn Bhd (PCSB) in 1995, whose efforts significantly reduced the production decline rates. PCSB also transformed the field into a producing hub, allowing development of two small adjacent fields by reducing the required capital costs. However, by 2003 production was declining and reserves dwindling, suggesting future field abandonment.

Beginning in 2004, PCSB outsourced a major redevelopment evaluation to a multidisciplinary, international consulting team. PCSB maintained control by using internal expertise to peer review and assist the team’s progress throughout the evaluation and at key-milestone meetings. This process allowed PCSB to leverage their own organization’s skills while using new technology tools employed by the team.

The evaluation included a complete review of all static data, literally a seismic-to-simulation study approach employing virtually every subsurface discipline in an attempt to unlock the field’s remaining value. The paper discusses the results, which included full-field static and dynamic models that enabled an integrated redevelopment plan. Field redevelopment is underway in a phased approach including 1) ongoing production enhancement, 2) sidetracking of idle wells to updip positions, 3) addition of new well jackets for additional development wells, and 4) selective injection into the larger reservoirs with relatively lower primary recovery.

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