Publications

Tiger field was initially developed in 1990 as an oil field with gas injection as its reservoir pressure maintenance. The field was converted into gas production mode in 2000 following the gas sales agreement that authorized Premier Oil Indonesia to commercialize its significant gas accumulation. Located in offshore Natuna Sea with highly stratified reservoirs, diverse reservoir qualities and complex fault block systems, compel the Tiger gas field development very challenging. The understanding of reservoir performance and potential, well productivity and facility limitations are the essential components to develop commercial strategy in maximizing the asset value. As the field is maturing overtime, the reservoir and production challenges need to be addressed. Depleted reservoir pressure, increasing mechanical skin and unexpected water production are some of the most common problems in gas field life-cycle, which can hasten the off-plateau period and lead to suboptimum production. A collaboration of multidisciplinary team supported by well-planned surveillance programs was established to overcome these problems, which, simultaneously optimizing asset value. This paper presents the efforts of Premier Oil Indonesia in maximizing Tiger field asset value through proactive reservoir surveillances and structured production optimization implementations. It concisely describes the workflow which includes identification, prioritization and evaluation process. With these processes, we were able to analyze potential value of the programs including its risks (e.g. subsurface risk, operation risk, etc.) and economic merit, which is very crucial in this low oil price environment. The integrated cross-functional works have generated substantial number of short term and long term optimization opportunities (e.g. additional perforation, re-perforation, well stimulation, infill drilling, etc.) that increase total potential initial deliverability up to 311 MMscfd from 22 opportunities and provide additional hundred millions USD potential revenue against current field production baseline.