The Bahrain Field, located onshore Bahrain, consists of multiple producing oil and gas reservoirs. The oil zones have been developed with approximately 1,040 wells flowing into 16 well manifolds and 6 tank batteries. Approximately 3,000 more wells could potentially be drilled in the future. The Khuff gas reservoir has an independent gathering network and has been developed with 45 wells.

Two separate integrated production system models have been built, one each for oil and gas. This paper describes how these models were built, the challenges in maintaining and calibrating these models and the value creation. Both models are used for day-to-day production management under various system constraints and also for long term field development planning.

The oil model has changed how well and system analysis is performed in the asset, as operational and development decisions are being implemented based on the model recommendations. The results are very encouraging, allowing more visibility and credibility for the model's use across various engineering disciplines.

The gas model, although relatively simple compared to the oil model, is the key tool used for optimization and development planning of the Khuff surface network. This model is used to calculate the capacity of the system, helping to ensure that demand requirements are met. The integrated gas model of the Khuff reservoir, wells, gas dehydration units and transmission system is currently being used for studying various long-term field development scenarios to identify the most cost effective way forward.

The concept of integrated production system modeling is gaining ground in the oil and gas industry. This work reiterates that this concept can be applied at any scale from large to small fields, while reaping significant benefits during the life of the field.

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