(373v) A Mixed Integer Non-Linear Programming Model for Optimizing the Operation of a Complex Gas-Oil Separation Network
This work addresses optimizing the operation of a complex network of GOSPs in one of Saudi Arabiaâs largest oilfields. These GOSPs are connected by pipelines which are constructed only between nearby plants where wells can flow naturally based on excess reservoir pressure and without the need to use any artificial surface boosting or subsurface lifting. The goal is to operate this network such that oil production targets are met at minimum energy consumption. A Mixed Integer Non-Linear Programming (MINLP) model is formulated to optimize swing line flows and processing equipment utilization. This allows the systematic identification of optimal operating points, as opposed to current common practices, which are largely based on heuristics.
This paper proposes a methodology to formulate and solve this problem. It describes the level of fidelity used to represent physical process units. This varies between use of detailed first-principles models for certain equipment to a more simplified representation elsewhere. This is done systematically based on the overall impact on the solutionâs accuracy and robustness. This results in minimizing energy consumption while meeting oil production targets without added investment.