Modeling for the optimization of layout scenarios of cluster manifolds with pipeline end manifolds

• A mathematical model for the optimal layout of cluster manifolds with PLEMs is proposed.
• A dedicated algorithm of the model through in-house routine in MATLAB is developed.
• Simulations are performed to demonstrate the validity of proposed model and its algorithm.
• The optimal layout of cluster manifolds with PLEMs can be obtained, which can provide the quantified references to engineers in real engineering.

The pipeline end manifold (PLEM) is an important subsea facility, which can greatly reduce the cost and risk of the development scenarios of deepwater oil and gas fields by declining the number of export pipelines and risers. However, the employment of PLEMs is a multidiscipline task involving substantial financial and technical factors. Due to various uncertainties of influencing factors, the evaluation process may take several months or years by the engineers with rich project experience. Thus, how to develop quantified reference tools using mathematical models to assist engineers in efficiently making their crucial decisions is essential. In this paper, the optimization of the layout scenarios of cluster manifolds with PLEMs is discussed, where a proposed mathematical model and its dedicated algorithm are illustrated. The optimal solution at the lowest cost can be obtained through in-house routine in MATLAB, including the optimal layout scenario, the number and locations of PLEMs, and the connection relations. Besides, the numerical simulations are performed to demonstrate the validity of the proposed mathematical model and its algorithm. The results show that this optimization layout problem in engineering can be described accurately by the presented mathematical model and the convergence rate of the given algorithm is efficient.