Studies On The FPSO Production System Of Offshore Marginal Fields At Shengli Oilfield

After ten years of development at Shengli Chengdao oilfields, more than 100 Wellhead platform,150 km submarine pipeline and nearly 200 km submarine cable have been built. Chengdao field have built the main regional offshore oil and gas gathering system with ZX I, II platform-centric, and the Eastern offshore oil and gas field gathering system with CB30A-centricas. With the deepening of Chengdao oilfields' exploration and development, a lot of Marginal Fields have been found outside the main regional. These Marginal Fields are more than 10km from the main regional and lower reserves. If using a general development mode, the technical and economic problems exist on both. Therefore, given the current difficulties encountered in the development of Chengdao oilfields, after extensive research, a small scale FPSO has been proposed for developing these Marginal Fields in this paper, which can reduce the engineering investment.The offshore Marginal Fields of Shengli Chengdao oilfields is studied in this paper, and the following five aspects are mainly involved:(1)studied the Oil and gas processing technology, the use of natural gas and the equipment layout on the deck of the FPSO. (2)According to the design capacity and oil and gas properties, the process calculation of oil and natural gas processing system, venting system, heat medium systems and equipment selection have been completed. (3) The single well platform architecture for the offshore marginal fields, has been designed, including the lower part of pile foundation topside jacket structure. The static analysis and vibration characteristics of the platform have been completed. (4)Based on the weighted center concept of connected graph in graph theory, the optimization model of FPSO location has been built, and the best FPSO mooring location has been determined. A topology optimization model with the objective of minimizing the total length of pipe has been established, and been solved by the kruskal algorithm. (5)Using the PIPIEPHASE simulated the hydraulic and thermal conditions of the network, and checking whether the hydraulic and thermal conditions meet the requirements.