Optimal Operation of Subsea and Onshore Oil Transmission Pipeline

Abstract

Peng, S.-B.; Liu, Y.; Xu, L.; Zhu, Q.-Y., and Amizi M., 2019. Optimal operation of subsea and onshore oil transmission pipeline. In: Gong, D.; Zhu, H., and Liu, R. (eds.), Selected Topics in Coastal Research: Engineering, Industry, Economy, and Sustainable Development. Journal of Coastal Research, Special Issue No. 94, pp. 475–479. Coconut Creek (Florida), ISSN 0749-0208.Pipeline is one of the most important means of oil and gas transportation, more and more subsea pipelines have been built these years. As the subsea and onshore crude oil transmission pipelines were laid many years ago, the oil pump combination schemes are complicated, which leads to high energy consumption and excessive cost in the pipeline operation. Concerning this problem, based on parameters of the pipeline and crude oil, an economical operation mathematical model for continuous transportation crude oil pipelines is set up, which taking the minimum energy consumption as the objective function, the pump combination scheme and inlet temperature of heating station as the decision variables. According to the characteristics of the model, Tabu search algorithm is used to solve the mathematical model, and an optimization software is developed by C program. Based on actual operating data, the operation scheme of a crude oil pipeline is optimized by the software. Comparison of energy consumption after optimization against those from results before optimization is illustrated. From the optimal results, it can be seen that the total operation cost after optimization is only 81.5% as before in winter, the effect is significant. Although the structure of subsea pipelines is different from onshore pipelines, the hydraulic and thermodynamic calculation methods are the same, and the optimal operation method can be used for both onshore and subsea pipelines.