海上油田油轮外输系统优化分析

Optimization analysis on the transportation system of oil tankers for offshore oilfields

对海上油田油轮外输系统进行了分析 ,建立了系统优化的数学模型。选用模矢搜索法、单纯形算法和模拟退火算法三种优化方法进行了计算 ,得出在对某些非线性问题进行优化时 ,利用模拟退火算法和直接最优化方法 (如单纯形法 )相结合 ,既能保证得到全局最优解 ,又能减少计算时间。通过实例计算 ,得出油轮外输系统适用于离岸距离较远、产量较小的油田 ,其外输费用随离岸距离的增加变化非常小 。

The transportation system of oil tankers for offshore oilfields is analysed. An optimization model of the system is established and analyzed by module vector search method, simplex method and simulation annealing algorithm. The global optimal solution is obtained and the calculation time is reduced by using a combination method of simulation annealing algorithm and a kind of direct optimization method (such as simplex method) for solving some nonlinear optimization problems. It can be concluded that this system is applicable for those offshore oilfields with lesser oil output and far from the coast. The cost of transportation rarely changes with the increase of distance away from the coast, and largely increases with the increase of oil output.