海上油气开采钻井平台运动响应性能选型研究

摘要

The drilling platform is easy to be affected by wave in the marine environment,comparative analysis of comprehensive performance for different configurations platform can choose a better performance of the platform,which can effectively reduce the impact by waves.Based on the system modeling,the numerical simulation method is used to predict the motion response performance of each platform,combined with spectral analysis method for comprehensive analysis and evaluation.The results show that the number of floating bodies is unchanged of the semi-submersible drilling platform,with the increase of the number of columns,the natural cycle of the platform presents a decreasing trend;Type Ⅰ and Ⅳ platforms have a smaller heave response peak;the heave response of the platform has obvious wave frequency characteristics;under lateral wave,type Ⅰ,Ⅱ and Ⅲ platforms with the increase of the number of columns,the roll response increased significantly.Comprehensive numerical simulation results show that the type Ⅰ platform can be used as the optimal selection.%钻井平台在海洋环境中易受到波浪作用而影响正常作业,对不同构型的平台进行综合运动性能对比分析,可选择出性能更优的平台,有效降低波浪对性能的影响.通过系统的建模,同时采用数值仿真的方法准确预报各平台的运动响应性能,结合谱分析方法进行综合分析评价.结果显示,半潜式钻井平台在浮体数不变的情况下,随着平台立柱数增加,平台固有周期呈现递减的趋势;型一、型四平台有较小的垂荡响应峰值;所研究各平台垂荡响应具有明显的波频特性;在横浪作用下,型一、型二、型三平台随着立柱数的增加,横摇响应明显增大.综合数值仿真结果可得,型一平台可作为最优选型,在设计时可参考借鉴.