油水界面监测是保证储卸油顺利进行,油水置换工艺安全可靠的关键。针对一种新型的深水立柱式Spar钻井生产储卸油平台(spar drilling production storage offloading,简称SDPSO)的特点,在综述储油舱液面监测方法及1:40模型试验液面监测...油水界面监测是保证储卸油顺利进行,油水置换工艺安全可靠的关键。针对一种新型的深水立柱式Spar钻井生产储卸油平台(spar drilling production storage offloading,简称SDPSO)的特点,在综述储油舱液面监测方法及1:40模型试验液面监测方法基础上,对其进行油水界面监测方案研究。使用连续监测与高位/低位警报位置监测相结合的方式是适宜的,考虑到实际应用时的系统安全,对连续监测及高位/低位报警监测须至少设置两种独立的监测方式:连续监测采用流量计及压差法监测,高位/低位警报位置监测采用射线法、电容式方法、振棒物位开关监测。另外考虑到监测系统的可靠性,对每种检测装置需设置备用的监测回路。展开更多
以某油田弃置退役浮式生产储卸油装置(Floating Production Storage and Offloading,FPSO)为研究目标,采用非线性时域动态分析方法考虑不同环境条件组合影响,对FPSO的拖航进行时域下拖缆张力响应和FPSO艏摇运动响应分析。结果表明,在给...以某油田弃置退役浮式生产储卸油装置(Floating Production Storage and Offloading,FPSO)为研究目标,采用非线性时域动态分析方法考虑不同环境条件组合影响,对FPSO的拖航进行时域下拖缆张力响应和FPSO艏摇运动响应分析。结果表明,在给定海况下,被拖物FPSO的拖缆最大张力小于设计破断力,其最大艏摇角度接近30°。在分析过程中系统处于稳定状态,没有出现发散现象。出于保守考虑,在分析中假定拖船固定,给出的计算结果偏保守。展开更多
以某大型浮式生产储卸油装置(Floating Production Storage and Offloading,FPSO)为例,对湿拖和干拖两种方案中的关键考量点进行对比分析,干拖分析主要包括总纵强度分析、绑扎分析和稳性分析,湿拖分析主要包括总纵强度分析、稳性分析和...以某大型浮式生产储卸油装置(Floating Production Storage and Offloading,FPSO)为例,对湿拖和干拖两种方案中的关键考量点进行对比分析,干拖分析主要包括总纵强度分析、绑扎分析和稳性分析,湿拖分析主要包括总纵强度分析、稳性分析和拖船选择。初步分析结果表明这两种拖航方案在技术上均是可行的,后期最终拖航方案的确定还需考虑其他因素,比如项目工期、拖航费用、保险费用、风险分析等。展开更多
为便于深水双层整体式管道终端(Pipeline End Termination,PLET)的安装设计,以海洋石油201船的舷侧下放装置和南海某项目为基础,研究双层整体式PLET舷侧安装的悬挂和下放两个关键阶段的安装分析模型和主要参数。对比悬挂分析等效单层管...为便于深水双层整体式管道终端(Pipeline End Termination,PLET)的安装设计,以海洋石油201船的舷侧下放装置和南海某项目为基础,研究双层整体式PLET舷侧安装的悬挂和下放两个关键阶段的安装分析模型和主要参数。对比悬挂分析等效单层管模型与双层管模型,结果表明此2种建模方法均适用。双层管模型相关接触参数(接触刚度、接触面积、锚固件位置)对海底管道受力影响较小且能输出内外管接触载荷,较适用于安装设计。在下放过程中,管道载荷对PLET的重心位置和附加质量水动力系数较为敏感,在安装设计中需关注。展开更多
Subsea production system has been increasingly used in recent South China Sea offshore developments. With deepwater applications, constituent parts of subsea systems become more complicated and enlarged. Increases on ...Subsea production system has been increasingly used in recent South China Sea offshore developments. With deepwater applications, constituent parts of subsea systems become more complicated and enlarged. Increases on the weight and geometry of each component bring challenges to installations. A recent accomplished deployment on a subsea massive jumper shows the weight and length have been up to 120 tons and 90 m, respectively with sophi- sticated geometry. It is considerably difficult to install heavy and large subsea structures, especially in South China Sea where severe environmental conditions are common. In addition, deepwater deployment may alter natural frequency of the hoisting system and the altered frequency may be close to possible environmental conditions. To deal with the above two issues, traditionally, engineers need to carry out series of complicated numerical analyses which are on case basis and significantly time-consuming. Existing studies focus on the optimization on analysis techniques by conducting laboratory testing and numerical simulations. However, easy-to-use guidance on massive subsea structure installation are somewhat limited. The studies presented in this paper aim to achieve a simplified guidance which can briefly screen the cases subject to axial resonance and provide visible correlations between hoisting system integrity and key installation parameters.展开更多
文摘油水界面监测是保证储卸油顺利进行,油水置换工艺安全可靠的关键。针对一种新型的深水立柱式Spar钻井生产储卸油平台(spar drilling production storage offloading,简称SDPSO)的特点,在综述储油舱液面监测方法及1:40模型试验液面监测方法基础上,对其进行油水界面监测方案研究。使用连续监测与高位/低位警报位置监测相结合的方式是适宜的,考虑到实际应用时的系统安全,对连续监测及高位/低位报警监测须至少设置两种独立的监测方式:连续监测采用流量计及压差法监测,高位/低位警报位置监测采用射线法、电容式方法、振棒物位开关监测。另外考虑到监测系统的可靠性,对每种检测装置需设置备用的监测回路。
文摘以某油田弃置退役浮式生产储卸油装置(Floating Production Storage and Offloading,FPSO)为研究目标,采用非线性时域动态分析方法考虑不同环境条件组合影响,对FPSO的拖航进行时域下拖缆张力响应和FPSO艏摇运动响应分析。结果表明,在给定海况下,被拖物FPSO的拖缆最大张力小于设计破断力,其最大艏摇角度接近30°。在分析过程中系统处于稳定状态,没有出现发散现象。出于保守考虑,在分析中假定拖船固定,给出的计算结果偏保守。
文摘以某大型浮式生产储卸油装置(Floating Production Storage and Offloading,FPSO)为例,对湿拖和干拖两种方案中的关键考量点进行对比分析,干拖分析主要包括总纵强度分析、绑扎分析和稳性分析,湿拖分析主要包括总纵强度分析、稳性分析和拖船选择。初步分析结果表明这两种拖航方案在技术上均是可行的,后期最终拖航方案的确定还需考虑其他因素,比如项目工期、拖航费用、保险费用、风险分析等。
文摘为便于深水双层整体式管道终端(Pipeline End Termination,PLET)的安装设计,以海洋石油201船的舷侧下放装置和南海某项目为基础,研究双层整体式PLET舷侧安装的悬挂和下放两个关键阶段的安装分析模型和主要参数。对比悬挂分析等效单层管模型与双层管模型,结果表明此2种建模方法均适用。双层管模型相关接触参数(接触刚度、接触面积、锚固件位置)对海底管道受力影响较小且能输出内外管接触载荷,较适用于安装设计。在下放过程中,管道载荷对PLET的重心位置和附加质量水动力系数较为敏感,在安装设计中需关注。
文摘Subsea production system has been increasingly used in recent South China Sea offshore developments. With deepwater applications, constituent parts of subsea systems become more complicated and enlarged. Increases on the weight and geometry of each component bring challenges to installations. A recent accomplished deployment on a subsea massive jumper shows the weight and length have been up to 120 tons and 90 m, respectively with sophi- sticated geometry. It is considerably difficult to install heavy and large subsea structures, especially in South China Sea where severe environmental conditions are common. In addition, deepwater deployment may alter natural frequency of the hoisting system and the altered frequency may be close to possible environmental conditions. To deal with the above two issues, traditionally, engineers need to carry out series of complicated numerical analyses which are on case basis and significantly time-consuming. Existing studies focus on the optimization on analysis techniques by conducting laboratory testing and numerical simulations. However, easy-to-use guidance on massive subsea structure installation are somewhat limited. The studies presented in this paper aim to achieve a simplified guidance which can briefly screen the cases subject to axial resonance and provide visible correlations between hoisting system integrity and key installation parameters.
