Coupling Response of Heave and Moonpool Water Motion of A Truss Spar Platform in Random Waves

This paper presents the heave responses and the moonpool water motions of a truss Spar platform with semi-closed moonpool in random waves. A 2-DOF（degree of freedom） coupling dynamical equations of the platform heave and vertical motions of the moonpool water are derived. The linear wave theory is used to simulate the random waves. The response statistical values and the power spectrums are calculated to analyze the mutual influences between the platform heave and the moonpool water motions for different opening ratios of the moonpool. The effect of coupling parameters on the platform heave and the moonpool water motions are analyzed. The results show that motions of the moonpool water significantly affected the platform heave when the characteristic wave period is far away from the natural period of the platform heave, and different moonpool opening ratios lead to different heave amplitudes of the platform. In the actual design, an optimized moonpool opening ratio can be designed to reduce heave motions of the platform.

Modeling the Pressure Distribution and the Changes of Water Level around the Offshore Platforms Exposed to Waves, Using the Numerical Model of Flow 3D

The humans’ need to use the oceans for exploration and extraction of oil has led to the development of engineering science in the field of offshore structures. Since it’s important to examine the offshore structures from different aspects and perspectives, we would have to evaluate many different parameters about them. So categorizing these parameters can help to perform their related analysis with more accuracy and more details. Due to the efficient force it exerts on the structure, the pressure distribution around every marine or hydraulic structure has a significant importance, and it even accounts for one of the dominant issues in designing and building of such structures. In the present study, an oil platform located in Phase 15 of South Pars oil fields, located in the Persian Gulf waters, has been analyzed using the FLOW 3D software. The outputs indicate that the pressure of water is distributed almost hydrostatically with the depth, and its maximum reaches 0.6 MPa at the bottom.

Parametric Study on the Behavior of An Innovative Subsurface Tension Leg Platform in Ultra-Deep Water

This study focuses on a new technology of Subsurface Tension Leg Platform （STLP）, which utilizes the shallow- water rated well completion equipment and technology for the development of large oil and gas fields in ultra-deep water （UDW）. Thus, the STLP concept offers attractive advantages over conventional field development concepts. STLP is basically a pre-installed Subsurface Sea-star Platform （SSP）, which supports rigid risers and shallow-water rated well completion equipment. The paper details the results of the parametric study on the behavior of STLP at a water depth of 3000 m. At first, a general description of the STLP configuration and working principle is introduced. Then, the numerical models for the global analysis of the STLP in waves and current are presented. After that, extensive parametric studies are carried out with regarding to SSP/tethers system analysis, global dynamic analysis and riser interference analysis. Critical points are addressed on the mooring pattern and riser arrangement under the influence of ocean current, to ensure that the requirements on SSP stability and riser interference are well satisfied. Finally, conclusions and discussions are made. The results indicate that STLP is a competitive well and riser solution in up to 3000 m water depth for offshore petroleum production.

Parametric Dimensional Analysis on the Structural Response of An Innovative Subsurface Tension Leg Platform in Ultra-Deep Water

The innovative Subsurface Tension Leg Platform(STLP), which is designed to be located below Mean Water Level(M.W.L) to minimize direct wave loading and mitigate the effect of strong surface currents, is considered as a competitive alternative system to support shallow-water rated well completion equipment and rigid risers for large ultra-deep water oil field development. A detailed description of the design philosophy of STLP has been published in the series of papers and patents. Nonetheless, design uncertainties arise as limited understanding of various parameters effects on the structural response of STLP, pertaining to the environmental loading, structural properties and hydrodynamic characteristics. This paper focuses on providing quantitative methodology on how each parameter affects the structural response of STLP, which will facilitate establishing the unique design criteria as regards to STLP. Firstly, the entire list of dimensionless groups of input and output parameters is proposed based on VaschyBuckingham theory. Then, numerical models are built and a series of numerical tests are carried out for validating the obtained dimensionless groups. On this basis, the calculation results of a great quantity of parametric studies on the structural response of STLP are presented and discussed in detail. Further, empirical formulae for predicting STLP response are derived through nonlinear regression analysis. Finally, conclusions and discussions are made. It has been demonstrated that the study provides a methodology for better control of key parameters and lays the foundation for optimal design of STLP. The obtained conclusions also have wide ranging applicability in reference to the engineering design and design analysis aspects of deepwater buoy supporting installations, such as Grouped SLOR or TLR system.

智慧灌溉大数据管理平台设计与应用

以粗放型为主的漫灌方式浪费水资源,探索高效节水农业灌溉意义重大。本研究研制了集数据采集、数据管理、数据可视化、分析决策和远程管理为一体的智慧灌溉大数据管理平台,旨在以数字化管理与智能化控制方式提升水资源利用效率。平台利用嵌入式、物联网、互联网、3S(GIS、GPS、RS)等技术,采取“1+1+N”的设计模式,构建作物需水预报模型与灌溉决策模型,基于B/S构架和Java语言,设计了1个灌溉数据中心、1个灌溉数据管理系统、4个应用系统,打造了智慧灌溉大数据管理平台。平台在河北、河南、山东、江苏等地区设有多个示范基地,汇聚了8个科研小组、24个试验基地的有关多种作物的生长、灌溉、气象、土壤等数据,平均采集数据18829条/天,帮助管理人员摸清家底;集成了多个团队的软件系统和62套物联网设备,及时、定量地呈现了农作物生长状况及环境状态,实现了农作区动态监测,助力生产决策;生成农作物需水预报和灌溉决策方案,完成了远程灌溉目标,并且经过实地试验,验证了自动灌溉的有效性,将灌溉水有效利用系数最高提升了31%以上;形成了大田产业、温室中心、数字科研和区域灌溉等不同专题可视化布局,满足多种农业场景应用需求。为农业生产和跨区域管理提供了便捷工具,为农业灌溉数字化系统搭建和应用提供了参考。

水利大模型的建设思路、构建框架与应用场景初探

发展新质生产力是推动高质量发展的内在要求和重要着力点。推进数字孪生水利建设是推动新阶段水利高质量发展的显著标志和重要路径,模型和知识是数字孪生水利建设的关键所在。因此,按照“需求牵引、应用至上、数字赋能、提升能力”要求,针对水利业务需求融合大模型、水利专业模型和知识而形成“水利大模型”,是发展水利新质生产力的重要引擎。阐述了水利大模型的概念和构建的重要意义,介绍了构建的思路与总体框架,分析了需突破的关键技术,介绍了行业应用场景。研究成果可为人工智能大模型在水利行业落地提供引导和借鉴。

深水半潜式钻井平台水下设备作业虚拟仿真教学平台构建

深水油气钻井与陆地及浅水的同类作业存在显著差异,给海洋油气工程专业学生的现场实习、实践带来了诸多困难。为加深学生对深水油气钻井工程装备的认知,采用虚拟仿真技术,构建还原度高、实战性强的深水半潜式钻井平台水下设备作业虚拟仿真教学平台,实现隔水管运移存储及下放、隔水管与上部升沉补偿装置及底部立管总成的连接、水下防喷器结构及安装等功能,帮助学生在无需前往深水平台的前提下、在虚拟环境中系统掌握水下设备的操控方法及作业程序,提升学生的深水钻井作业的工程实践能力。

浮式平台多用途供水系统设计

文章分析了常规水泵系统设计方案的优缺点及适应性,针对在特殊型式的浮式平台中常规方案无法满足设计要求的问题,提出了使用长轴泵系统及自吸泵系统的解决方案,给出相应的系统计算方法和设计要点,包括系统控制逻辑、管系设计、阀门类型、泵吸入性能计算、防汽蚀措施及设备布置方案等,为各类浮式平台及船舶的供水系统设计提供了参考。

DYNAMIC RESPONSE ANALYSIS OF PLATFORM-CYLINDERGROUP FOUNDATION DUE TO IMPACT BY WATER WAVE FLOW

This paper deals. with the problem of dynamic response of platform-cylinder group foumdation. Dynamic interaction of cylinder group foudation-water-soil is taken into account and the analysis of dynamic response to excitation of water wave force is given by analytic method ..The numerical examples are presented and the influence of systent’s parameters on the dynamic behaviour is discussed.

风浪联合作用下深水半潜平台耐波性能的数值模拟

通过数值模拟方法,研究风浪联合作用下深水半潜平台的耐波性能。该方法通过建立风速与波浪相干函数模型,利用该模型获得当前深水半潜平台不同工况下风速与海浪的关系,再计算风浪联合作用下深水半潜平台的海浪作用力和风作用力,以2个数值为基础,构建深水半潜平台耐波性能数值模拟模型,在不同情况下模拟风浪联合作用下深水半潜平台耐波性能。实验结果表明:该方法可在不同波浪周期时,模拟风浪联合作用下深水半潜平台的横荡和垂荡数值,在波浪周期较小时,垂荡与横荡数值也较小,深水半潜平台的耐波能力较强;风浪角越大,在波浪周期相同时深水半潜平台的垂向弯矩数值越大,其耐波能力则较小。

海上平台三甘醇脱水装置故障分析及工艺优化

目的解决某海上平台三甘醇脱水装置无法达到脱水要求的问题。方法基于现场实际生产数据,采用HYSYS软件进行该工艺系统的模拟分析,找出该系统运行问题的原因。结果脱水塔入口天然气中水含量过高是影响脱水系统效果的主要因素,改造方案应考虑入口过滤分离器和重沸器改造两方面。结合平台实际情况,最终确定改造方案为更换入口过滤分离器滤芯与重沸器电加热器。改造后,在表压5.2 MPa下的干气水露点从6℃降至-23℃,达到预期效果,且为后续扩容预留了操作空间。结论该海上平台三甘醇脱水装置处理量无法达到设计值的原因可能是入口过滤分离器性能不达标导致脱水塔入口天然气中水含量过高,建议在进行三甘醇脱水装置工艺设计时,严控入口过滤分离器处理指标,并根据入口过滤分离器处理指标配套三甘醇脱水装置。

海洋平台潜海水电机绝缘失效解决方法探讨

针对目前国产电动海水提升泵电机绝缘失效率高、质量不够稳定的问题,结合实际案例,通过温度场仿真分析等方法,得出潜海水电机绝缘失效的主要原因包括绕组线选型缺陷、内部散热不足、密封性能差和缺少温度监控。针对上诉原因,逐条提出可行的改进方法,提高电动潜海水泵的产品质量。

深水导管架平台波浪动力响应及参数敏感性分析

考虑到300 m级导管架平台的自振周期与自升式平台极为接近,自升式平台的波浪动力响应分析方法在理论上可应用于深水导管架平台,但应用前需要进行参数敏感性分析,采用SACS软件建立300 m级导管架平台有限元模型,结合JONSWAP波浪谱、利用线性叠加法构造满足高斯性条件的随机波浪;基于时域分析法,进行在随机波浪载荷下的结构动力响应分析;采用Winterstein/Jensen方法计算平台基底剪力和倾覆力矩的最可能最大值,以及动力放大系数;对波浪瞬态变化、模拟步长和时长、随机种子等参数对动力放大系数进行敏感性分析,结果表明,动力放大系数对波浪瞬态变化较为敏感、对模拟步长和时长,以及随机种子极为敏感。采用Winterstein/Jensen方法进行深水导管架平台动力响应分析时,基于敏感性分析得出的参数可获得更合理、准确的动力放大系数。

渤海某重质油田采出液短流程回注工艺侧线应用研究

含油废水的处理是海上油气田开采平台运行的关键环节之一。为提高经济效益和油水分离的效率,开发了高效微气浮(AMFD)除油分离器,小型组合纤维聚结(CFC)油水分离器和介质颗粒聚结过滤技术(MPE)分离器。并在中海石油渤海某海上平台进行了小规模连续性工业侧线试验,验证了设备在实际工业应用环境中的油水分离性能。结果表明,相比于平台原处理流程,“AMFD+CFC+MPE”流程总停留时间减少87%,取消了破乳剂和清水剂的使用,同时减少了22%的反向破乳剂使用量,效率提高了74.14%。出水各项指标满足平台回注水标准,处理效果优于平台原流程。

深水浮式平台一体化海洋监测系统发展现状与国产化探索

通过对深水浮式平台一体化海洋监测系统的发展历史以及在我国海洋油气平台上的应用现状进行调研,给出了监测设备具体部署以及国产化设备的研制和示范应用情况。通过对现场监测关键传感器设备、系统集成等核心技术进行国产化现状分析与研究,提出国产化研究方向和建议,为打破国外技术垄断、指导深水浮式平台一体化海洋监测系统进一步开展国产化研制提供了依据。

呼和浩特市黑臭水体预报预警系统平台开发研究

本文以呼和浩特市建成区内7处黑臭水体为研究对象,通过收集黑臭水体相关基础信息数据,运用GIS技术和城市黑臭水体数据采集与评价结合的方法,完成呼和浩特市黑臭水体污染预报预警管理平台开发。实现了基础信息的更新、维护、统计、查询等,提供了城市黑臭水体的数据采集、评价、预警、决策、可视化展示的管理系统,为呼和浩特市巩固黑臭水体治理成效,防止返黑返臭,实现“长制久清”,提供有力的信息技术支撑。

农村水环境治理的难点与智慧水务平台的优势

本文主要探讨了农村水环境治理面临的难点,并提出了智慧水务平台的优势。本文介绍了农村水环境治理的重要性和当前面临的问题。将分析农村水环境治理的难点,包括基础设施不完善、资源匮乏、技术水平低等。文章将介绍智慧水务平台的优势,包括提供数据支持、优化资源配置、智能监测等。最后文章总结了智慧水务平台在农村水环境治理中的应用前景。

设计辅助平台以“陪伴式”模式辅助水域岸线提升设计——以普陀区万里街道大场浦两岸提升设计为例

根据水域岸线基本功能形态以及要素提取,对生活、工业、生态、公共、配套五个功能赋予基础属性、生态属性、社会经济属性、交通属性、规划属性五个属性的评估标准。在评估方法上,包括定性评估与定量评估。定性评估是结合不同段落功能研判所得出的。例如,通过大场浦(交通路——新村路)段落的居住及文化服务功能研判,确立了以人为本的原则,以居民需求为核心出发点。通过大场浦(新村路——富平路)段落的商业配套功能研判,以打造商业服务相结合的公众性与开放性功能为出发点。

矿用水冷永磁防爆电机分水台优化设计

为研究不同冷却水道结构对永磁水冷防爆电动机冷却性能的影响,以永磁水冷防爆电动机为例,按照电机设计的步骤,通过对电机的模拟仿真,提出轴向Z字型水道分水台结构,并对永磁水冷防爆电动机水路进行优化。对电机初始模型建立三维模型,通过有限元多物理场计算,得到电机在额定负载下的温度分布情况,并基于传热学和流体力学,对加入轴向Z字型水道分水台的位置比例、数量2个方面展开研究。对电机进行CFD仿真模拟,利用有限元分析,得到不同情况下电机的温度分布图,结合实际情况与经济分析,得到电机分水台数量为2时冷却结构为最优解。

深圳市水土保持智慧监管平台研发及应用

智慧水土保持是智慧水利建设的重要组成部分,针对当前深圳市水土保持监管中信息化和智慧化程度不高的问题,围绕水土保持监管难题,在智慧水务总体框架的基础上,研发并利用水土保持专业模型、黄泥水溯源要素关系模型等关键技术,搭建包含生产建设项目监督管理、水土流失监测、水土保持生态建设、水土保持决策支持、水土保持信息服务、黄泥水防治等六大业务的深圳市水土保持智慧监管平台,实现水土保持业务全覆盖,为水土保持智慧监管提供技术支撑。结果表明:智慧监管平台有效提高深圳市水土保持监管业务中信息处理能力、应用智慧化程度,可为其他城市的智慧水土保持建设提供参考。