Riser-Soil-Fluid Interactions for Steel Catenary Risers
钢悬链线立管的立管-土壤-流体相互作用
基本信息
- 批准号:RGPIN-2019-04129
- 负责人:
- 金额:$ 2.26万
- 依托单位:
- 依托单位国家:加拿大
- 项目类别:Discovery Grants Program - Individual
- 财政年份:2021
- 资助国家:加拿大
- 起止时间:2021-01-01 至 2022-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Steel catenary risers (SCRs), comprised of thick-walled steel pipes and attached in a catenary shape from a floating system to the seabed, are widely used in offshore oil and gas field developments. SCRs must have sufficient strength to sustain significant fatigue loads caused by harsh ocean environments and the riser operational loads. Accurate prediction of the SCR fatigue life in the touchdown area, where the catenary riser departs from the seabed towards the floating system, is one of the most challenging design issues. There are several complex interactive mechanisms between the three main domains, i.e., riser, soil, and seawater. This leads to deep penetration of the SCR into the seabed and a significant influence on the fatigue life. Advanced riser-seabed interaction models have been developed in recent years to simulate riser penetration into the seabed and its influence on riser fatigue. However, previous models have typically only considered two domains of interaction, i.e., the soil and the riser. The detailed influence of seawater around the riser as the third domain has often been neglected. In addition, past models generally suffer from shortcomings and inconsistencies in the explicit modeling of the trench and premature stabilization of the embedment. Recent studies have strived to develop more accurate and comprehensive models to better predict the mechanisms contributing to trench formation, such as plastic soil deformation due to cyclic riser-soil interaction, and soil erosion due to combined vortices generated by subsea currents, cyclic riser oscillations, and riser-fluid interactions. In this research program, a new riser-soil-fluid interaction model will be developed to address the shortcomings of existing riser-soil interaction models and incorporate the effects of seawater in riser-seabed interactions, trench formation, and consequently the SCR fatigue performance. The numerical models will be validated against past published data and applied to a global SCR system to predict the ultimate trench geometry under a range of environmental and operational loads. Also, a new methodology will be developed for incorporation of the trench effects into the SCR fatigue analysis. This research program aims to improve the safety, integrity, and cost effectiveness of SCRs in the development of offshore fields. Considering the offshore field developments in Newfoundland and worldwide, this research has significant potential economic benefits both locally in Newfoundland and globally. Also, highly qualified personnel will be trained in a multidisciplinary environment while gaining valuable skills in the development of advanced engineering models, simulation tools, and methodologies.
钢制悬链线立管(scr)是一种由厚壁钢管组成的悬链线式立管,从浮式系统连接到海底,广泛应用于海上油气田开发。scr必须具有足够的强度,以承受恶劣海洋环境和立管运行载荷造成的显著疲劳载荷。在接触网立管从海床走向浮式系统的着陆点,准确预测SCR的疲劳寿命是最具挑战性的设计问题之一。这三个主要领域(即上升管、土壤和海水)之间存在多种复杂的相互作用机制。这导致SCR深入海底,并对疲劳寿命产生重大影响。近年来发展了先进的隔水管-海床相互作用模型来模拟隔水管侵入海床及其对隔水管疲劳的影响。然而,以前的模型通常只考虑了两个相互作用的领域,即土壤和上升管。立管周围海水作为第三域的具体影响往往被忽略。此外,以往的模型在对海沟的显式建模和埋地的过早稳定方面普遍存在缺陷和不一致。最近的研究一直在努力开发更准确、更全面的模型,以更好地预测海沟形成的机制,例如由隔水管-土壤循环相互作用引起的土壤塑性变形,以及由海底水流、隔水管循环振荡和隔水管-流体相互作用产生的联合涡引起的土壤侵蚀。在本研究项目中,将开发一种新的隔水管-土壤-流体相互作用模型,以解决现有隔水管-土壤相互作用模型的不足,并将海水对隔水管-海底相互作用、海沟形成以及SCR疲劳性能的影响纳入其中。数值模型将根据过去公布的数据进行验证,并应用于全球SCR系统,以预测在一系列环境和操作载荷下的最终沟槽几何形状。此外,将开发一种新的方法,将沟槽效应纳入SCR疲劳分析。该研究项目旨在提高海上油田开发中scr的安全性、完整性和成本效益。考虑到纽芬兰和世界范围内的海上油田开发,这项研究在纽芬兰当地和全球都具有显著的潜在经济效益。此外,高素质的人才将在多学科环境中接受培训,同时获得开发先进工程模型、仿真工具和方法的宝贵技能。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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ShiriGhalehJugh, Hodjat其他文献
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{{ truncateString('ShiriGhalehJugh, Hodjat', 18)}}的其他基金
Riser-Soil-Fluid Interactions for Steel Catenary Risers
钢悬链线立管的立管-土壤-流体相互作用
- 批准号:
RGPIN-2019-04129 - 财政年份:2022
- 资助金额:
$ 2.26万 - 项目类别:
Discovery Grants Program - Individual
Response of subsea pipelines to ice-induced geohazards
海底管道对冰引起的地质灾害的响应
- 批准号:
513925-2017 - 财政年份:2021
- 资助金额:
$ 2.26万 - 项目类别:
Collaborative Research and Development Grants
Riser-Soil-Fluid Interactions for Steel Catenary Risers
钢悬链线立管的立管-土壤-流体相互作用
- 批准号:
RGPIN-2019-04129 - 财政年份:2020
- 资助金额:
$ 2.26万 - 项目类别:
Discovery Grants Program - Individual
Response of subsea pipelines to ice-induced geohazards
海底管道对冰引起的地质灾害的响应
- 批准号:
513925-2017 - 财政年份:2020
- 资助金额:
$ 2.26万 - 项目类别:
Collaborative Research and Development Grants
Riser-Soil-Fluid Interactions for Steel Catenary Risers
钢悬链线立管的立管-土壤-流体相互作用
- 批准号:
DGECR-2019-00414 - 财政年份:2019
- 资助金额:
$ 2.26万 - 项目类别:
Discovery Launch Supplement
Riser-Soil-Fluid Interactions for Steel Catenary Risers
钢悬链线立管的立管-土壤-流体相互作用
- 批准号:
RGPIN-2019-04129 - 财政年份:2019
- 资助金额:
$ 2.26万 - 项目类别:
Discovery Grants Program - Individual
Response of subsea pipelines to ice-induced geohazards
海底管道对冰引起的地质灾害的响应
- 批准号:
513925-2017 - 财政年份:2019
- 资助金额:
$ 2.26万 - 项目类别:
Collaborative Research and Development Grants
Response of subsea pipelines to ice-induced geohazards
海底管道对冰引起的地质灾害的响应
- 批准号:
513925-2017 - 财政年份:2018
- 资助金额:
$ 2.26万 - 项目类别:
Collaborative Research and Development Grants
Response of subsea pipelines to ice-induced geohazards
海底管道对冰引起的地质灾害的响应
- 批准号:
513925-2017 - 财政年份:2017
- 资助金额:
$ 2.26万 - 项目类别:
Collaborative Research and Development Grants
Reliability of Drag Anchors for Catenary Mooring Systems in Newfoundland Offshore
纽芬兰近海悬链线系泊系统拖曳锚的可靠性
- 批准号:
521712-2017 - 财政年份:2017
- 资助金额:
$ 2.26万 - 项目类别:
Engage Grants Program
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