Recent advances in offshore geotechnics for deep water oil and gas developments
Recent advances in offshore geotechnics for deep water oil and gas developments
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DOI：
10.1016/j.oceaneng.2010.10.021
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发表时间：
2011-05
影响因子：
5
通讯作者：
M. Randolph;C. Gaudin;S. Gourvenec;D. White;N. Boylan;M. Cassidy
中科院分区：
文献类型：
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作者：
M. Randolph;C. Gaudin;S. Gourvenec;D. White;N. Boylan;M. Cassidy
本文概述了与深水油气开发相关的岩土分析和设计的最新进展。一般来说，深水中的海床由柔软的、轻度过度固结的、细颗粒的沉积物组成，这些沉积物必须支撑海底或锚定在海底的各种基础设施。一个特别的挑战往往是基础设施在安装或运行期间的流动性，以及随之而来的海底土壤的扰动和愈合，导致海底地形和强度的变化。在这些条件下，审查了海上设施岩土工程的新方面，包括：新的设备和技术来表征海底；浅裙边基础承载力的屈服函数法新型系泊浮式设施锚固系统管道、钢悬链线立管与海底的相互作用；潜艇滑梯及其对基础设施的影响。给出了复杂物理和数值模拟的实例结果。
The paper presents an overview of recent developments in geotechnical analysis and design associated with oil and gas developments in deep water. Typically the seabed in deep water comprises soft, lightly overconsolidated, fine grained sediments, which must support a variety of infrastructure placed on the seabed or anchored to it. A particular challenge is often the mobility of the infrastructure either during installation or during operation, and the consequent disturbance and healing of the seabed soil, leading to changes in seabed topography and strength. Novel aspects of geotechnical engineering for offshore facilities in these conditions are reviewed, including: new equipment and techniques to characterise the seabed; yield function approaches to evaluate the capacity of shallow skirted foundations; novel anchoring systems for moored floating facilities; pipeline and steel catenary riser interaction with the seabed; and submarine slides and their impact on infrastructure. Example results from sophisticated physical and numerical modelling are presented.