An offshore elements layout project consists of positioning oil wells, manifolds and platforms in offshore areas, as well as routing the pipelines that connect these elements. The design process involves a set of restrictions, a great number of decisions and an infinite number of design alternatives. This paper presents a new model to solve this problem based on combining two strategies: divide...

fault tree analysis (fta) as a probabilistic risk assessment (pra) method is used to identify basic causes leading to an undesired event, to represent logical relation of these basic causes in leading to the event, and finally to calculate the probability of occurrence of this event. to conduct a quantitative fta, one needs a fault tree along with failure data of the basic events (bes). someti...

Riser emergency shutdown valves (RESDVs) are an essential risk reduction measure for offshore installations and are a legal requirement under the Pipelines Safety Regulations 1996. The RESDV should isolate the topsides from the well and subsea pipeline in the event of an emergency shutdown, to reduce the inventory for loss of containment or when required for maintenance. RESDV failures, whether...

The buckling analysis of an offshore pipeline refers to the temperature-induced uplift and lateral pipelines by analytical, numerical, experimental means. Thus, current study discusses different research performed on thermal pipe-buckling factors affecting pipeline’s behaviour. consists dependency direction seabed features burial condition; pre-buckling post-buckling load-displacement behaviour...

Background: Offshore lifelines ( i.e ., pipelines and cables) are usually vulnerable to seabed deformations induced by earthquake-triggered geohazards, such as submarine landslides, soil liquefaction, tectonic faulting. Since the complete avoidance of all areas characterized offshore geohazards is not always techno-economically feasible, optimal lifeline route selection deemed necessary for saf...

The application of GIS systems to environmental contexts is well established with a multitude of examples (see Goodchild et al, 1993). It has only recently been applied in coastal and marine environments, which present challenges due to the dynamic nature of the spatial and temporal environment, the lack of data and issues of accuracy and scale (Wright and Bartlett, 2000). It still has not been...

The exploration of offshore gas/oil has been moving to deepwater fields as big reservoirs have been found and technologies have improved. Presently, the most active areas in deepwater gas/oil field development are Africa and the GOM (Gulf of Mexico) in North America. There are many technological challenges in developing deepwater gas/oil fields such as: flow assurance, subsea systems, riser sys...

Slugging flow in offshore oil & gas multi-phase transportation pipelines cause big challenges as the flow regime induces flow and pressure oscillations in the multi-phase pipelines. The negative impacts of the most severe slugs are significant and thus the elimination of slugging flow in the pipelines is a highly investigated topic. To eliminate the slug in an online manner real-time slug detec...

Corrosion of offshore oil and gas pipelines is an important problem that can generate catastrophic failures if not adequately managed. The issues are more important and critical for deepwater pipelines due to complexity of the designs and also due to difficulty in inspection, monitoring, and repair. Pipelines exposed to these severely corrosive environments require the use of corrosion resistan...