Microbiologically influenced corrosion in floating production systems

2018 ◽  
Vol 39 (3) ◽  
pp. 165 ◽  
Author(s):  
Laura Machuca Suarez ◽  
Anthony Polomka
Keyword(s):  
Production Systems ◽  
Microbiologically Influenced Corrosion ◽  
Equipment Failure ◽  
Chemical Treatments ◽  
Corrosion Rates ◽  
Increased Risk ◽  
Offshore Oil Production ◽  
Water Cut ◽  
Offshore Oil

Microbiologically influenced corrosion (MIC) represents a serious and challenging problem in Floating, Production, Storage and Offloading vessels (FPSOs), one of the most common type of offshore oil production facilities in Australia. Microorganisms can attach to metal surfaces, which under certain conditions, can result in corrosion rates in excess of 10 mm per year (mmpy) leading to equipment failure before their expected lifetime. Particularly, increasing water cut (ratio of water vs. total fluids produced), normally resulting from the age of the assets, results in an increased risk of MIC. This paper provides an overview of causative microorganisms, their source of contamination and the areas within FPSOs that are most prone to MIC. Although mitigation practices such as chemical treatments, flushing and draining and even cathodic protection are effective, MIC can still occur if the systems are not properly monitored and managed. A case study is presented that describes the microorganisms identified in a FPSO operating in Australia suspected of having MIC issues.

Stability solver for offshore oil production systems

2018 ◽  
Vol 171 ◽  
pp. 993-1006 ◽  
Author(s):  
Ivanilto Andreolli ◽  
Gabriel Romualdo de Azevedo ◽  
Jorge Luis Baliño
Keyword(s):  
Production Systems ◽  
Oil Production ◽  
Offshore Oil Production ◽  
Offshore Oil

“Whale Deaths” Are Unnatural

2016 ◽  
Vol 38 (6) ◽  
pp. 746-775 ◽  
Author(s):  
Sylvester Senyo Ofori-Parku
Keyword(s):  
Oil Production ◽  
Folk Culture ◽  
Advocacy Organizations ◽  
Environmental Advocacy ◽  
Offshore Oil Production ◽  
Local Meaning ◽  
Fish Harvest ◽  
Meaning System ◽  
Offshore Oil

The past several decades have seen a shift in environmental and risk communication that emphasizes harnessing local knowledge to enhance environmental advocacy. As a result, one would expect local advocacy organizations to manifest this shift. Using Friends of the Nation (FoN; a Ghanaian local advocacy organization) as a case study, this research examines how FoN is constructing offshore oil production risks. The study found that FoN uses “whale deaths” as an exemplar of ecological risks associated with offshore oil production, even though in Ghanaian folk culture coastal communities view whale deaths as signs of bumper fish harvest. The article argues that the disconnect between the dominant frame and local meaning system could be explained in terms of FoN’s policymakers-facing as opposed (or in addition) to community residents-facing engagement approach. Recommendations for environmental advocacy are discussed.

Bio-inspired algorithms for the optimization of offshore oil production systems

2012 ◽  
Vol 91 (10) ◽  
pp. 1023-1044 ◽  
Author(s):  
Ian Nascimento Vieira ◽  
Beatriz Souza Leite Pires Lima ◽  
Breno Pinheiro Jacob
Keyword(s):  
Production Systems ◽  
Oil Production ◽  
Offshore Oil Production ◽  
Offshore Oil

Flexible Pipe Integrity Management

2003 ◽  
Author(s):  
Luiz Souza ◽  
Salvador Filho ◽  
Marcos Carpigiani ◽  
Jeter Freitas
Keyword(s):  
Composite Structures ◽  
Production Systems ◽  
Flexible Pipe ◽  
Oil Companies ◽  
Long Period ◽  
Flexible Pipes ◽  
Offshore Oil Production ◽  
Integrity Management ◽  
Offshore Oil ◽  
Production Industry

At present, flexible pipes are used worldwide to conduct several fluids within the offshore oil production industry. These flexible pipes are complex composite structures made up of several plastic and steel layers. They are intended to work for a long period of time, something around 20 years. Although the flexible pipes behavior is satisfactory in most applications, they are susceptible to simple damages, for example on the external sheath, which much reduces their service life. The offshore inspection activities are extremely expensive and, given that, these activities need to be very well oriented in order to be effective. This paper describes the Risk Based Inspection Methodology, which is a helpful applicable tool in the integrity management of several flexible pipe systems, allowing to concentrate the efforts where they are really needed. This methodology may be used by the oil companies to reduce overall costs and enhance safety and integrity of the production systems.

Bending Stiffeners: A Parametric Structural Analysis

2008 ◽  
Author(s):  
Jose´ R. de Souza ◽  
Roberto Ramos
Keyword(s):  
Structural Analysis ◽  
Production Systems ◽  
Variable Coefficients ◽  
Compliant Structure ◽  
Offshore Oil Production ◽  
Linear Differential ◽  
Normative Issues ◽  
Gradual Variation ◽  
Offshore Oil ◽  
Element Discretizations

The bending stiffeners discussed in this paper are ancillary structural components installed on flexible lines at their connections with floating units in offshore oil production systems. The configuration of these accessories must provide the installation with a gradual variation of the bending stiffness near the line’s attaching point, smoothing the curvature and avoiding that the structural bending limit of the flexible line be exceeded, and thus reducing the stress field of the compliant structure therein fixed. Generally modeled as having a simple conical shape, in practice, however, bending stiffeners geometries are not so simple. Indeed, units consisting of four different sections are common. This paper presents a parametric structural analysis of these components by means of an analytically formulated model, which results in a second order non-linear differential equation with variable coefficients. The ensuing mathematical boundary value problem is solved numerically with a code developed in Matlab®, using an internal program based on a collocation method — as opposed to a shooting method. Bending stiffener design and normative issues are also briefly discussed. Finally, solutions obtained previously both analytically and by finite element discretizations are used to validate the analytical solutions obtained herein.

Optimization of well product pumpless transportation under offshore oil production conditions

2017 ◽  
pp. 140-142
Author(s):  
A.G. Akhmadeev ◽  
◽  
Pham Thanh Vinh ◽  
Bui Trong Han ◽  
Le Huu Toan ◽  
...  
Keyword(s):  
Oil Production ◽  
Offshore Oil Production ◽  
Offshore Oil ◽  
Production Conditions
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