Time-Variant Ultimate Reliability Analysis of Jacket Platforms Considering a New Probabilistic Corrosion Model for the Persian Gulf

2018 ◽  
Vol 140 (6) ◽  
Author(s):  
Hossein Gholami ◽  
Behrouz Asgarian ◽  
Saeed Asil Gharebaghi
Keyword(s):  
Reliability Analysis ◽  
Probabilistic Model ◽  
Persian Gulf ◽  
Structural Integrity ◽  
Actual Condition ◽  
Offshore Platforms ◽  
Gulf Region ◽  
Corrosion Loss ◽  
Reliability Method ◽  
The Persian Gulf

Corrosion is identified as one of the most important deterioration factors for structural integrity of offshore platforms. For reliability analysis of these platforms, a probabilistic model for prediction of long-term corrosion loss as a function of time is essential. The purpose of this study is to propose a novel model for steel corrosion of jacket platforms in the Persian Gulf region. Field measurements for members in seawater are collected and statistically analyzed to identify the probability function for corrosion loss at different times. A new probabilistic model with time-dependent parameters is suggested, based on the statistical analysis results. Application of above-mentioned model in the reliability analysis of jacket platforms is investigated by introducing a new reliability analysis framework. This framework is a general solution for probabilistic analysis of jacket platforms with several stochastic variables which can be used for the platforms with different configuration and loads. In this framework, direct analysis is performed in each stage of first-order reliability method (FORM) instead of using the response surface method which is a common approach to obtaining the required response. This framework is applied to three jackets and the annual probability of failure (Pf) over the platforms service life is computed. Comparison of results revealed that among the years beyond the platform design life, the amount of annual Pf is increased in parabolic function. Also, studying the results is illustrated that in the case of ignoring the corrosion loss as a stochastic variable, Pf is estimated 7% lower than values obtained in actual condition.

A discussion concerning the floor of the northwest Indian Ocean - The recent sedimentary facies of the Persian Gulf region

1966 ◽  
Vol 259 (1099) ◽  
pp. 291-298 ◽  
Keyword(s):  
Indian Ocean ◽  
Coastal Plain ◽  
Persian Gulf ◽  
Barrier Islands ◽  
Sedimentary Facies ◽  
Dune Sand ◽  
Gulf Region ◽  
Marginal Sea ◽  
The Indian Ocean ◽  
The Persian Gulf

The Persian Gulf, which is a shallow marginal sea of the Indian Ocean, is an excellent model for the study of some ancient troughs. It is bordered on the west by the Arabian Precambrian shield and on the east by the Persian Tertiary fold mountains. Persia is an area of extensive continental deposition. It is bordered by a narrow submarine shelf. The deeper trough of the Persian Gulf lying along the Persian Coast seaward of the shelf is floored by marly sediments. East of this, the Arabian shelf is covered with skeletal calcarenites and calcilutites. To the northwest is the Mesopotamian alluvial plain and deltaic lobe. Arabia is bordered on the Persian Gulf littoral by a coastal complex of carbonate environments. Barrier islands, tidal deltas (the site of oolitic calcarenite formation) and reefs protect lagoons where calcilutites, pelletal-calcarenites and calcilutites and skeletal calcarenites and calcilutites are forming. There are Mangrove swamps, extensive algal flats and broad intertidal flats bordering the lagoons and landward sides of the islands. A wide coastal plain, the sabkha, borders the mainland. Here evaporation and reactions between the saline waters percolating from the lagoons, and calcium carbonate deposited during a seaward regression, leads to the production of evaporitic minerals including anhydrite, celestite, dolomite, gypsum and halite. Inland, wide dune sand areas pass into the outwash plains skirting the mountain rim of Arabia.

THREATS TO RESPIRATORY HEALTH IN THE PERSIAN GULF REGION

1991 ◽  
Vol 84 (Supplement) ◽  
pp. 12
Author(s):  
Roscoe C. Young ◽  
Raylinda E. Rachal ◽  
Wavell D. Hodge
Keyword(s):  
Persian Gulf ◽  
Respiratory Health ◽  
Gulf Region ◽  
The Persian Gulf

China, Global Energy, and the Middle East

2007 ◽  
Vol 61 (2) ◽  
pp. 199-218 ◽  
Author(s):  
Steve A. Yetiv ◽  
Chunlong Lu
Keyword(s):  
Persian Gulf ◽  
Policy Recommendations ◽  
Gulf Region ◽  
Arms Sales ◽  
The Past ◽  
Regional Dynamics ◽  
The Future ◽  
Future Policy ◽  
The Persian Gulf ◽  
Economic Ties

China has significantly enhanced its position and interest in the Persian Gulf region over the past 25 years, making it an important newcomer in regional dynamics. Evidence clearly shows that it has expanded, in some cases dramatically, its diplomatic contacts, economic ties, and arms sales to regional states. This represents a novel development which is likely to accelerate in the future as China's dependence on Persian Gulf oil grows. China's rising position in the region has put Beijing and Washington at odds and could generate serious friction points in the future. Policy recommendations are sketched to avoid such an outcome.

Forecasting the differences between various commercial oil prices in the Persian Gulf region by neural network

Energy ◽  
2011 ◽  
Vol 36 (7) ◽  
pp. 3979-3984 ◽  
Author(s):  
Kamyar Movagharnejad ◽  
Bahman Mehdizadeh ◽  
Morteza Banihashemi ◽  
Masoud Sheikhi Kordkheili
Keyword(s):  
Neural Network ◽  
Persian Gulf ◽  
Oil Prices ◽  
Gulf Region ◽  
The Persian Gulf ◽  
Commercial Oil

scholarly journals Qatar's Modern Diplomacy and Al-Jazeera’s Role in Middle East’s Evolutions over the Recent Decades

2016 ◽  
Vol 7 (1) ◽  
pp. 123
Author(s):  
Ansar Amini ◽  
Mehdi Akbarsefat
Keyword(s):  
World War Ii ◽  
Middle East ◽  
Persian Gulf ◽  
International System ◽  
Al Jazeera ◽  
Gulf Region ◽  
The Past ◽  
Political Bargaining ◽  
Effective Role ◽  
The Persian Gulf

Development of information technology and internet today has given the concept of diplomacy a meaning broader than the past. Modern diplomacy is a mixture which has gained a specific position among academic topics. It is worth noting that the modern diplomacy was resulted from the world's changes after the World War II, where governments could no longer be the only players in the international system. The concept of modern diplomacy makes sense in relatively different ways; general diplomacy, real-time diplomacy,Nich diplomacy, etc. But our main focus in the paper is placed on the Jazeera's role in Middle East's evolutions over the recent decades. As a grand manifestation of modern diplomacy in the Middle East during the past decades, Al Jazeera is sometimes considered to be Qatar's foreign policy benchmarks (index), as it has had an effective role in events related to the country's diplomacy from the time it was established. We assume Qatar's political bargaining power in the international system, especially in the Persian Gulf region, as having enhanced over the recent years. In the present paper, therefore, the authors are about to address questions as to how Qatar's modern diplomacy has made it an active country in the Persian Gulf and in the Middle East region as well, and to what extent Al Jazeera's role is deemed to be serious in the recent changes happened in the Middle east. The present research's assumption emphasizes the role of establishment of Al Jazeera Media Channel as a diplomacy-enabling tool after changes were made in Qatar's government structure, a role which obviously affects the Middle East's recent evolutions (Movements and revolutions in Arabian Countries). Analytic-descriptive approach has been used in the present paper.

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