Decommissioning of Offshore Oil and Gas Facilities: A Comparative Study Between Malaysia Practices and International Standards

2021 ◽  
Author(s):  
Shaleni Kumar ◽  
Mohd-Akmal Sidek ◽  
Augustine Agi ◽  
Radzuan Junin ◽  
Mohd-Zaidi Jaafar ◽  
...  
Keyword(s):  
Oil And Gas ◽  
Information Management System ◽  
Legal Framework ◽  
Residual Risk ◽  
International Standards ◽  
Matrix Analysis ◽  
Decision Matrix ◽  
Offshore Installations ◽  
International Regulations ◽  
Offshore Oil And Gas

Abstract Regulations for decommissioning are bound by international and domestic regulations. There are numerous decommissioning concepts to choose from, such as complete or partial removal, structure severance options which leave behind shell mounds and drill cuttings. However, in several international regulations there appears to be little clarity and/or opposing ideologies. Malaysia and Thailand have accessible resources for decommissioning legislation or guidelines in South East Asia. Nevertheless, they are differences in the regulations of these countries regarding the legal framework, the technical, financial and environmental framework. In this study, the feasibility of existing framework in decommissioning process of offshore installations or structures in Malaysia was studied and compared with international practices. Decision matrix analysis was used to systematically identify, analyse, and rate the performance of relationships between sets of values and information. Moreover, the scale of decommissioning activities over the next years, the data and information obtained were analysed using descriptive statistics approach. The results indicated that Thailand had the best decommissioning regulations because they have strict regulation in decommissioning. Most of the regulations covering the technical section are similar within all countries studied. Finally, recommendations given are from the aspects of frameworks on in-situ full or partial decommissioning, clarity on liabilities and residual risk management, financial security, residual risk funds, workflow optimisation, information management system, and waste management.

Potential Galloping Motions of Piggyback Pipeline Geometries in Strong Currents

2012 ◽  
Author(s):  
Adeshina Elegbede ◽  
Ove T. Gudmestad
Keyword(s):  
Oil And Gas ◽  
Angle Of Attack ◽  
Oil And Gas Industry ◽  
Electrical Heating ◽  
Equivalent Diameter ◽  
Flow Induced Vibration ◽  
Gas Industry ◽  
Offshore Installations ◽  
Offshore Oil And Gas ◽  
Offshore Oil

Piggyback configurations of pipelines, such as a Direct Electrical Heating (DEH) cable mounted on production flowlines, are becoming a common occurrence in the offshore oil and gas industry and they have been observed to excite into a type of flow-induced vibration called galloping in the presence of strong currents at free span locations. This work was aimed at studying potential flow induced galloping vibrations of piggyback type of pipelines commonly used on offshore installations in the oil and gas industry. Tests were carried out in a 12m long, 0.7m wide and 1.2m deep current flume tank located at the NTNU/SINTEF Hydrodynamic Laboratory in Trondheim, Norway. The tank has a test rig with cylinders suspended horizontally on a set of springs mounted on it. Reduced velocities were ranging from 4 to 15, depending on the equivalent diameter of the piggyback pair. In this experimental work, the effects of different diameter ratios and the angle of attack of the flow on the cylinders arranged normal to the flow were investigated. Three different diameter ratio cases were investigated: D+0.5D, D+0.32D and D+0.25D. Attack angles 0°, 30°, 60°, 90°, 120°, 150° and 180° were tested for these 3 diameter ratios giving a total of 21 test cases. The results obtained show that, for all cases of diameters ratios, high response amplitude ratios, as high as 1.7, can occur at reduced velocities less than 10 when the angle of attack is at 90°. It was also observed that vibrations that are characteristic of galloping instabilities occurred at an attack angle of 180° for the D+0.5D and the D+0.32D configurations. For the D+0.25D case, the response amplitudes were similar to a VIV situation. Comparing the response of the different diameter ratios show that the largest pipeline to piggyback ratio gives the largest responses for all attack angles.

New Developments in the Disposal of Offshore Installations

1999 ◽  
Vol 14 (4) ◽  
pp. 523-540
Author(s):  
Louise de La Fayette
Keyword(s):  
Oil And Gas ◽  
National Level ◽  
Regulatory Regime ◽  
New Developments ◽  
The United Kingdom ◽  
Offshore Installations ◽  
Scientific Group ◽  
Offshore Oil And Gas ◽  
Public Reaction ◽  
Offshore Oil

AbstractIn 1995, Greenpeace International protested the proposed ocean dumping of the offshore installation, Brent Spar. This protest prompted a strong public reaction which in turn led to the recycling of the Brent Spar on land and also to a reconsideration of the relevant legal regime under the OSPAR Convention. In July 1998, the OSPAR Commission meeting at the ministerial level adopted a ban on the disposal of offshore oil and gas installations at sea. Since that time, there have been further developments at the global, regional and national level. This article examines these developments at the OSPAR Commission, at the European Parliament, by the Scientific Group of the London Convention 1972, and in the United Kingdom, which is now implementing the OSPAR decision in its national regulatory regime.

ENVIRONMENTAL AND SAFETY LEGISLATION FOR THE OFFSHORE OIL AND GAS SECTOR IN KAZAKHSTAN: A CRITICAL REVIEW

2005 ◽  
Vol 07 (04) ◽  
pp. 705-733
Author(s):  
JUAN PALERM ◽  
INESSA RUDENKO ◽  
JEAN-LOUIS TEURLAI ◽  
TATYANA VASSILEVSKAYA ◽  
JOSEP RENAU
Keyword(s):  
Best Practice ◽  
Oil And Gas ◽  
Regulatory System ◽  
Regulatory Framework ◽  
International Standards ◽  
Industrial Safety ◽  
The Caspian Sea ◽  
Standards And Regulations ◽  
Offshore Oil And Gas ◽  
Offshore Oil

Kazakhstan has shown an increase in its offshore oil and gas (O&G) prospection and operation activities in the Caspian Sea since 1998, so far with a limited number of operators, but which is about to increase significantly. This is of concern, considering that the environmental and industrial safety regulatory framework is still inadequate for the prevention of pollution from a large number of operators in a very sensitive aquatic ecosystem. This paper reports on the results of a study undertaken for the European Commission Tacis programme aimed at enhancing the environmental and industrial safety regulatory framework in order to align it with EU and international best practice. Based on a comprehensive analysis of applicable international standards and regulations, as well as those of Kazakhstan, ten issues are identified which require urgent attention. These issues are discussed and recommendations made on how to address them in order to improve the regulatory system.

Introducing IO in a Drilling Company

2013 ◽  
pp. 370-388 ◽  
Author(s):  
Grethe Osborg Ose ◽  
Trygve J. Steiro
Keyword(s):  
Oil And Gas ◽  
New Technology ◽  
Oil And Gas Industry ◽  
Safety Level ◽  
Gas Industry ◽  
Offshore Installations ◽  
The Status ◽  
Offshore Oil And Gas ◽  
Integrated Operations ◽  
Offshore Oil

The introduction of Integrated Operations (IO) in the offshore oil and gas industry makes distanced and distributed decision-making a growing part of normal work. Some functions have been transferred from offshore installations to onshore offices as a consequence of the technologies that have recently become available. The authors analyze whether the onshore organization is ready for increased responsibilities by increasing the resilience in its work patterns, since resilience is important for maintaining or increasing safety level compared to current operation, where personnel on board installations can observe the plant at first hand. This study has been performed as a case study of an onshore Support Center in a drilling company at the start of the process of using the Support Center. The establishment of the Support Center involved re-arranging the office arrangements to an open landscape for all offshore installation support personnel and grouping them according to disciplines. They also acquired new technology, including video conference equipment. Important findings are that developing resilience has to be followed through at all levels of the organization. Time and resources have to be made available when work practices change, providing the physical framework alone does not improve resilience. The study also offers a more detailed description of capability resilience and which aspects should be considered when developing resilience. The authors look at the status so far in the change process and also find areas that should be developed in order to increase resilience further.

Pure Bending Behavior of Pipe Reinforced by Steel Wires (PSP)

2016 ◽  
Author(s):  
Gao Tang ◽  
Weidong Ruan ◽  
Ting Huang ◽  
Yutian Lu ◽  
Yong Bai
Keyword(s):  
Oil And Gas ◽  
Virtual Work ◽  
Steel Wire ◽  
Oil And Gas Industry ◽  
Theoretical Method ◽  
Pure Bending ◽  
Gas Industry ◽  
Offshore Installations ◽  
Bending Behavior ◽  
Offshore Oil And Gas

Plastic pipe reinforced by helically cross-winding steel wire (PSP) is a composite pipe, which is being applied into the offshore oil and gas industry. However, PSPs are often subjected to bending loading during the reeling process and offshore installations, which may lead to elliptical buckling due to the Brazier effect. Thus the ovalization instability of PSP under pure bending was investigated in this paper. According to the nonlinear ring theory, the ovalization growth of cross section during bending was studied. Then, the formulation was developed based on the principle of virtual work and was efficiently solved by Newton-Raphson method. Besides, a simplified method was proposed to simulate the behavior of steel wire reinforced layer. To verify the accuracy of the theoretical method, an ABAQUS model was employed to simulate the buckling response of PSP under pure bending. The results obtained from the theoretical method were compared with ABAQUS simulation results, and they show excellent agreements. The results can be used for predicting PSP’s bending behavior in offshore engineering applications.

scholarly journals An allision risk model for passing vessels and offshore oil and gas installations on the Norwegian Continental Shelf

2020 ◽  
Vol 235 (1) ◽  
pp. 17-32
Author(s):  
Martin Hassel ◽  
Ingrid Bouwer Utne ◽  
Jan Erik Vinnem
Keyword(s):  
Continental Shelf ◽  
Oil And Gas ◽  
Risk Model ◽  
Industry Standard ◽  
Satisfactory Performance ◽  
Offshore Installations ◽  
Offshore Oil And Gas ◽  
Offshore Oil ◽  
The Impact ◽  
Norwegian Continental Shelf

This article presents a new risk model for estimating the probability of allision risk (the impact between a ship under way and a stationary installation) from passing vessels on the Norwegian Continental Shelf (NCS). Offshore petroleum operators on the NCS are required by the Norwegian Petroleum Safety Authority (PSA) to perform risk assessments to estimate the probability of impacts between ships and offshore installations, both for field related and passing (merchant) vessels. This has typically been done using the aging industry standard COLLIDE risk model, but this article presents a new risk model based on a Bayesian Belief Network (BBN) that can replace the old COLLIDE model for passing vessels. The new risk model incorporates a wider range of risk influencing factors (RIFs) and enables a holistic and detailed analysis of risk factors, barrier elements and dependencies. Even though the risk of allision with passing vessels is very small, the potential consequences can be critical. The new risk model is more transparent and provides a better understanding of the mechanisms behind allision risk calculations. The results from the new model are aligned with industry expectations, indicating an overall satisfactory performance. The article discusses several key elements, such as the use of expert judgement to estimate RIFs when no empirical data is available, model sensitivity, and a comparative assessment of the new risk model to the old COLLIDE model.

scholarly journals Providing safety and reliability in the design of the offshore ice-resistant stationary oil and gas structures

Vestnik MGSU ◽  
2015 ◽  
pp. 167-177
Author(s):  
Valentin Aleksandrovich Polit’ko ◽  
Igor’ Grigor’evich Kantarzhi
Keyword(s):  
Oil And Gas ◽  
Design Method ◽  
Economic Consequences ◽  
International Standards ◽  
Limit States ◽  
Structure Reliability ◽  
The Social ◽  
Safety And Reliability ◽  
Offshore Oil And Gas ◽  
Offshore Oil

Safety and reliability factors, assumed in Russian and international standards, as well as the main provisions of design of offshore oil and gas structures are considered in the article. The reasons for structures destruction are classified. The analysis showed that the main design provisions and methodology of calculations related to provision of safe and reliable operation of offshore oil and gas structures by different standards are not fundamentally different: the required degree of reliability of the structure is set depending on the social and economic consequences of possible hydrodynamic accidents; calculations are based on the limit states design method using partial safety factors; etc. However, the factors accounting the degree of the structure reliability, partial safety coefficients and load combinations coefficients differ in different standards and methodologies.

Decommissioning of Offshore Oil and Gas Installations in European Waters : The End of a Decade of Indecision?

1999 ◽  
Vol 14 (1) ◽  
pp. 101-123
Author(s):  
John Woodliffe
Keyword(s):  
Oil And Gas ◽  
Working Life ◽  
International Agreements ◽  
International Agreement ◽  
The European Union ◽  
Legal Regime ◽  
The Past ◽  
Offshore Installations ◽  
Offshore Oil And Gas ◽  
Offshore Oil

AbstractFor the past 10 years or more, governments of European states have sought to lay the scientific, legal and political groundwork for an agreed normative framework intended to govern decommissioning of deep-water offshore installations, many of which will shortly reach the end of their working life. The Brent Spar episode abruptly shattered any illusion of consensus on decommissioning issues. This article traces the main stages in the development of the current legal regime, including the recent overhaul and rebuilding of regional and international agreements. It examines the implications of the assertion of interest by the European Union in this area and also documents the outcome of the Brent Spar saga. The article concludes with an assessment of the OSPAR Decision of 23 July 1998, which appears to provide the long sought for international agreement.

Decommissioning liability for offshore oil and gas installations: planning for a happy ending

2013 ◽  
Vol 53 (2) ◽  
pp. 446
Author(s):  
Stephen Murray
Keyword(s):  
Oil And Gas ◽  
Happy Ending ◽  
Policy Objective ◽  
Tax Cost ◽  
Tax Relief ◽  
Offshore Installations ◽  
The Government ◽  
Offshore Oil And Gas ◽  
The Uk ◽  
The Impact

This extended abstract outlines the draconian statutory decommissioning liability regime for offshore installations in the UK Continental Shelf (UKCS), drawing comparisons with the other jurisdictions. The impact of the regime on regulatory and contractual requirements for decommissioning security that creates barriers for new entrants into the UKCS is highlighted. One such barrier is the calculation of decommissioning security by reference to the pre-tax cost of decommissioning (i.e. without considering tax relief on decommissioning expenditure at the time it is incurred). This extended abstract comments on recent novel proposals from the government to limit the amount of capital tied up in decommissioning security by adopting measures that will facilitate calculation of decommissioning security on a post-tax basis. The UKCS is a mature province and the government is seeking to balance its desire to maximise economic recovery from the UKCS with its policy objective of ensuring that taxpayers are not responsible for decommissioning costs. The proposals envisage that the government will enter decommissioning relief deeds with owners of offshore installations. This will provide certainty about the rate of relief they will achieve in relation to their own share of decommissioning expenditure; it also ensures relief is available where they incur such costs due to the default of other parties. In essence, the government is contemplating entering a form of stabilisation agreement that will provide redress in the event that future changes in law reduce the tax relief available for decommissioning expenditure. The proposals show a bold attempt to promote investment by addressing political risk in a highly developed jurisdiction.

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