Safety Barrier Analysis and Hazard Identification of Blowout Using Managed Pressure Drilling Compared With Conventional Drilling

2013 ◽  
Author(s):  
Arne Handal
Keyword(s):  
Hazard Identification ◽  
Safety Barrier ◽  
Barrier Analysis ◽  
Managed Pressure Drilling ◽  
Conventional Drilling

scholarly journals Participatory safety barrier analysis: a case from the offshore maritime industry

2013 ◽  
Vol 17 (2) ◽  
pp. 161-175 ◽  
Author(s):  
Trond Kongsvik ◽  
Torgeir Haavik ◽  
Gudveig Gjøsund
Keyword(s):  
Maritime Industry ◽  
Safety Barrier ◽  
Barrier Analysis

Comparative Study of Managed Pressure Drilling Application in Deepwater Gas Wells - Case Study from Offshore Eastern Mediterranean of Egypt

2021 ◽  
Author(s):  
Mahmoud Ahmed El-Husseiny ◽  
Samir Mohamed Khaled ◽  
Taher El-Sebaay El-Fakharany ◽  
Yehia Mohamed Al-Nadi
Keyword(s):  
Comparative Study ◽  
Detection System ◽  
Eastern Mediterranean ◽  
Gas Wells ◽  
Gas Field ◽  
Well Control ◽  
Rate Of Penetration ◽  
Drilling Performance ◽  
Managed Pressure Drilling ◽  
Conventional Drilling

Abstract Although devised in 2003, managed pressure drilling (MPD) has gained widespread popularity in recent years to precisely control the annular pressure profile throughout the wellbore. Due to the relatively high cost and complexity of implementing MPD, some operators still face a challenge deciding whether or not to MPD the well. In the offshore Mediterranean of Egypt, severe to catastrophic mud losses are encountered while conventionally drilling deepwater wells through cavernous fractured carbonate gas reservoirs with a narrow pore pressure-fracture gradient (PP-FG) window, leading to the risk of not reaching the planned target depth (TD). Furthermore, treating such losses was associated with long non-productive time (NPT), massive volume consumption of cement, and lost-circulation materials (LCM), in addition to well control situations encountered several times due to loss of hydrostatic head during severe losses. Accordingly, the operator decided to abandon the conventional drilling method and implement MPD technology to drill these problematic formations. In this paper, the application of MPD is to be examined versus the conventional drilling in terms of well control events, NPT, rate of penetration (ROP), mud losses per drilled meter, LCM volume pumped, and drilling operations optimization. According to the comparative study, MPD application showed a drastic improvement in all drilling performance aspects over the conventional drilling where the mud losses per drilled meter reduced from 19.6 m3/m to 3.7m3/m (123.2 bbl/m to 23.4 bbl/m). In addition to that, a 35% reduction of NPT and also a 35% reduction of LCM pumped, and 67.2 % reduction by volume of cement pumped to cure the mud losses. Moreover, the average mechanical rate of penetration increased by 37.4%. MPD was also credited with eliminating the need for an additional contingent 7" liner which was conventionally used to isolate the thief zone. The MPD ability to precisely control bottom hole pressure during drilling with the integration of MPD early kick detection system enables the rapid response in case of mud loss or kick, eliminating kick-loss cycles, well control events, and drilling flat time to change mud density. This paper provides an advanced and in-depth study for deep-water drilling problems of a natural gas field in the East Mediterranean and presents a comprehensive analysis of the MPD application with a drilling performance assessment (average ROP, mud losses, LCM and cement volumes, well control events) emphasizing how MPD can offer a practical solution for future drilling of challenging deepwater gas wells.

Towards Safety Barrier Analysis of Hydrogen Powered Maritime Vessels

2021 ◽  
Author(s):  
Lorenzo Balestra ◽  
Ruochen Yang ◽  
Ingrid Schjølberg ◽  
Ingrid B. Utne ◽  
Øystein Ulleberg
Keyword(s):  
General Framework ◽  
Operator Training ◽  
Safety Requirements ◽  
Safety Barrier ◽  
Barrier Analysis ◽  
Structured Analysis ◽  
Physical Barriers ◽  
Cold Box ◽  
Specific Scenario

Abstract This paper focuses on the use of safety barrier analysis, during the design phase of a vessel powered by cryogenic hydrogen, to identify possible weaknesses in the architecture. Barrier analysis can be used to evaluate a series of scenarios that have been identified in the industry as critical. The performance evaluation of such barriers in a specific scenario can lead to either the approval of the design, if a safety threshold is met, or the inclusion of additional barriers to mitigate risk even further. By conducting a structured analysis, it is possible to identify key barriers that need to be included in the system, intended both as physical barriers (sensors, cold box) and as administrative barriers (checklist, operator training). The method chosen for this study is the Barrier and Operational Risk Analysis (BORA) method. This method, developed for the analysis of hydrocarbon releases, is described in the paper and adapted for the analysis of cryogenic hydrogen releases. A case study is presented using the BORA method, developing the qualitative barrier analysis. The qualitative section of the method can be easily adapted to vessels of different class and size adopting the same storage solution. The barrier analysis provides a general framework to analyze the system and check that the safety requirements defined by the ship operator and maritime certification societies are met.

Evaluating Mud Weight Options in Managed Pressure Drilling for Improved Risk Management and Maximised Drilling Advantage

2021 ◽  
Author(s):  
Mark Arathoon ◽  
Syahmi Yusof ◽  
Hafiz Makri
Keyword(s):  
Pore Pressure ◽  
Worked Examples ◽  
Risk Level ◽  
Point Of Interest ◽  
Optimum Selection ◽  
Managed Pressure Drilling ◽  
Safety Margins ◽  
Remedial Actions ◽  
Fracture Gradient ◽  
Conventional Drilling

Abstract Objective/Scope The objective of this paper is to highlight the fact that while in conventional drilling there can sometimes be no mud weight solution for drilling a particular narrow margin section without either exceeding the Leak Off Test value at the shoe, or falling below the Pore Pressure at section TD. In Managed Pressure Drilling (MPD) there is often a range of mud weight solutions that can be used to drill the section, but usually one optimum mud weight that should be used, based on different risk criteria that can be evaluated. The consequences of this are that when using MPD, it could be that the section risks have not been minimised and therefore more risk than necessary has been imported into the methodology. Whereas if all MPD mud weight solutions have been evaluated, together with their associated Surface Back Pressures, and the optimum selection made, then the mitigations can be specially tailored so that the remedial actions to any system failure are clearly planned in advance, reducing the overall risk level of the operation. Methods, Procedures, Process The methodology described in this paper demonstrates the process for choosing the optimal mud weight for drilling any well section using MPD, with worked examples. This process is especially applicable for drilling very narrow margin sections, for example with only 0.2 ppg window between Pore Pressure and Fracture Gradient. By enumerating the safety margins both at the previous casing shoe and at the proposed section TD, or any other point of interest, it is possible to rank the risks of kicks and losses in that section across a range of proposed mud weights and use this information to choose the optimal mud weight. Results, Observations, Conclusions The process of evaluating the options and outcomes of using different mud weights in MPD can not only lead to the best drilling solution for the section, but can also be used as a discussion tool between the drilling team and the subsurface team, to help elucidate the most likely risks to the operation and thereby mitigate those risks in the most appropriate way. Novel/Additive Information A further benefit of this approach is that the narrowest possible drilling windows can also be evaluated and as a result, options for extending TD and potentially eliminating casing strings can be considered, leading to considerable savings, which are highly prized at all times, but especially so in a low oil price environment.

Using Safety Barrier Analysis to Facilitate Quality Improvement in Health Care: Improving Venous Thromboembolism Prophylaxis as a Proof of Concept

2019 ◽  
Vol 35 (2) ◽  
pp. 147-154 ◽  
Author(s):  
Carlton Moore ◽  
G. Cameron Coleman ◽  
Jamison Chang ◽  
Max Nagle ◽  
May-Britt Sten
Keyword(s):  
Health Care ◽  
Quality Improvement ◽  
Venous Thromboembolism ◽  
Six Sigma ◽  
Lean Six Sigma ◽  
Hospitalized Patients ◽  
Thromboembolism Prophylaxis ◽  
Venous Thromboembolism Prophylaxis ◽  
Safety Barrier ◽  
Barrier Analysis

Effective quality improvement is a key factor in optimizing the care of hospitalized patients. Unfortunately, the US health care system has a poor safety record when compared to other major industries. For example, at 250 000 per year, medical errors are the third leading cause of death in the United States. Safety barrier management, a widely used methodology in high-risk industries such as commercial airline transportation and oil drilling, has not been widely used in traditional quality improvement efforts in health care, which rely more on standard lean Six Sigma quality approaches. The authors describe a quality improvement project that uses safety barrier analysis to help inform solutions to improve venous thromboembolism prophylaxis in hospitalized patients. This study found that safety barrier analysis helped inform solutions to improve venous thromboembolism prophylaxis at the study institution and can be a useful adjunct to standard lean Six Sigma methodologies for quality improvement in health care.

Managed Pressure Drilling (MPD) Solves Conventional Drilling Problems at the Xanab Offshore Field, which Presents Severe Drilling Fluid Losses

2011 ◽  
Author(s):  
Silvestre Ramirez ◽  
Rafael Aguilar Arias ◽  
Roberto Horacio Herrera ◽  
Simon Bevilacqua ◽  
Guillermo Barrera ◽  
...  
Keyword(s):  
Drilling Fluid ◽  
Managed Pressure Drilling ◽  
Offshore Field ◽  
Fluid Losses ◽  
Conventional Drilling
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