Riser Gas Risk Mitigation with Advanced Flow Detection and Managed Pressure Drilling Technologies in Deepwater Operations

Author(s):  
Julmar Shaun S. Toralde ◽  
Chad H. Wuest
2014 ◽  
Vol 54 (1) ◽  
pp. 23
Author(s):  
Julmar Shaun Sadicon Toralde ◽  
Chad Henry Wuest ◽  
Robert DeGasperis

The threat of riser gas in deepwater drilling operations is real. Studies show that gas kicks unintentionally entrained in oil-based mud in deepwater are unlikely to break out of solution until they are above the subsea blowout preventers (BOPs). The rig diverter is conventionally used to vent riser gas with minimal control and considerable risk and environmental impact involved. Reactive riser gas systems provide a riser gas handling (RGH) joint that is composed of a retrofitted annular BOP and a flow spool with hoses installed on top of the rig marine riser. A proactive, alternative approach to riser gas handling, called riser gas risk mitigation, is proposed by using managed pressure drilling (MPD) equipment. MPD involves the use of a rotating control device (RCD) to create a closed and pressurisable drilling system where flow out of the well is diverted to an automated MPD choke manifold with a high-resolution mass flow meter that increases the sensitivity and reaction time of the system to kicks, losses and other unwanted drilling events. Experiments and field deployments have shown that the deepwater MPD system can detect a gas influx before it dissolves in oil-based mud, allowing for management of the same using conventional well control methods. Since the MPD system has already closed the well in, automatic diversion and control of gas in the riser is also possible, if required. This paper presents experience gained from deepwater MPD operations in the Asia-Pacific to illustrate this, and possible deployment options in Australia are discussed.


2012 ◽  
Vol 52 (1) ◽  
pp. 253
Author(s):  
Melvin Devadass

The Tambun Field in Indonesia was initially developed in the 1990s to exploit oil reserves from the Baturaja Formation (BRF). Since the initial drilling program, reservoir pressure in the field has steadily declined from more than 2,600 psia to less than 1,970 psia resulting in severe circulation losses and an increase in non-productive time (NPT) during drilling and completion programs. The use of hollow glass microspheres, commonly known as glass bubbles—a low density additive (LDA)—in ultra-low density drilling fluids (< 0.9 g/cc) is a novel approach in addressing this issue. A seven-well managed pressure drilling and completion exercise was undertaken by P.T. Pertamina EP Jawa region in the first half of 2010 under challenging drilling conditions in this low-pressure, high-permeability carbonate reservoir. The glass bubble mud system was selected because it would reduce or eliminate lost circulation and stuck pipe problems, reduce formation damage, eliminate the need for post drilling stimulation and give early analysis of reservoir behaviour and production rates. This paper describes the front-end engineering design, project management, risk mitigation, detailed engineering and design, operational results and lessons learnt from this project.


2017 ◽  
Vol 4 (1) ◽  
pp. 62-66
Author(s):  
Luyen Ha Nam

From long, long time ago until nowadays information still takes a serious position for all aspect of life, fromindividual to organization. In ABC company information is somewhat very sensitive, very important. But how wekeep our information safe, well we have many ways to do that: in hard drive, removable disc etc. with otherorganizations they even have data centre to save their information. The objective of information security is to keep information safe from unwanted access. We applied Risk Mitigation Action framework on our data management system and after several months we have a result far better than before we use it: information more secure, quickly detect incidents, improve internal and external collaboration etc.


2020 ◽  
Vol 8 (2) ◽  
pp. 9
Author(s):  
Mohamad Zabidi Bin Ahmad ◽  
Rosylin Mohd. Yusof ◽  
Ahmad Rizal Mazlan

Purpose: The objective of this research is to highlight issues and review the Interbank Commodity Murabahah (CM) practice as a tool of liquidity requirement from both the Shariah and industry’s operational perspectives. Accordingly, this study seeks to analyze structure and mechanism of CM as instrument to meet the liquidity need of the Islamic financial institutions and provides an opportunity for investments. In doing so, the paper seeks to review issues related to Shariah and operations in Islamic banking. Design/methodology/approach: By conducting interview with Treasurers, Shariah Scholars and funding dealers of Islamic banks in Malaysia, the study evaluates reassessment on CM practices and operational issues in relation risk and compliance. The study focuses on Islamic Treasury Division of Islamic banks in Malaysia. Findings: The findings of the study suggest that the two most significant issues in Islamic liquidity management of Islamic banks in Malaysia are i) resembling interest ii) nature of tradability iii) structure of CM iv) the timing the transaction to be completed and v) the real brokerage cost involved in adopting the CM transactions. Research limitations/implications: The research proposes a risk mitigation and enhanced Shariah compliance framework such as strait through processing (STP) and commodity broker’s standard guideline for Islamic banks to adopt CM practices. Practical implications: This study provides direction and guidance to the Islamic Commercial Banks, Commodity Brokers and regulator (BNM) involved in the banking system to reflect upon the importance to understand the issues and limitation of CM. By highlighting the importance of efficiency in terms of time and cost saving together with Shariah issues, Islamic banks can design policies to enhance efficiency in order to either decide to maintain the adoption of CMP or to consider the proposed alternative. Social implications:Understanding the Shariah compliance and operational issues will enhance the integrity of Islamic banks which is consistent with Key Economic Growth Area of making Malaysia as International Islamic Financial Hub 2.0.


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