Bacon W.,RasGas Company
Society of Petroleum Engineers - International Petroleum Technology Conference 2014, IPTC 2014: Unlocking Energy Through Innovation, Technology and Capability | Year: 2014
RasGas Company Limited (RasGas), on behalf of Qatar Petroleum and ExxonMobil Barzan Limited, is in the execution phase of the Barzan Gas Project, constructing two of the largest natural gas processing trains in the world to provide the State of Qatar with natural gas and associated liquids to fuel its growing economy. At peak, more than 30,000 people from over 40 nations will work together to execute this project in a safe and environmentally responsible manner. Natural gas from Qatar's North Field, the world's largest non-associated gas field, will be produced at a rate of 1,900 million standard cubic feet per day (mmscfd) by Barzan Gas Project offshore facilities, comprising three unmanned wellhead platforms, two subsea pipelines, and two onshore gas processing trains, all of which will be operated by RasGas Company Limited on behalf of Barzan Gas Company Limited. In addition to producing natural gas, ethane and field condensate for the domestic market, Barzan Gas Company Limited will export liquefied petroleum gas (LPG), sulphur, and plant condensate to the international market. Against the background of Qatar's unparalleled rapid rise to prominence on the world stage, broad development of its economy, industry, commercial and social systems, and the hosting of high-profile international events, including the 2022 World Cup, ambitious and impressive expansion programmes are being undertaken, including a new airport, new seaport, metro and rail networks, doubling the number of hotel rooms, new schools, universities, hospitals, sports stadiums, conference and exhibition centres. Natural gas supplied from the completed Barzan facilities, a landmark development, will play a key role in supporting Qatar's growth with a clean and reliable source of energy from world class production facilities, and in doing so, support the four pillars of the Qatar National Vision 2030: human development, social development, economic development, and environmental development. The Barzan Gas Project takes its name from a fortified tower built in the early 20 th century located north of Qatar's capital city Doha. Copyright 2014, International Petroleum Technology Conference.
Bailey J.R.,ExxonMobil |
Remmert S.M.,RasGas Company
SPE Drilling and Completion | Year: 2010
Significant performance improvement has been achieved by successfully managing drilling vibrations through bottomhole-assembly (BHA) redesign. This effort has resulted in increased footage per day and reduced tool damage. Prior literature has described improvements in operating practices to manage vibrations (Dupriest et al. 2005; Remmert et al. 2007) as a key component of this rate-of-penetration management process. In a parallel work activity, BHA redesign efforts have provided additional performance improvements of approximately 36% in one drilling application. Dynamic modeling of the BHA has identified the key design changes leading to these improvements. The redesigned BHA has lower calculated vibration indices than the standard BHA. The BHA design evaluation process uses a frequency-domain lateral dynamic model in both predrill forecast and post-drill hindcast modes. BHA lateral vibrations are characterized such that alternative BHA configurations may be developed and compared directly with a proposed baseline assembly. In the hindcast mode, the BHA model can be operated at the recorded weight on bit (WOB) and revolutions per minute (RPM) to generate corresponding model results in time or depth, and these values can be compared with the measured performance data. In one case study, the redesign of a BHA with downhole motor and roller reamer is described, with corresponding field data for four original BHAs and four redesigned assemblies. In a second application, model and field drilling results for two rotary-steerable assemblies are compared to evaluate the predictive ability of the model in smaller hole size and with different BHA types. Finally, the utility of the model to identify preferred rotary-speed "sweet spots" is demonstrated in a motor BHA operating in larger hole. Copyright © 2010 Society of Petroleum Engineers.
Shanmugam J.,RasGas Company
Society of Petroleum Engineers - International Petroleum Technology Conference 2014, IPTC 2014 - Innovation and Collaboration: Keys to Affordable Energy | Year: 2014
A risk-based coating condition inspection programme is discussed, enumerating the approach taken to effectively qualify and quantify the level of external corrosion and the minimum level of maintenance re-work required to maintain facility integrity and reliability. Due to a very large and complex size of the facility, the inspection approach is based on "Block Inspection" philosophy utilising the SSPC-PA5, and industry best practice. The facility is broken down into inspectable and maintainable geographic blocks and inspected with 'reporting-by-exception' approach. A high quality of inspections coupled with optimising fabric maintenance costs by addressing high priority locations will ensure that the highest risk locations are mitigated at minimal cost using a long-term strategy instead of short term maintenance activities resulting in increased risk levels in multiple locations due to lack of planning and coordination. Copyright © 2014 by the Society of Petroleum Engineers.
Rao P.V.,RasGas Company
NACE - International Corrosion Conference Series | Year: 2015
The scope of this paper is to discuss the challenges encountered in integrity management of a Quench Column against internal corrosion caused by sour water in a gas plant. The scope also covers repair techniques and methodologies adopted to maintain the integrity of the equipment without plant/unit shutdown thereby achieving improved reliability of the plant. The information provided in this paper is related to a sulphur unit equipment in a gas plant dealing with sour environments and is useful in taking a preventive approach for the safe and reliable operation of Liquefied Natural Gas (LNG) facilities to minimise volumetric downtime. The case study presented has valuable application in sulphur recovery units with respect to internal corrosion of different columns. This paper highlights the failure mechanisms in sour environments versus corrective actions and various integrity management approaches used to overcome practical difficulties to ensure integrity of equipment and enable proper planning to avoid/minimise costly shutdown of the equipment/plant. © 2015 by Nace International.
Syed R.A.,RasGas Company
Society of Petroleum Engineers - SPE Middle East Health, Safety, Environment and Sustainable Development Conference and Exhibition, MEHSE 2014 | Year: 2014
Emerging water regulations and fresh water scarcity are driving the natural gas processing industries in Qatar towards implementing Zero Liquid Discharge (ZLD) systems. ZLD implies that all wastewater produced in the plant is contained within the plant fence and treated industrial and process water (TIPW) is not discharged into the environment. This paper presents an evaluation of technologies, their potential effectiveness and challenges in achieving ZLD. Pre-treatment facilities for TIPW re-use generally consist of neutralisation and filtration packages, Hydrogen Sulfide (H2S) strippers and Dissolved Air Floatation (DAF) and Membrane Biore- Actor (MBR) units. A combination of technologies such as Brine Concentrators, Ultrafiltration (UF), Reverse Osmosis (RO), evaporation-crystallisation unit, and other emerging technologies, are considered as viable solutions for ZLD. However, space limitations, capital expenditure, and concentrate management (brine disposal minimisation) are being recognised as significant obstacles for the existing plants. Deep well injections, evaporation ponds (and landfill disposal options) and discharge to the marine environment (with proper mixing) are the only feasible options for disposal of concentrated brine. With restrictive environmental permits and requirements for these disposal methods, industrial facilities find it difficult to economically justify a ZLD system. A combination of re-concentration techniques and a comprehensive utilisation of concentrated brine, with supportive governmental policies, would be one of the most effective ways to fulfill ZLD. Copyright © 2014, Society of Petroleum Engineers.