Mercury Removal Project: Issues and Challenges in Managing and Executing a Technology Project
- Muhamad Rashid Sainal (PETRONAS Carigali Sdn. Bhd.) | Tg. Mohd Uzaini Tg Mat (Petronas Reserach Sdn Bhd) | Azman Bin Shafawi (Petronas Reserach Sdn Bhd) | Abdul Jabar Mohamed (PETRONAS Carigali Sdn. Bhd.)
- Document ID
- Society of Petroleum Engineers
- SPE Annual Technical Conference and Exhibition, 11-14 November, Anaheim, California, U.S.A.
- Publication Date
- Document Type
- Conference Paper
- 2007. Society of Petroleum Engineers
- 4.1.5 Processing Equipment, 5.2.1 Phase Behavior and PVT Measurements, 7.3.3 Project Management, 5.2 Reservoir Fluid Dynamics, 4.6 Natural Gas, 4.2.3 Materials and Corrosion, 4.1.2 Separation and Treating, 4.2 Pipelines, Flowlines and Risers, 5.5.2 Core Analysis, 4.1.6 Compressors, Engines and Turbines
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This paper will share the experience of PETRONAS in managing and executing its Mercury Removal Project, one of the world's first mercury removal projects for raw and untreated condensate. It focuses on the selection of the appropriate technology for the project, the additional steps taken in mitigating the project risks, and the issues and challenges encountered during project execution. The paper will also share the challenges faced during commissioning and initial operation of the plant, and ways taken to mitigate the problems. This includes addressing issues of impurities, particulates, water, and in monitoring the performance of handling high pressure samples for mercury content determination, as well as fluctuation of mercury concentration in the hydrocarbon stream.
A project to remove mercury from hydrocarbon was initiated by PETRONAS on a fast track basis. The intent of the project is to remove mercury from the hydrocarbon prior delivering it to the downstream customer. Since the technology in removal of mercury from raw condensate had not been commercially proven before, a thorough selection process was undertaken in selecting the appropriate technology. Adsorbent technology was selected against other technologies evaluated.
The project managed to be completed ahead of time, with the first unit installed in March, 2006 some 13 months from project initiation. The results during the monitoring period proved that the unit managed to remove mercury successfully exceeding the project requirement. The data obtained from the performance monitoring of the unit was required to improve the removal efficiency and to sustain the units' long term effectiveness. It was observed that a different project management approach was needed in executing a technology project. A proper selection of technology was also vital in ensuring the success of the project.
Mercury is highly toxic, particularly when present in the form of organo-mercury species. Mercury not only is hazardous to human health and the environment but could also attack equipment components that have mercury reactive material, leading to potential catastrophic failure to the plant. With the ability to remove mercury from the hydrocarbon stream effectively, danger to human and the environment can be minimised and catastrophic failure to the plants prevented.
A technology project was initiated by PETRONAS to reduce the mercury concentration in the feedstock prior delivering it to the downstream customer. PCSB technology project is defined asproject that enables PCSB to become smart applier of technology by undertaking different and innovative approach in meeting its stakeholder's requirement.
PETRONAS Carigali Sdn Bhd (PCSB), a wholly owned E &P subsidiary of PETRONAS, operates a network of gas production facilities and infrastructure at onshore and offshore Terengganu, Malaysia. The main gas producing fields are notably Duyong, Resak and Angsi, which produces both crude oil and gas. The gas from Duyong and Resak are delivered to shore via dedicated pipeline systems namely the Joint Delivery System (JDS) and Resak Delivery system (RDS), landing at the Onshore Gas Terminal (OGT) in Kertih, Terengganu. Feeding into these delivery systems are also supplies from other fields such as Sotong, Malong, Anding, the PM-9 PSC fields and PM3 PSC (1). The gas from Angsi field is delivered to shore via a separate pipeline system operated by others. The other Operators too operate a number of pipeline systems, landing gas in Kerteh. In total, these pipeline systems deliver some 2500 MMscf/d gas to meet the onshore demand in Peninsular Malaysia.
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