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Collaborating Authors
Adhi, Adhi Naharindra
New Techniques Developed to Safely Unload and Test High Rate Offshore Sour Gas Well With 7-in Monobore Completions-Lessons Learned Gas Wells Offshore Sarawak Malaysia
Azraii, Azraii Fikrie (PETRONAS CARIGALI SDN BHD) | Adhi, Adhi Naharindra (PETRONAS CARIGALI SDN BHD) | Hui Chie, Thian Hui (PETRONAS CARIGALI SDN BHD) | Claire, Claire Chang (PETRONAS CARIGALI SDN BHD) | Ridzuan, Ridzuan Shaedin (PETRONAS CARIGALI SDN BHD) | Roh, Cheol Hwan (PETRONAS CARIGALI SDN BHD) | Zarir, M. Zarir (PETRONAS CARIGALI SDN BHD) | Firdaus, Firdaus Bidi (HALLIBURTON)
Abstract Sarawak, Malaysia first offshore high rate dry gas field has an over pressured reservoir. Successful pressure control during drilling required the use of barite in the water based drilling mud in PMCD mode inside carbonate. Barite is very abrasive and is insoluble in any acid or solvent. Any barite left in the reservoir due to mud losses has to be produced back to surface after completing the wells. This cleanup is crucial for the safety and longevity of permanent facilities, especially when high rate gas wells are involved; due to the high rate of impact of any solids that may be produced with the gas. It is also critical to design the cleanup job carefully to ensure proper equipment and safety measures are taken to avoid washouts and related safety hazards. To ensure solids free production from day one, a procedure was implemented and successfully executed during the development of this first offshore high rate high-pressure sour gas field. This was achieved by using the tender rig as a main support and complementing the safety with the incorporation of the selected well testing equipment management system. In addition to the proper equipment, a detailed cleanup procedure, which covered systematic production ramp up and defined solids free criteria, was implemented from well owner or asset. So far, this well cleanup setup and program has been implemented on several wells on platforms with minor erosion and no safety issues. One platform with several wells is already producing and is flowing trouble free. This paper will describe the details of the setup of the rig facilities to clean these barite fluids from the wells, and the solids control equipment used and the cleanup procedure.
- Asia > Middle East (0.93)
- Asia > Malaysia (0.72)
- Energy > Oil & Gas > Upstream (1.00)
- Materials > Chemicals > Commodity Chemicals > Petrochemicals (0.48)
- Well Drilling > Pressure Management (1.00)
- Well Drilling > Drilling Operations (1.00)
- Well Drilling > Drilling Fluids and Materials (1.00)
- (6 more...)
Pioneering Rigless Perforating, Clean-Up Operation, Well Testing with MPLT and Bottom Hole Sampling in Remote Platform
Preveen, Preveen Kumar (PETRONAS CARIGALI SDN BHD) | Adhi, Adhi Naharindra (PETRONAS CARIGALI SDN BHD) | Shazana, Shazana M (PETRONAS CARIGALI SDN BHD) | Mior, Mior Yusni (PETRONAS CARIGALI SDN BHD) | Nurbaiti, Nurbaiti Baharuddin (EXPROGroup)
Abstract Optimization of mature fields in maximizing the hydrocarbon recovery has been a major concern for exploration and production companies including Malaysian oil companies. Field A was discovered as gas field in 1980. A minimum sized 4 slot remote wellhead jacket with no processing facilities and helideck was installed for the development of the field. Oil bearing reservoirs were encountered in two blocks at Zone 5 during the gas development drilling and was not part of the original PSC. As part of commitment to Malaysian host authority after taking over the field from an Independent Oil Company, the Project Management Team (PMT) were required to submit the Project Field Development (PFD) for oil reservoir development. Thus, perforation, sampling, well testing and logging were planned at well 1 to obtain representative fluid sample for PVT analysis and flow assurance studies. Considering the current downturn in the industry, critical decisions were made to conduct this campaign without the assistance of a drilling or workover rig which led to challenging phase of planning and execution within limited time frame. Through further optimization, the campaign kick started with a stringent budget and selection of concept which eliminated the requirement of a rig in order to achieve the objective set. A conventional Well Testing package with independent power source, lifting capability, wax management and heat radiation control was selected in order to meet the objective with the full capability to conduct well clean up, Multi Rate Test, Memory Production Logging and bottom hole PVT sampling. The strategy of execution had led to a successful campaign with no HSE issues and fast tracked the project delivery by minimizing operation duration up to 1 month which resulted in 49% of cost saving (compared to the total planned project cost). The objectives of testing the reservoirs and understand the flow behavior of stacked layers of sand were achieved with sufficient bottom hole samples collected for facilities studies and field development " Figure 1: Map offshore Malaysia
- Well Completion > Completion Installation and Operations > Perforating (1.00)
- Reservoir Description and Dynamics > Formation Evaluation & Management > Drillstem/well testing (1.00)
- Reservoir Description and Dynamics > Fluid Characterization > Phase behavior and PVT measurements (1.00)
- Production and Well Operations > Well & Reservoir Surveillance and Monitoring (1.00)