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Current exploration, development and production interests.Download PDF 73KB
In Mauritania, Tullow is conducting decommissioning activities in the Chinguetti, Banda and Tiof fields.
Production from the Chinguetti oil field ceased in 2017 and an abandonment programme commenced in 2019.
About Tullow’s decommissioning and abandonment operations in Mauritania
Tullow is an equity partner in the Chinguetti, Banda and Tiof fields. Tullow is the operating partner in the Banda and Tiof fields and a non-operator in the Chinguetti field. Oil production from the Chinguetti field ceased in December 2017. Following cessation of production, the decommissioning of the Chinguetti field commenced. Following the decision to not progress the Banda gas project, Tullow commenced preparation to fully abandon the Banda and Tiof fields, in which five wells and two side-tracks were drilled. Operations are scheduled to commence after the decommissioning of the Chinguetti field.
The Banda and Tiof wells abandonment project
Scope of work
The support for Tullow’s project to plug and abandon (P&A) up to seven subsea wells in the Banda and Tiof fields offshore Mauritania will be outsourced to an Integrated Wells Management Services contractor (IWMS). Their scope of work will include the execution of the P&A activities.
The Banda and Tiof fields are located approximately 53km and 84km respectively WSW of Nouakchott, Mauritania. The fields were discovered by Woodside Energy Ltd and the Banda field was subsequently appraised by Petronas Mauritania Ltd.
Banda and Tiof are in the PSC-A and PSC-B licence areas respectively and are now operated by Tullow Petroleum Mauritania Pty Ltd. (TPMPL) and Tullow Chinguetti Production Pty Ltd. (TCPPL). The Banda and Tiof fields are two oil and gas accumulations offshore Mauritania in water depths from 200m to 1,200m. Despite being extensively appraised during the 2000s, neither field is commercially viable and so it will be necessary to P&A each of the suspended exploration and appraisal (E&A) wells. None of the wells were completed for production and there is no subsea production infrastructure on the seabed.
In 2016, a strategic decision was taken by the JV Partners (Tullow Oil, KUFPEC, Petronas and Premier Oil) to relinquish the PSC-A (Banda) and PSC-B (Tiof) exploration licences. The decision has initiated this project with the aim to fulfil its obligations to P&A all wells in accordance with NORSOK D-010, a technical standard used in Mauritania for the performance of such work.
The IWMS contractor shall commence with the planning and engineering in March 2020. During the early part of 2020 a general visual inspection of the fields will take place to provide input to the planning and engineering. Progress to commence the offshore P&A operations are dependent on the Government approval of the environmental impact assessments and abandonment plan.
Decommissioning the MRT non-operated assets
Tullow ceased production from its non-operated Mauritanian assets at the end of December 2017. The decommissioning programme of the Chinguetti field commenced in 2018 with the flushing and cleaning of the producing infrastructure, the temporary well suspension of the wells and the demobilisation of the FPSO. The P&A operations of the 15 wells is taking place in 2020 and the decommissioning campaign is scheduled to be completed in 2021 with some seabed clearance and regulatory close out.