SINGAPORE — Jadestone Energy has decided to temporarily shut in production from the Montara oil field offshore northwest Australia to complete repairs to a crude oil tank onboard the Montara Venture FPSO.
A small leak of oil from tank 2C, identified in June, was followed by an interim repair and subsequent restart of production from Montara.
However, during preparations for the repair, an additional internal defect came to light in water ballast tank 4S, and this too has been included in the overall repair work scope.
The focus has been on remaining scheduled inspection and repair activities to the FPSO crude oil tanks and production facilities.
While a permanent repair solution to tank 2C has been developed, there have been problems trying to simultaneously accommodate the increased number of inspection and repair crews alongside production operations, not helped by weather and logistical issues.
By temporarily shutting in production again and reorganizing offshore manpower on the FPSO, Jadestone will prioritize the work of the maintenance and inspection crews as the most practical and efficient way of completing the tank repairs while progressing inspection and remediation to other tanks in the FPSO.
These activities could lead to production remaining suspended through September 2022, with associated incremental costs of $2 million to $4 million.