Libra Consortium puts Mero SPA in operation


After almost two and a half months, Libra Consortium resumes production of the sharing field, initiating the operation of a new phase


The Libra consortium put into operation the first advance production system of the field of Mero. The new system is being carried out with the newly drilled 3-RJS-751D (Mero 2) injector well that will be interconnected to the definitive project, and the 3-RJS-739A producing well, which was connected to the long term duration test and marks the second project of the FPSO Pioneiro de Libra.

Scheduled to be in operation for about a year, the SPA will simulate the same drain loop of the final system, using the lay-out of 1.5 km distance between the producing well and the injector. The focus of the new system is to measure the time the gas will take to get to the oil well.

In the LTD, project that marked the production of Mero, the distance between the two wells was of 5 km. The estimate of the technicians of the Libra consortium is that the distance of 1,5 km to RGO shows a gradual increase in the term of six to eight months.

In addition to the two original wells, the Libra consortium plans to connect a third well to the SPA within six months. The strategy aims to test the Mero1 area, through a new producer well.

Rumors about problems

The start-up of the SPA occurred 71 days after the Libra consortium halted LTD production to begin preparations for the new project, which eventually generated rumors of technical problems. Originally, the consortium foresaw that the system would start operating in November, but later transferred the schedule of the first oil to December 5, a deadline that also ended up not being fulfilled.

As the Pioneiro de Libra remained in the same position, in practice the start of production of the SPA depended only on the disconnection of the line from the injector well of the LTD and the interconnection of the line of the new injector well. The delay in the resumption of production gave rise to rumors about wear on the production riser manufactured by Technip.

At the end of November, BE Petróleo approached Petrobras and Technip to discuss the matter. The supplier did not want to comment on the rumors, claiming that any manifestation about the project should be made by the field operator. Petrobras said at the time that there was no problem and that the production of the field would be resumed on December 5, but also did not explain the reasons for the shutdown beyond the expected time.

The rumors were that the production riser of the LTD showed wear ahead of time, similar to the problems previously recorded in other pre-salt lines. It was said that Petrobras would have requested an appraisal from an international engineering company.

During this period, production of the Mero field, which during the peak phase reached a mark of 58 thousand barrels per day of oil, was interrupted. The field’s inaugural LTD went into production in November 2017 and produced for almost a year.

The system operated through two wells, the 3-RJS-742 injector, located in the Mero 3 area, and the 3-RJS-739A producer, in the Mero 2 area. During the LTD operation time, no trace of the gas arrival in the production well and an injection well was tested in the Mero 3 area and a producer in the Mero 2 zone.

Chartered from the Ocyan / Teekay consortium, the Pioneiro de Libra FPSO has the capacity to produce 50,000 b / d of oil and inject 4 million m3 / d of gas and is contracted for 12 years.

Source: BE Petroleum

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