Petrobras identified the presence of hydrocarbons in the first pioneer well drilled in block C-M-657, in the Campos Basin pre-salt. The indications are of natural gas, according to information sent by the company to the National Agency of Petroleum, Natural Gas and Biofuels (ANP), this week.
Well 1-BRSA-1376D-RJS, nicknamed Naru, was drilled 308 km from the city of Rio de Janeiro, at a water depth of 2,892 meters. The evidence was found in carbonate reservoirs in the pre-salt section of the Campos Basin.
“The data from the well will be analyzed to better assess the potential and direct exploratory activities in the area,” said Petrobras, in a note.
The information that a notification of gas signs was made, alone, is not sufficient to confirm the discovery of a new natural gas field, nor that there is no oil in the region of the block. Publicly, the only data released by the ANP is the type of the notified fluid (gas, oil, both or “fluid not characterized”).
Block C-M-657 is part of the wave of new contracting of blocks in an unexplored region of the Campos and Santos basins. They are located beyond the pre-salt polygon. The C-M-657, therefore, is contracted under the concession regime, which is more attractive to companies.
It was bid on in the 15th round of 2015 and Petrobras is the operator with 30% of the consortium, in partnership with ExxonMobil (40%) and Equinor (30%).
It is a region where future pre-salt fields can be found, given the large number of blocks contracted in recent years. There are, however, no fields in production, nor infrastructure for oil and gas production. In case of exploratory success, a new frontier will also be opened for investments in gas pipelines and subsea equipment.
In yellow, the exploration blocks contracted under the concession regime (outside the pre-salt polygon) and shared around the C-M-657, in the Campos and Santos basins (source: EPE)
What are notifications
Hydrocarbon notifications are not necessarily new discoveries of oil or natural gas. A well can, for example, identify the presence of hydrocarbons, but later be classified as “dry with evidence”. Another possibility is to discover a reservoir with gas, oil or both, but without production viability, due to bad geological characteristics.
Operators are obliged to inform the ANP whenever evidence of hydrocarbons is identified during drilling or in subsequent analyzes of the wells.