Petrobras (NYSE: PBR) details Sandia-1 offshore gas discovery in Colombia

Rhea-AI Filing Summary

Petróleo Brasileiro S.A. – Petrobras reported a new gas discovery at the Sandia-1 exploratory well in Block GUA-OFF-O, in deep waters offshore Colombia. The well lies about 42 kilometers from the coast in 1,251 meters of water, near the earlier Sirius and Copoazu discoveries, underscoring the area's gas potential.

Drilling began on 06/12/2026 and reached final depth on 07/29/2026 under what the company describes as high operational and safety standards. Gas-bearing zones are being evaluated through logs and laboratory analysis. Petrobras, through PIB-COL, operates the consortium with a 44.44% interest, alongside Ecopetrol with 55.56%, consistent with its strategy to replenish reserves and support energy transition goals.

Filing Explained

The August 3 filing places the Sandia-1 gas finding at the evaluation stage: Petrobras says gas-bearing zones were detected, while well-log review and later laboratory analysis remain pending, so no quantified resource or production result is established.

Key Figures

Distance from coast: 42 kilometers Water depth: 1,251 meters Distance to Sirius wells: 18 kilometers +5 more

8 metrics

Distance from coast 42 kilometers Location of the Sandia-1 exploratory well offshore Colombia

Water depth 1,251 meters Water depth at the Sandia-1 well site

Distance to Sirius wells 18 kilometers Distance from Sandia-1 to Sirius-1 (discovery) and Sirius-2 (appraisal) wells

Distance to Copoazu-1 9 kilometers Distance from Sandia-1 to the Copoazu-1 discovery well

Drilling start date 06/12/2026 Date drilling of the Sandia-1 exploratory well commenced

Final depth date 07/29/2026 Date Sandia-1 reached its final depth

Petrobras consortium interest 44.44% Operator interest held via Petrobras International Braspetro B.V – Colombia Branch

Ecopetrol consortium interest 55.56% Partner interest in Block GUA-OFF-O

Key Terms

exploratory well, deep waters, appraisal, energy transition, +1 more

5 terms

exploratory well technical

"Petrobras informs a new gas discovery in the Sandia-1 exploratory well"

deep waters technical

"Block GUA-OFF-O in deep waters offshore Colombia"

appraisal technical

"Sirius-1 (discovery) and Sirius-2 (appraisal) wells"

An appraisal is a professional estimate of the monetary value of an asset, such as real estate, a business, equipment, or intellectual property, prepared by an independent expert. Investors use appraisals like a third‑party inspection before buying or lending: they help set fair prices, determine collateral for loans, inform accounting and tax entries, and reduce the risk of overpaying or understating an asset’s worth.

energy transition financial

"global energy demand during the energy transition"

Energy transition is the global shift from relying mainly on fossil fuels, like coal and oil, to using cleaner and renewable sources of energy, such as wind, solar, and water. This change is important to investors because it influences the future of energy markets, affects the value of related industries, and can create new opportunities or challenges as the world moves toward more sustainable energy sources.

consortium financial

"acts as the operator of the consortium (44.44% interest)"

A consortium is a temporary partnership where two or more companies, investors, or institutions pool money, skills, or assets to pursue a specific project, bid, or investment. For investors, a consortium matters because it spreads financial risk, combines expertise that can improve the chances of success, and can change who controls or benefits from a deal—similar to several people pooling cash to buy a property they couldn’t afford alone.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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FAQ

What did Petrobras (PBR) disclose about the Sandia-1 well in Colombia?

Petrobras disclosed a new gas discovery at the Sandia-1 exploratory well in Block GUA-OFF-O, in deep waters offshore Colombia. The company is now evaluating the gas-bearing zones through well logs and planned laboratory analyses to better understand the discovery.

Where is Petrobras (PBR)'s Sandia-1 exploratory well located and how deep is it?

The Sandia-1 well lies about 42 kilometers offshore Colombia in 1,251 meters of water in Block GUA-OFF-O. It is approximately 18 kilometers from the Sirius-1 and Sirius-2 wells and 9 kilometers from the Copoazu-1 discovery, highlighting a clustered gas-prone area.

When did Petrobras (PBR) drill the Sandia-1 well and reach final depth?

Drilling of Sandia-1 started on 06/12/2026 and reached its final depth on 07/29/2026. Petrobras states the operation followed high operational standards, respecting the environment and people, marking the completion of the initial exploratory drilling phase in this offshore block.

Who are the partners and equity interests in Petrobras (PBR)'s Block GUA-OFF-O?

Block GUA-OFF-O is operated by Petrobras through its subsidiary PIB-COL with a 44.44% interest. Ecopetrol S.A. holds a 55.56% interest as partner. This consortium structure governs the appraisal and any future development of the Sandia-1 gas discovery offshore Colombia.

How does the Sandia-1 discovery support Petrobras (PBR)'s long-term strategy?

The Sandia-1 gas find aligns with Petrobras’ long-term strategy to replenish oil and gas reserves by exploring new frontiers with partners. The company indicates this discovery can contribute to global energy supply and regional energy security during the ongoing energy transition period.

What are the next steps after Petrobras (PBR)'s Sandia-1 gas discovery?

Petrobras is carefully evaluating the zones where gas was detected at Sandia-1 using well logs, with samples to undergo laboratory analysis. These studies will help determine the characteristics and potential of the accumulation, guiding future appraisal and possible development decisions in Block GUA-OFF-O.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

Report of Foreign Private Issuer
Pursuant to Rule 13a-16 or 15d-16 of the

Securities Exchange Act of 1934

For the month of August, 2026

Commission File Number 1-15106

PETRÓLEO BRASILEIRO S.A. – PETROBRAS

(Exact name of registrant as specified in its charter)

Brazilian Petroleum Corporation – PETROBRAS

(Translation of Registrant's name into English)

Avenida Henrique Valadares, 28 – 9th floor 
20231-030 – Rio de Janeiro, RJ
Federative Republic of Brazil

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F. 

Form 20-F ___X___ Form 40-F _______

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes _______ No___X____

 

Petrobras confirms New Gas Discovery in Colombia

—

Rio de Janeiro, August 3, 2026 – Petróleo Brasileiro S.A. - Petrobras informs a new gas discovery in the Sandia-1 exploratory well, located in Block GUA-OFF-O in deep waters offshore Colombia.

The Sandia-1 well is located approximately 42 kilometers from the coast, at a water depth of 1251 meters and 18 kilometers from the Sirius-1 (discovery) and Sirius-2 (appraisal) wells and 9 kilometers from the Copoazu-1 well (discovery), highlighting the gas potential in Colombia´s offshore, adding volumes that will contribute to the region´s energy security.

The drilling of the Sandia-1 well started on 06/12/2026 and reached its final depth on 07/29/2026 following high operational standards and respecting the environment and people. The zones where gas was detected are being carefully evaluated through well logs and will later be analyzed in the laboratory analyses.

Petrobras’ activities in Block GUA-OFF-0 are aligned with the company’s long-term strategy, aiming to replenish oil and gas reserves through exploration of new frontiers and partnerships with other companies, contributing to the supply of global energy demand during the energy transition.

Petrobras, through its subsidiary Petrobras International Braspetro B.V – Colombia Branch (PIB-COL), acts as the operator of the consortium (44.44% interest), in partnership with Ecopetrol S.A. (55.56% interest).

www.petrobras.com.br/ir

For more information:

PETRÓLEO BRASILEIRO S.A. – PETROBRAS | Investor Relations

Email: petroinvest@petrobras.com.br/acionistas@petrobras.com.br

Av. Henrique Valadares, 28 – 9th floor – 20231-030 – Rio de Janeiro, RJ.

Tel.: 55 (21) 3224-1510/9947

This document may contain forecasts within the meaning of Section 27A of the Securities Act of 1933, as amended (Securities Act), and Section 21E of the Securities Trading Act of 1934, as amended (Trading Act) that reflect the expectations of the Company's officers. The terms: "anticipates", "believes", "expects", "predicts", "intends", "plans", "projects", "aims", "should," and similar terms, aim to identify such forecasts, which evidently involve risks or uncertainties, predicted or not by the Company. Therefore, future results of the Company's operations may differ from current expectations, and the reader should not rely solely on the information included herein.

www.petrobras.com.br/ir

For more information:

PETRÓLEO BRASILEIRO S.A. – PETROBRAS | Investor Relations

Email: petroinvest@petrobras.com.br/acionistas@petrobras.com.br

Av. Henrique Valadares, 28 – 9th floor – 20231-030 – Rio de Janeiro, RJ.

Tel.: 55 (21) 3224-1510/9947

This document may contain forecasts within the meaning of Section 27A of the Securities Act of 1933, as amended (Securities Act), and Section 21E of the Securities Trading Act of 1934, as amended (Trading Act) that reflect the expectations of the Company's officers. The terms: "anticipates", "believes", "expects", "predicts", "intends", "plans", "projects", "aims", "should," and similar terms, aim to identify such forecasts, which evidently involve risks or uncertainties, predicted or not by the Company. Therefore, future results of the Company's operations may differ from current expectations, and the reader should not rely solely on the information included herein.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: August 3, 2026

PETRÓLEO BRASILEIRO S.A–PETROBRAS

By: /s/ Fernando Sabbi Melgarejo

______________________________

Fernando Sabbi Melgarejo

Chief Financial Officer and Investor Relations Officer