Black Sea

What Black Sea does

Black Sea Oil & Gas SA (BSOG) is a Bucharest-headquartered, privately-held Romanian independent energy company founded in 2015 when The Carlyle Group acquired Sterling Resources' Romanian offshore operations. The company is co-owned by Carlyle International Energy Partners and the European Bank for Reconstruction and Development (EBRD). Its core asset is the Midia Gas Development (MGD) Project in the XV Midia Shallow Concession, comprising five production wells across the Ana and Doina gas fields (one subsea well at Doina and four at Ana), a monitored offshore platform at the Ana field, a 126 km subsea pipeline, and an onshore gas treatment station in Corbu, Constanta County. BSOG operates the project with a 70% interest alongside Petro Ventures Resources (20%) and Gas Plus Dacia (10%). First gas was delivered on June 15, 2022 - the first new offshore gas production in the Romanian Black Sea in over 30 years - and the project is engineered for plateau production of approximately 1 billion cubic meters per year for three years, covering roughly 12% of Romania's domestic gas consumption.

BSOG monetizes its gas production through long-term offtake contracts (notably a long-term agreement with ENGIE) and a 15-year transportation contract with Transgaz for delivery to Romania's National Transmission System. Beyond MGD, BSOG has, since May 2024, built out a second business line through its wholly-owned subsidiary BSOG Energy SRL, which is developing biogas and biomethane production plants across Romania. Two flagship facilities are in development: a biomethane plant in Alba with DN AGRAR Group (~15-20 MW capacity, EUR 30M investment) and a combined biomethane and biofertilizer facility in Constanta with Unigrains Trading (57 MW biomethane plus 250,000+ tons/year of organic fertilizers, EUR 65M+ investment). These biomethane projects target first operations around 2027-2028 and position BSOG for Romania's agricultural circular economy and the EU green energy transition.

The company employs 51-100 staff across offices in Bucharest (headquarters), Constanta (operations), and Corbu (gas treatment station). Its go-to-market is enterprise field sales of wholesale gas to large utilities via long-term contracts, plus partnership-driven development of green energy assets with industrial agricultural counterparties. Certifications include ISO 9001, ISO 14001, and ISO 45001.

Name

Black Sea

Legal name

Black Sea Oil & Gas SA

Website

https://blackseaog.com

Company type

Private

Founded year

2015

Operating status

Operating

Headcount range

51–100 employees

Short description

Black Sea Oil & Gas SA is a Romanian independent energy company, co-owned by Carlyle and EBRD, that operates the Midia Gas Development Project in the Black Sea (covering ~12% of Romania's gas needs) and is building out a biomethane production platform through its BSOG Energy subsidiary.

Ownership category

akta.pro rank

Headquarters

HQ city

Bucharest

HQ country

Romania

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Infrastructure, Operations, Technology or R&D, Personnel

Revenue model

1. Natural Gas Production and Sales: BSOG produces natural gas from the MGD Project (Ana and Doina gas fields) in the Black Sea and sells it under long-term offtake agreements. Production began June 2022 with plateau production of approximately 1 billion cubic meters per year for three years. Gas is delivered to the National Transmission System (SNT) after treatment.
2. Biomethane/Green Energy Production (via BSOG Energy): BSOG Energy subsidiary develops biomethane production plants across Romania. Revenue generated from biomethane sales as a green gas alternative to natural gas. Initial projects include facilities with DN AGRAR (15+ MW) and Unigrains Trading (57 MW), targeting domestic green gas production for Romania's energy transition.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

Black Sea Oil & Gas produces and sells natural gas from the Midia Gas Development (MGD) Project in the Romanian Black Sea, covering approximately 12% of Romania's gas consumption needs. Through its wholly-owned subsidiary BSOG Energy, the company is also developing biomethane and biofertilizer production facilities across Romania using agricultural waste as feedstock.

Product overview

Black Sea Oil & Gas SA (BSOG) is a Romanian independent energy company focused on offshore gas development and green energy transition. The company's portfolio consists of two main pillars: the MGD (Midia Gas Development) Project, which is BSOG's core product comprising offshore natural gas production from Ana and Doina fields in the Black Sea (covering approximately 12% of Romania's gas needs), and BSOG Energy, a wholly-owned subsidiary focused on renewable energy development with initial emphasis on biomethane production facilities across Romania. The biomethane projects include a facility in Alba (in partnership with DN AGRAR) and a combined biomethane/biofertilizer facility in Constanta (in partnership with Unigrains Trading).

Differentiator

Problem solved

Functional benefit

Brands

• BSOG Energy: A Romanian energy company focused on developing green energy projects, with initial focus on biogas/biomethane production plants across Romania. 100% owned by Black Sea Oil & Gas.

Products and services

• MGD (Midia Gas Development) Project Offshore natural gas development project in the Romanian Black Sea (XV Midia Shallow Concession) comprising the Ana and Doina gas fields. Includes five production wells (one subsea at Doina, four at Ana), a monitored offshore platform, a 126 km subsea pipeline, and an onshore gas treatment station in Corbu. BSOG operates and holds 70% interest, with the project covering approximately 12% of Romania's gas needs.
• BSOG Energy (Biomethane Development) Wholly-owned subsidiary of Black Sea Oil & Gas dedicated to developing green energy projects across Romania, with initial focus on biomethane production facilities using agricultural waste as feedstock. Supported by shareholders Carlyle International Energy Partners and EBRD.
• Biomethane Production Facility (Alba) Biomethane production facility in Alba, Romania developed in partnership with DN AGRAR Group. Initial capacity of up to 15 MW with potential to exceed 20 MW. Investment estimated at EUR 30 million. DN AGRAR supplies agricultural waste (manure) as raw material through a 15-year contract.
• Biomethane and Biofertilizer Combined Facility (Constanta) Combined biomethane and biofertilizer production facility in Constanta County, Romania developed in partnership with Unigrains Trading. Aims to produce 57 MW of biomethane and over 250,000 tons of organic fertilizers per annum. Investment estimated at over EUR 65 million.

Quantifiable outcome

• 12% of Romania's gas needs met by MGD Project
• +3 more outcomes

Named customers2 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Seven partnerships are on record, tiered flagship, core and supporting.

• Unigrains TradingflagshipStrategic or Co-development Partner · 7 April 2025Agricultural company managing 3,300 hectares in Constanta County, major seed producer in southern Romania. Partnership with BSOG Energy for first combined biomethane and biofertilizer production facility in Romania. Facility to produce 57 MW biomethane and 250,000+ tons organic fertilizers annually. Investment exceeds EUR 65 million.
• DN AGRAR GroupflagshipStrategic or Co-development Partner · 16 October 2024Largest dairy milk producer in Europe, operating integrated farms in Romania. Cooperating with BSOG Energy for biomethane production facility in Alba with capacity up to 15 MW (expandable to 20+ MW). DN AGRAR supplies agricultural waste (manure) as raw material through 15-year contract. Total investment approximately EUR 30 million.
• Petro Ventures ResourcescoreStrategic or Co-development Partner · 12 August 2024MGD Project co-venture partner holding 20% interest. Private investment group in the offshore gas sector. Partnered with BSOG for development of Ana and Doina gas fields.
• Gas Plus DaciacoreStrategic or Co-development Partner · 12 August 2024MGD Project co-venture partner holding 10% interest. Italian gas company, fourth largest natural gas producer in Italy, active in exploration, production, distribution and retail sale.
• ENGIEcoreOthers · 15 June 2022Major international energy company purchasing natural gas from BSOG's MGD Project under long-term offtake agreement for supply to Romanian market.
• S.N.T.G.N. TransgazcoreOthers · 15 June 2022Romanian national gas transmission system operator. 15-year contract for transportation of natural gas produced from MGD Project into the National Transmission System (SNT).
• Mare Nostrum NGOsupportingStrategic or Co-development Partner · 1 January 2020Environmental NGO implementing the VADUrabil CSR project since 2020, focusing on sustainable development of Vadu area and Danube Delta region. Partnership involves environmental education, community development, and conservation initiatives.

Scale indicators10 records

Recent moves7 records

Expansion highlights5 records

Broad incumbents

• MOL Group: Hungarian-headquartered integrated energy group with E&P, refining and retail across Central and Eastern Europe, including Romania. Comparable as a regional upstream operator with overlapping Central European gas exposure and growing interest in green/renewable energy.
• Wintershall Dea: Major European upstream gas and oil company with offshore operations across the North Sea and increasingly in frontier regions. Comparable as a European-focused offshore gas operator pursuing similar hub-and-tieback development models around existing infrastructure.

Direct peers

• OMV Petrom: Romania's largest integrated oil and gas company and the dominant upstream operator in the country. Directly comparable as a domestic Romanian gas E&P player serving the same national market and Transgaz-connected infrastructure as BSOG.
• Romgaz: Romanian state-owned natural gas producer and the country's largest gas supplier. Comparable as a domestic gas producer competing in the same Romanian market and reliant on the National Transmission System, with overlapping onshore/offshore development ambitions.
• Neptune Energy: Mid-cap European upstream operator focused on offshore gas production (North Sea, Algeria). Comparable as a privately held, sponsor-backed offshore gas developer with similar hub-style infrastructure strategies and central European market exposure.
• Vermilion Energy: International gas-weighted E&P company with significant European operations (France, Germany, Netherlands, Ireland). Comparable as a publicly listed gas-focused producer operating in mature European jurisdictions with similar offshore/onshore hub-style production profiles.
• Gas Plus Dacia: Italian-headquartered natural gas producer holding a 10% interest in BSOG's MGD Project and one of BSOG's JV partners. Comparable as a mid-cap European gas producer with direct operational overlap through its stake in the same Ana and Doina fields.

Regional players

• Engie Romania: Romanian subsidiary of French utility Engie and BSOG's anchor offtake buyer under the long-term gas supply agreement. Comparable as a downstream gas buyer and emerging biomethane/RNG buyer in Romania, sharing the same Transgaz-connected Romanian gas market.
• S.N.T.G.N. Transgaz: Romanian state-owned operator of the National Transmission System and BSOG's 15-year gas transportation counterparty. Comparable as a Romanian gas infrastructure operator with direct revenue dependency on volumes flowing from BSOG and other domestic producers.

Emerging players

• Sintana Energy: TSX-V listed pure-play Romanian offshore exploration company with interests in the Black Sea and surrounding acreage. Comparable as a Romania-focused upstream developer pursuing the same Black Sea exploration thesis that BSOG's predecessor Sterling Resources pursued.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/channel/UCcygxJwi3yskrwXj3Xzj-tQ
• LinkedInlinkedin.com/company/black-sea-oil-and-gas-sa

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Black Sea