Stock Markets May 28, 2026 04:01 AM

Chevron Seeks Control of Greek Offshore Block as Athens Reviews Seismic Data

Energy ministry says Chevron has applied to acquire 70% stake and would lead gas search in Block 2 while Helleniq Energy would retain 30%

By Avery Klein CVX

Chevron has formally applied to assume a 70% interest in an offshore exploration block southwest of Greece from Helleniq Energy, the Greek energy ministry said on Thursday. If regulators approve the transfer, Chevron would become the operator and head exploration activity in Block 2 in the southwest Ionian Sea. Greece is considering allowing both companies additional time to analyse completed seismic surveys before a decision on exploratory drilling is taken.

Chevron Seeks Control of Greek Offshore Block as Athens Reviews Seismic Data
CVX

Key Points

  • Chevron has filed to acquire a 70% stake in Block 2 offshore southwest Greece from Helleniq Energy, the Greek energy ministry said.
  • If approved, Chevron would become the operator and lead gas exploration in Block 2 in the southwest Ionian Sea, with Helleniq keeping a 30% share.
  • Greece is considering giving both companies additional time to review completed seismic data before any decision is made on exploratory drilling.

ATHENS - The Greek energy ministry said on Thursday that U.S. oil major Chevron has submitted a formal request to take over a 70% stake in an offshore exploration block currently held by Helleniq Energy. The move, the ministry added, would position Chevron as the operator leading the search for gas in Block 2, located in the southwest Ionian Sea, with Helleniq retaining a 30% interest.

According to the ministry statement, Chevron's application, if approved by the relevant Greek authorities, will transfer operational control to the U.S. company and make it responsible for directing exploratory activities in the block. The ministry also said Greece is considering granting Chevron and Helleniq Energy additional time to evaluate seismic data that have already been completed for the area before either party commits to any exploratory drilling.

The announcement frames the filing as a potential expansion of U.S. involvement in the Mediterranean energy landscape. The ministry did not provide a timetable for a decision on the request or for any subsequent approvals required to commence exploratory drilling, and it emphasised that seismic data review remains a prerequisite for further action.


Next steps and procedural notes

Under the ministry's outline, a formal approval process would be required to transfer the operator role to Chevron. The companies involved may receive additional time to assess the seismic surveys already completed for Block 2. No commitment to exploratory drilling has been made at this stage; any drilling decision would follow further evaluation of the seismic information.

The ministry statement did not specify a decision date or further procedural milestones. It confined itself to confirming the filing by Chevron, the proposed ownership split should approval be granted, and the fact that Greece is contemplating extra time for seismic review before drilling decisions are taken.

Risks

  • Approval risk - The transfer of operator status and the 70% stake is contingent on Greek regulatory approval, which has not yet been granted; this affects the energy and oil and gas sectors.
  • Data-driven uncertainty - Greece is weighing extra time to evaluate existing seismic surveys, so decisions on exploratory drilling are delayed pending further analysis; this impacts exploration services and upstream project timelines.
  • Timing ambiguity - The ministry did not provide a timeline for decisions or approvals, creating uncertainty for market participants and contractors involved in offshore exploration.

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