How the Chevron Hess arbitration shows the geopolitical nature of energy disputes

In July 2025, Chevron closed its $55bn acquisition of Hess after an ICC tribunal rejected Exxon Mobil’s bid to buy Hess’s stake in Guyana’s Stabroek Block.¹

Chevron’s chief executive Mike Wirth called the deal “a merger of two great American companies”. Exxon said it “disagree[s] with the International Chamber of Commerce panel’s interpretation but respect[s] the arbitration and dispute resolution process”.²

The merits still sit with arbitration in most energy disputes. The commercial inflection point is increasingly elsewhere. It is in the court interface where parties test interim relief and sanctions compliance, with award enforceability ultimately decided under English law.³

Background

Energy disputes have always been exposed to politics. The difference now is that geopolitical tools are entering the dispute record as mandatory constraints. Sanctions and national security screening shape whether performance is lawful and whether money can move.⁴

That matters for dispute resolution because tribunals can award damages and declarations, but they cannot unblock payment channels. When compliance risk arises, the winning party can still be left with an award that remains hard to gain a monetary benefit from.⁵

The English law framework

English arbitration remains attractive in energy because the courts are generally supportive and enforcement minded. The Arbitration Act 1996 gives the court defined powers to assist an arbitral process, including interim measures in appropriate cases.⁶

1.  Reuters (2025) Chevron closes Hess acquisition after winning Exxon legal battle. 18 July.

2.  Reuters (2025) Chevron closes Hess acquisition after winning Exxon legal battle. 18 July.

3.  Arbitration Act 1996, ss 44, 66, 101-103

4.  Reuters (2026) US eases sanctions on Venezuelan oil industry. 29 January.

5.  Ministry of Defence and Support for Armed Forces of the Islamic Republic of Iran v International Military Services Ltd [2020] EWCA Civ 145

6.  Arbitration Act 1996, ss 44, 66, 101-103

Interim measures under section 44 are where many geopolitics driven disputes first touch the courts. Freezing relief and short stop injunctions can stabilise an asset while the merits run in arbitration, often alongside orders preserving evidence.⁷

The Arbitration Act 2025 adds a default rule that the law of the arbitration agreement is the law of the seat unless the parties agree otherwise. The change responds to uncertainty highlighted in Enka and it reduces the scope for satellite litigation on governing law. ^{8 9}

The Supreme Court has also emphasised that English courts can protect the arbitration bargain by restraining foreign proceedings brought in breach of an arbitration agreement. That matters in energy, where parallel proceedings are a common pressure tactic.¹⁰

Enforcement is the second pressure point. London-seated awards can be enforced as judgments with the court’s permission under section 66. Foreign New York Convention awards are enforced through sections 101 to 103, subject to limited refusal grounds including public policy. ^{11 12}

Public policy and sanctions are no longer marginal defences. They are often the core question because they determine whether the remedy can be carried out lawfully. Recent English authorities show that courts will take illegality and constraints created by sanctions seriously even where they otherwise favour enforcement. ^{13 14}

This framework will be more closely interpreted through the following case studies.

Case study 1: Control fights in upstream assets

The Stabroek dispute was a private argument about a pre-emption clause in a joint operating agreement. In practice it was also a contest over who could control one of the world’s most

7.  Arbitration Act 1996, s 44

8.  Arbitration Act 2025, s 6A

9.  Enka Insaat ve Sanayi AS v OOO Insurance Company Chubb [2020] UKSC 38

10.  AES Ust-Kamenogorsk Hydropower Plant LLP v Ust-Kamenogorsk Hydropower Plant JSC [2013] UKSC 35

11.  Arbitration Act 1996, s 66

12.  Arbitration Act 1996, ss 101-103

13.  RBRG Trading (UK) Ltd v Sinocore International Co Ltd [2018] EWCA Civ 838

14.  Ministry of Defence and Support for Armed Forces of the Islamic Republic of Iran v International Military Services Ltd [2020] EWCA Civ 145

valuable new oil provinces. Reuters described Stabroek as holding more than 11 billion barrels of oil.[ Reuters (2025) Chevron closes Hess acquisition after winning Exxon legal battle. 18 July.]¹⁵

Contractual consent rights in upstream joint ventures are now increasingly coupled with regulatory gatekeeping. Transfers can trigger sanctions screening, beneficial ownership scrutiny, or national security review. Those constraints do not decide the contract claim, but they can decide the feasibility of specific performance and the commercial leverage of interim orders.¹⁶

The practical drafting point is that transfer mechanics and consent standards need to anticipate compliance driven delay. Parties that ignore that reality invite a second dispute about whether regulatory friction is an excuse or a risk the contract already allocated.

Case study 2: Security shocks and project finance disputes

Mozambique LNG shows how security conditions can reset the dispute landscape. Reuters reported that Mozambique and TotalEnergies agreed on 29 January 2026 to relaunch construction of the $20bn project after it was halted in 2021 following militant attacks in Cabo Delgado.¹⁷

At the relaunch, TotalEnergies’ chief executive Patrick Pouyanne said “a first offshore vessel has already been mobilized to begin installing the offshore infrastructure” and added that the target was to deliver LNG by 2029 “on a budget of $20 billion”.¹⁸

TotalEnergies has also said that the prolonged force majeure period led to renegotiation of amended financing documentation and additional equity from partners. White & Case has described advising financiers on the original multi-sourced project financing. ^{19 20}

The dispute resolution point is not just whether force majeure was valid. It is how quickly a dispute can trigger bond and guarantee calls and offtaker termination threats, with lender consents often following. Those mechanisms can collapse cashflows long before a tribunal

15.  Reuters (2025) Chevron closes Hess acquisition after winning Exxon legal battle. 18 July.

16.  Reuters (2026) US eases sanctions on Venezuelan oil industry. 29 January.

17.  Reuters (2026) Mozambique says TotalEnergies led LNG project relaunch Thursday. 29 January.

18.  Reuters (2026) Mozambique says TotalEnergies led LNG project relaunch Thursday. 29 January.

19.  TotalEnergies (2025) Mozambique LNG. Clarification by TotalEnergies on financing of the project. 2 December.

20.  White & Case (2020) White & Case advises on US$20 billion Mozambique LNG multi-sourced project financing. 15 July.

issues a final award, which makes interim court relief and enforcement planning commercially decisive.²¹

Case study 3: Sanctions and trade structures can decide whether awards pay

Sanctions and trade policy can shift faster than any arbitration timetable. In late January 2026 Reuters reported that the Trump administration issued a general license that makes it easier for US companies to buy, sell, transport, store and refine Venezuelan crude, while keeping restrictions on production and certain payment terms.[ Reuters (2026) US eases sanctions on Venezuelan oil industry. 29 January.]²²

A White House official said the measure “would help flow existing product”. An analyst quoted by Reuters summarised the position as “America First, Others Ask” sanctions relief.²³

Those shifts feed directly into contract disputes because sanctions rules can turn a payment obligation into an illegality argument. Tribunals can allocate regulatory change risk between commercial parties, but the enforceability of a remedy still depends on whether payment can be made without breaching sanctions or public policy.²⁴

Prepayment and offtake structures add another layer because they blend trade documentation with quasi finance terms. Reuters reported that GeoPark agreed to sell a minimum of 20,000 barrels a day to Vitol in return for access to up to $500m in funding. GeoPark later described the arrangement as covering production that includes Llanos 34, an onshore block in Colombia’s Llanos Basin. ^{25 26}

Disputes in these structures often start as delivery or pricing fights and end as enforcement problems. Cross-default and title transfer clauses can create rapid leverage, particularly where set-off rights sit in the documentation. If sanctions or licensing constraints intervene, the real question becomes where the cash sits and whether any enforcement route is legally available.²⁷

21.  Arbitration Act 1996, s 44

22.  Reuters (2026) US eases sanctions on Venezuelan oil industry. 29 January.

23.  Reuters (2026) US eases sanctions on Venezuelan oil industry. 29 January.

24.  Ministry of Defence and Support for Armed Forces of the Islamic Republic of Iran v International Military Services Ltd [2020] EWCA Civ 145

25.  Reuters (2024) GeoPark to access $500 mln from Vitol in return for oil deliveries. 10 May.

26.  GeoPark (2026) GeoPark renews offtake agreement with Vitol in Colombia. 27 January.

27.  Arbitration Act 1996, ss 101-103

Implications for law firms and students

For disputes teams, the question is no longer whether arbitration is better than litigation in the abstract. The question is whether a dispute strategy accounts for the points where courts and regulators will shape outcomes, including interim relief and sanctions issues, with enforcement risk running through both.²⁸

That is why energy disputes work increasingly sits across arbitration and commercial litigation, supported by projects finance and sanctions advisory. White & Case’s role on Mozambique LNG and Vinson & Elkins’ recent energy disputes outlook both frame disputes as part of a wider project and capital structure, not as a standalone courtroom problem. ^{29 30}

For students aiming at these departments, the differentiator is commercial fluency. Understanding how cashflows and security packages interact with legal remedies, plus the trade mechanics underneath them, is now as important as knowing the procedural differences between arbitration and the High Court.

Conclusion

Arbitration will keep deciding the merits of most energy disputes. Geopolitics is shifting value to the edge cases where interim relief and enforcement determine whether an award can be turned into money. Parties that draft for compliance risk and litigate with enforcement in mind will control more of the downside when politics returns.

28.  Arbitration Act 1996, ss 44, 66, 101-103

29.  White & Case (2020) White & Case advises on US$20 billion Mozambique LNG multi-sourced project financing. 15 July.

30.  Vinson & Elkins (2026) 2026 Energy Disputes Outlook. Key energy arbitration and litigation trends from Vinson & Elkins. 14 January.

Bibliography

Legislation

Arbitration Act 1996.

Arbitration Act 1996, s 44.

Arbitration Act 1996, s 42.

Arbitration Act 1996, s 43.

Arbitration Act 1996, s 66.

Arbitration Act 1996, s 101.

Arbitration Act 1996, s 103.

Arbitration Act 2025.

Arbitration Act 2025, s 6A.

Cases

AES Ust-Kamenogorsk Hydropower Plant LLP v Ust-Kamenogorsk Hydropower Plant JSC [2013] UKSC 35. www.supremecourt.uk/cases/uksc-2011-0172

Enka Insaat Ve Sanayi AS v OOO Insurance Company Chubb [2020] UKSC 38. www.supremecourt.uk/cases/uksc-2020-0091

Halliburton Company v Chubb Bermuda Insurance Ltd [2020] UKSC 48. supremecourt.uk/cases/uksc-2018-0100

RBRG Trading (UK) Ltd v Sinocore International Co Ltd [2018] EWCA Civ 838.

Ministry of Defence and Support for Armed Forces of the Islamic Republic of Iran v International Military Services Ltd [2020] EWCA Civ 145.

News and market reporting

Dang S, ‘Chevron closes Hess acquisition after winning Exxon legal battle’. www.reuters.com/business/energy/chevron-closes-hess-acquisition-after-winning-exxon-legal-battle-2025-07-18/

‘Chevron wins Exxon case but loses time, oil and billions. www.reuters.com/business/energy/chevron-wins-exxon-case-loses-time-oil-billions-2025-07-18/

‘GeoPark to access $500 mln from Vitol in return for oil deliveries. www.reuters.com/markets/deals/geopark-access-500-mln-vitol-return-oil-deliveries-2024-05-10/

‘Mozambique says TotalEnergies led LNG project relaunch Thursday’. www.reuters.com/business/energy/mozambique-says-totalenergies-led-lng-project-relaunch-thursday-2026-01-29/

‘US lifts some Venezuela sanctions to ease oil sales. www.reuters.com/business/energy/us-eases-sanctions-venezuelan-oil-industry-2026-01-29/

‘US lawmaker asks Vitol, Trafigura about Venezuela oil deals. www.reuters.com/business/energy/us-lawmaker-asks-vitol-trafigura-about-venezuela-oil-deals-2026-01-29/

‘Trump calls Colombian president a drug leader, vows end payments. www.reuters.com/world/americas/trump-calls-colombian-president-a-drug-leader-vows-end-payments-2025-10-19/

‘US sanctions Colombian president Petro, citing illicit drugs. www.reuters.com/world/americas/us-sanctions-colombian-president-petro-citing-illicit-drugs-2025-10-24/

Company and law firm publications

GeoPark, ‘GeoPark Renews Offtake Agreement With Vitol in Colombia’ (Press release, 27 January 2026). www.geo-park.com/press_releases/geopark-renews-offtake-agreement-with-vitol-in-colombia-2/

GeoPark, ‘GeoPark Renews Offtake Agreement With Vitol in Colombia’. www.businesswire.com/news/home/20260127753033/en/GeoPark-Renews-Offtake-Agreement-With-Vitol-in-Colombia

TotalEnergies, ‘Mozambique LNG. Clarification by TotalEnergies on Financing of the Project’ (Press release PDF, 2 December 2025). totalenergies.com/system/files/documents/totalenergies_pr-clarification-mozambique-financing-project_2025_en.pdf

TotalEnergies, ‘Mozambique LNG announces the full restart of all its activities onshore and offshore in Mozambique’ (Press release, 29 January 2026). totalenergies.com/news/press-releases/mozambique-lng-announces-full-restart-all-its-activities-onshore-and-offshore

White & Case, ‘White & Case Advises on US$20 Billion Mozambique LNG Multi-sourced Project Financing’ (Press release, 15 July 2020). www.whitecase.com/news/press-release/white-case-advises-us20-billion-mozambique-lng-multi-sourced-project-financingVinson & Elkins, ‘2026 Energy Disputes Outlook. Key Energy Arbitration and Litigation Trends from Vinson & Elkins’ (Client alert, 14 January 2026). www.velaw.com/insights/2026-energy-disputes-outlook-key-energy-arbitration-and-litigation-trends-from-vinson-elkins/