A large independent E&P operator's well incident response team responded to a surface casing vent flow at a well where three contractors were simultaneously working. The incident investigation determined that a cementing contractor's work was causally connected to the vent flow. The operator's general counsel confirmed the MSA required the cementing contractor to name the operator as additional insured on its commercial general liability policy. When the claim was filed directly against the contractor's insurer, the insurer denied the direct claim on the basis that the AI endorsement on the contractor's policy had expired with the prior policy year - the renewal policy included no AI endorsement for the operator, and the contractor's certificate of insurance had simply noted the operator as AI without confirming that the endorsement was on the renewed policy.
The AI gap cost the operator $1.4 million in remediation costs that should have been funded under the contractor's coverage - plus $280,000 in legal fees pursuing collection from the contractor directly.
Standard AI Language in O&G MSAs
Oil and gas master service agreements are more specific about additional insured requirements than most commercial contracts. The standard AI provisions in an upstream MSA typically include:
Scope of coverage lines. AI status is required not just on CGL but across multiple coverage lines - at minimum, commercial general liability, automobile liability, and umbrella/excess. For wellbore contractors, AI on control of well coverage is common. For contractors handling pollutants, AI on contractor's pollution liability is increasingly standard.
Primary and non-contributory (P&NC) requirement. Nearly all upstream MSAs require the contractor's AI coverage to be primary and non-contributory - meaning the contractor's policy responds first, before the operator's own coverage, with no contribution requirement from the operator's policy.
Waiver of subrogation. The AI requirement is typically paired with a waiver of subrogation that prevents the contractor's insurer from pursuing subrogation against the operator after paying a claim.
Named insured matching. The MSA typically specifies that the operator's exact legal entity name must appear on the AI endorsement - not a parent company, subsidiary, or trade name.
OEM Additional Insured Requirements
One of the more complex AI provisions in oil and gas MSAs is the "other entities named" or OEM AI requirement. Rather than specifying only the operator, the MSA requires the contractor to provide AI coverage for a broader list of entities, which may include:
- The operator's parent company and affiliates
- The working interest owners (co-owners of the well)
- The landowner or surface rights owner
- The royalty interest owners
- The lender or project finance parties (common in financed well programs)
- The regulatory agencies (rare, but present in some contracts)
These OEM AI requirements can require a contractor to provide AI coverage for five to ten distinct entities on a single project. From a verification standpoint, the compliance reviewer must confirm that the AI endorsement names all required OEM entities - not just the operator.
This verification is typically not visible on the ACORD 25 face. The ACORD certificate has space for a limited AI description. OEM AI requirements typically need to be confirmed through the actual endorsement documentation - specifically the scheduled endorsement that lists each required entity by name.
Multiple AI Requirements Across Complex Relationships
In joint operating agreement (JOA) situations, where the operator is managing a well program on behalf of multiple working interest owners, the AI requirements may come from multiple sources:
The operator's MSA AI requirements. These specify AI coverage for the operator and any entities the operator requires.
Working interest owners' requirements. JOA co-owners may have independent AI requirements under the JOA or operating agreement that are passed through to contractors via the operator's MSA.
Landowner/surface owner agreements. Surface use agreements and roadway agreements may require AI status for the surface rights owner.
Regulatory permits. Some state-level drilling permits and environmental permits require insurance documentation with AI status for the state regulatory body or other governmental entities.
Managing all of these simultaneously requires that the compliance reviewer has access to all governing documents - the MSA, the JOA, the surface use agreements - not just the MSA insurance exhibit.
Pollution Liability Additional Insured
The AI requirement on contractor's pollution liability is a coverage area where compliance programs frequently fail. CPL is a specialty coverage with its own endorsement structure, and the AI mechanism works differently than on standard CGL policies.
Several key differences:
Endorsement availability. Not all CPL insurers issue AI endorsements. The availability depends on the specific carrier's policy form and underwriting appetite. A contractor who reports having AI status on their CPL may have a carrier that does not actually issue the endorsement.
Scope limitations. CPL AI endorsements are sometimes narrower than CGL AI endorsements - covering only the specific pollutant types, operations, or locations named in the endorsement rather than providing blanket coverage for the operator's locations.
Claims-made implications. CPL is almost universally written on a claims-made basis. AI status on a claims-made policy means the AI has coverage rights for claims made during the policy period - which means coverage may not extend to claims reported after the policy term even for incidents that occurred during the term.
The practical verification implication: for any MSA that requires AI status on the contractor's CPL, the verification should include a direct inquiry to the contractor's CPL carrier confirming that the AI endorsement exists, applies to the required entities, and covers the relevant scope of operations. This is a higher bar than checking the ACORD certificate - but for an exposure that can produce a $5M+ pollution cleanup claim, it is the appropriate standard.
How to Verify AI Across Complex O&G Contractor Relationships
A structured AI verification process for upstream O&G contractor programs:
Step 1: Extract AI requirements from the full MSA package. Identify all required AI entities, all coverage lines that require AI, and any endorsement form requirements.
Step 2: Review the submitted ACORD certificate. The certificate should show AI designations - but remember that ACORD notations are representations, not endorsements.
Step 3: Request the actual AI endorsement documentation. For all high-risk contractors and all coverage lines with AI requirements, request the endorsement pages from the contractor's broker. The endorsement should name each required entity and specify the coverage scope.
Step 4: Verify endorsement form and scope. For CGL AI endorsements, confirm the ISO form (CG 20 10 for ongoing operations, CG 20 37 for completed operations) or equivalent. Confirm the form provides completed operations coverage if the MSA work involves wellbore activities.
Step 5: Confirm carrier AI capability for specialty lines. For CPL AI requirements, confirm directly with the carrier or through the contractor's broker that the carrier issues AI endorsements on its CPL policy form.
Step 6: Verify OEM entities are covered. If the MSA requires AI for entities beyond the operator, confirm that all required entities are specifically named in the endorsement (or covered under a blanket endorsement with appropriate scope).
| AI Requirement | Verification Method |
|---|---|
| Operator as AI on CGL | ACORD certificate + endorsement page |
| P&NC language | Endorsement language confirms P&NC |
| Operator as AI on umbrella | Umbrella follows form; AI on primary confirmed |
| OEM entities as AI | Scheduled endorsement naming all entities |
| AI on CPL | Carrier confirmation + endorsement page |
| AI on COW | Endorsement page with operator named |
Consequences of Missing AI in High-Exposure O&G Incidents
The financial consequences of missing AI in upstream oil and gas incidents are among the most severe in any industry:
A wellbore incident where the operator lacks AI status on the contractor's COW coverage means that the $2-$8 million cost of well control and redrilling comes from the operator's own resources, with recovery against the contractor dependent on contractual indemnification - which may or may not be enforceable depending on jurisdiction and contract terms.
A pollution event where the operator lacks AI on the contractor's CPL means that EPA or state environmental agency cleanup orders are directed at the operator as the permit holder, and the operator's right to recover from the contractor's CPL insurer is limited to contractual claims - not direct claim rights.
The legal fees alone in pursuing an uninsured contractor recovery - rather than simply filing a direct claim under a properly structured AI endorsement - typically run $150,000-$400,000 before a resolution is reached.
The verification investment required to prevent these outcomes is modest by comparison. For upstream operators managing dozens to hundreds of contractor relationships, automated AI verification that confirms endorsement documentation is on file for every active contractor is the standard of care that the risk profile demands.
Bramble's oil and gas compliance platform includes automated AI requirement extraction from MSAs and endorsement verification workflows designed for upstream contractor programs. Book a demo at getbramble.com/demo to see how AI verification works in the O&G context.