Joint Venture Financial Models
Executive Summary
Key Takeaways
- ✓ Oil and gas assets are frequently developed through joint ventures, with an operator managing day-to-day activity and non-operating partners holding working interests, each requiring its own share of production, cost and cash flow modelled explicitly.
- ✓ Working interest, a partner's share of costs and production, is distinct from net revenue interest, a partner's share of revenue after royalty obligations, and a joint venture model must distinguish the two rather than applying a single blended interest percentage.
- ✓ Cash calls, the operator's periodic request for each partner's funding share of joint operating costs, are the mechanism by which a non-operated joint venture is actually funded, and should be modelled against the specific joint operating agreement's cash call terms.
- ✓ An authorization for expenditure (AFE) is the specific approval mechanism for capital commitments under a joint operating agreement, and material capital items in a joint venture model should be traceable to their corresponding AFE.
Objective¶
This guide sets out how joint venture financial models represent working interest, cash calls and capital approval mechanics, within Oil & Gas Financial Modelling.
Working Interest vs. Net Revenue Interest¶
Working interest is a partner's proportionate share of both costs and production under a joint operating agreement, while net revenue interest is a partner's share of revenue after royalty obligations are deducted. These two percentages typically differ, and a joint venture model should apply each to its correct line, costs and gross production against working interest, net revenue against net revenue interest, rather than applying a single blended interest figure throughout.
Cash Calls as the Funding Mechanism¶
A cash call is the operator's periodic request to each non-operating partner for its working-interest share of funding for joint operating and capital costs. The model should reflect the specific timing and terms of cash calls set out in the applicable joint operating agreement, since this is the actual mechanism by which a non-operated joint venture is funded, distinct from how a wholly-owned asset's capital programme is financed directly.
Authorization for Expenditure (AFE)¶
Material capital commitments under a joint operating agreement typically require an authorization for expenditure (AFE), a specific approval document partners review before the operator commits joint venture funds. A joint venture model's capital expenditure line items should be traceable to their corresponding AFE, supporting verification that modelled capital commitments match what has actually been authorized under the agreement, relevant to the development planning addressed in Field Development Financial Models.
Non-Operated Reconciliation¶
A non-operating partner's model depends on the operator's reported cost, production and cash call figures, making reconciliation between the operator's reporting and the partner's own model a distinct verification step, not required in a wholly-owned asset model where a single party controls all the underlying data.
Common Structuring Pitfalls¶
- Applying a single blended interest percentage to both cost and revenue rather than distinguishing working interest from net revenue interest.
- Modelling capital funding as though the joint venture partner funds costs directly, rather than through the operator's cash call process.
- Failing to reconcile a non-operating partner's model against the operator's reported figures for cost, production and cash calls.
Continue Reading¶
Related Pillars¶
Related Technical Guides¶
How OXXON tests thisRun a free structural check with FMAE
Frequently Asked Questions
What is working interest, and how does it differ from net revenue interest?
Working interest is a partner's proportionate share of both costs and production under a joint operating agreement, while net revenue interest is a partner's share of revenue after royalty obligations are deducted. The two percentages typically differ, and a joint venture model must distinguish them rather than applying one blended interest figure to both cost and revenue.
What is a cash call?
The operator's periodic request to each non-operating partner for its working-interest share of funding for joint operating and capital costs, the mechanism by which a non-operated joint venture is actually funded, and should be modelled against the specific timing and terms set out in the applicable joint operating agreement.
What is an authorization for expenditure (AFE)?
The specific approval document under a joint operating agreement authorizing a defined capital expenditure, typically requiring partner approval before the operator commits the joint venture's funds, and material capital items in a joint venture model should be traceable to the AFE that authorized them.
Why does non-operated joint venture modelling require particular care?
Because a non-operating partner depends on the operator's reporting for cost, production and cash call information, making reconciliation between the operator's reported figures and the partner's own model a distinct verification step not required in a wholly-owned asset model.
Related Articles
Oil & Gas Financial Modelling
Oil and gas financial modelling is the practice of building financial models across the four structurally distinct segments of the hydrocarbon value chain, upstream exploration and production, midstream transport and processing, downstream refining and petrochemicals, and LNG, each governed by different revenue mechanics, contract structures and risk drivers. This page is the hub for the Knowledge Centre's oil and gas financial modelling content: industry structure and segment definitions, the financial KPIs the sector is measured against, the investment lifecycle from exploration through decommissioning, and how this domain builds toward asset and project-level models, commercial and investment analysis, and governance and assurance practice as it expands.
Upstream Financial Models
Upstream financial models project revenue and debt capacity from a depleting reserve base using a production decline curve rather than a steady-state or growth volume forecast common to most other industries. This guide sets out how upstream models are structured around exploration and production economics, reserve categories, decline mechanics, fiscal terms, and the reserve-based lending structures that finance the segment, the foundational technical grounding this domain's asset-level and commercial analysis content builds on.
Field Development Financial Models
Field development financial models translate a discovered, appraised field into a specific development plan: phased capital expenditure, first oil or first gas timing, plateau production rate, and the facility sizing and tie-back-versus-standalone decisions that shape the project's capital intensity. This guide sets out how a field development model is structured around these decisions and how it feeds into the Final Investment Decision that follows.