If you searched “oil and gas production allocation software PDF,” the results Google serves back are a mix of API MPMS Chapter 20.1 standards, academic NFOGM papers, and Petroleum Experts GAP user guides. Those documents exist for a reason. None of them will help a small independent operator pick a tool and move on with their day. This page summarizes what those PDFs cover, why an operator might care, and what the practical allocation decision actually looks like when you do not have time to read 80 pages of technical reference.

Allocation is a real discipline. Understanding it well is worth the afternoon. The trick is to read enough to make a decision and stop there, not to get pulled into a reservoir-engineering rabbit hole.

What the Common Allocation PDFs Actually Cover

API MPMS Chapter 20.1 (Production Measurement and Allocation Systems).

The American Petroleum Institute’s Manual of Petroleum Measurement Standards. Chapter 20.1 is the reference for production measurement and allocation system design. It is written for engineers designing allocation architectures on multi-well gathering systems and compressor stations. Deep, detailed, and useful if you are designing an allocation system from scratch. Mostly overkill for a 30-well operator allocating commingled tank battery volumes to three leases.

NFOGM conference papers (Norwegian Society for Oil and Gas Measurement).

NFOGM publishes conference papers on allocation deployments, usually on the offshore North Sea side. Technically strong. Written for measurement engineers. Independent US onshore operators will extract about 10 percent of what they need from one of those papers and wade through 90 percent of offshore content that does not apply.

Petroleum Experts GAP user guides.

GAP is a General Allocation Program from Petroleum Experts. The user guides teach the tool. Useful if you are running GAP. Not useful if you are picking a tool or trying to understand allocation at the concept level.

Academic papers.

University petroleum engineering departments publish allocation papers regularly. Most are simulator-heavy and focused on specific reservoir or measurement problems. Narrow, deep, and rarely decision-ready for a working operator.

What Allocation Actually Is, in Plain Language

Production allocation takes a commingled volume and splits it into per-well, per-lease, and per-owner numbers.

A concrete example. You have four wells on three leases producing into one tank battery. This month the battery delivered 620 barrels of oil to the purchaser. Those 620 barrels are commingled, meaning they came from all four wells mixed together before they were measured for sale.

Allocation is the math that splits those 620 barrels back into per-well, per-lease, and per-owner volumes so the accountants can:

  • Pay the correct royalty to each mineral owner.
  • Bill the correct JIB share to each working interest partner.
  • Report the correct production to the state regulator per well.
  • File the correct severance tax.

The split is usually driven by well tests (a periodic single-well measurement that establishes the ratio of production between the wells) or by allocation factors built from decline curves.

Why Allocation Matters More Than Most Operators Realize

If allocation is wrong, every downstream number is wrong. Royalty owners are paid wrong. Working interest partners are billed wrong. State reports are wrong. Severance tax is wrong. The time, correspondence, and legal exposure of unwinding a year of bad allocation is real.

That is why serious operators either use a dedicated allocation platform or run a disciplined, audit-ready spreadsheet with well tests tied to specific test dates. What they do not do is guess.

The Practical Allocation Decision for Independents

You need production allocation software when one or more is true:

  • You have commingled wells producing into shared tank batteries.
  • You have multiple working interest partners on a lease or across leases.
  • You have royalty owners whose pay depends on per-well volumes.
  • You operate across multiple tax jurisdictions where per-well reporting matters.
  • Your current spreadsheet workflow is taking more than a day per month to reconcile.

If none of those are true, a spreadsheet is fine. If one or more are true, a dedicated allocation engine saves time and reduces errors.

Common platforms for independents:

  • FieldCap. Allocation plus production capture in one vendor.
  • PakEnergy Allocate. Allocation inside the Pak stack.
  • Avocet. Heavier allocation, fits larger shops.
  • TOW Software. Allocation-focused independent vendor.

Where GreaseBook Fits in the Allocation Workflow

GreaseBook is not an allocation engine. We are production capture. Our job is to make sure the commingled volumes going into the allocation math are accurate and timestamped in the first place.

That matters because allocation cannot be more accurate than the raw data feeding it. If the pumper gauge reads are late, missed, or wrong, no allocation engine can recover the real per-well numbers. The 6% pump-to-net improvement we see on leases migrating off paper onto GreaseBook is partly about cleaner allocation, because the per-well data going into allocation is cleaner.

GreaseBook exports clean daily volumes that flow into FieldCap, PakEnergy Allocate, or whatever allocation engine your shop uses. Most integrations are nightly or monthly file pushes. Some operators run allocation directly in Excel against GreaseBook exports, which works fine for simpler operations.

How to Read Allocation PDFs Efficiently

If you do want to read one of the PDFs before buying a tool, here is a short path.

  1. Start with API MPMS Chapter 20.1. Skim the first 20 pages. You will get the measurement philosophy and the allocation terminology. You do not need to read the whole document.
  2. Skip the NFOGM offshore papers unless you are operating offshore. The content does not transfer cleanly to US onshore independents.
  3. Read one vendor user guide (GAP, FieldCap, Pak Allocate) for the platform you are actually considering. The rest is marketing material.
  4. Stop. Decide on a platform, run a 30-day evaluation, and move on. Do not get pulled into reservoir-engineering documentation that does not inform a tool decision.

Who This Page Is Not For

This page is not for university researchers, measurement engineers designing new allocation architectures from scratch, or offshore production teams. API MPMS Chapter 20.1 and the NFOGM archive are the right reading for those audiences. It is not for reservoir engineers running simulation studies.

This page is for independent operators who searched for allocation PDFs trying to figure out whether they need allocation software and what it does. If that is you, skip most of the documents and pick a platform.

Frequently Asked Questions

What is OFM software used for?

OFM (Oil Field Manager, an SLB product) is a reserves and well analysis tool, not a production allocation tool. It is used for decline curve analysis, type curves, and reservoir analytics. Allocation and OFM sit next to each other in most operator workflows but solve different jobs. See OFM software for the full breakdown.

What is allocation in oil and gas?

Production allocation is the process of splitting a commingled volume (oil, gas, or water measured collectively from multiple wells) back into per-well, per-lease, and per-owner volumes for accounting, royalty, and regulatory purposes. Most allocation math is driven by periodic well tests or decline-curve-based allocation factors.

Where do I find a free oil and gas production allocation software PDF?

API MPMS Chapter 20.1 is available through API for purchase. NFOGM conference papers are often published free online. Vendor user guides are usually gated behind a contact form. Academic papers are free through university repositories. None of those will replace the practical decision of which allocation tool to run.

About the author: Greg Archbald is the founder of GreaseBook. He built the product from inside the oil patch and has spent 15+ years on the operator side of oil and gas technology.

Ready to Solve Allocation Without a 200-Page PDF?

If you are tired of wading through measurement standards and just want to know what allocation tool to run, take the 60-second quiz. We will route you to the honest answer based on your well count, your commingling situation, and your existing accounting stack.

Take the GreaseBook quiz.

Two minutes. No sales call, no pushy follow-up.

If GreaseBook lands and the fit turns out wrong inside year one, the 200% money-back guarantee refunds you twice the contract price. That is how confident we are in the pumper-adoption bar.

P.S. This page is not for reservoir engineers needing simulation-grade allocation modeling. No hard feelings. If you are still deciding, the quiz gives you a straight answer in the time it takes to refill your coffee.

**P.S.** If you are hunting a PDF guide to allocation software, the real question is whether your allocation problem is large enough to justify a dedicated tool. For most operators under 200 wells, a spreadsheet plus a review checklist still wins. Above that, the math flips.