You open a division order for a new horizontal well on your tract, run the decimal yourself, and the number does not match. Or you receive two division orders for what appears to be the same well.
Neither is necessarily a mistake. In many cases the difference comes from how production is allocated across multiple units or tracts — a second calculation step the standard acreage formula does not include.
This post walks through allocation wells and multi-unit horizontals, shows a simplified 60/40 example, and points to the Texas and Oklahoma records that help you understand how production was allocated so you can verify your decimal before you sign. For the foundational decimal formula on a standard pooled unit, read How to Calculate Your Royalty Decimal Interest first.
When the standard acreage formula is not enough
For a standard pooled or spaced unit, the decimal calculation is generally straightforward: your net mineral acres in the unit, divided by total unit acres, multiplied by your royalty rate. A 10-acre interest in a 640-acre unit at a 3/16 royalty produces a decimal of 0.00292969. That basic calculation is covered in Valor’s royalty decimal calculator.
Certain multi-unit and allocation-style horizontal wells add another layer to that formula. A conventional horizontal well contained within a standard pooled or spaced unit can still use the familiar acreage-based calculation. The math becomes more complicated when a well’s productive interval extends across separately treated units or tracts and production must be allocated among them.
In a lateral-length allocation scenario, if 60% of the productive interval sits under Section A and 40% sits under Section B, 60% of the well’s production may be allocated to Section A and 40% to Section B. An owner’s unit decimal would then be adjusted by the allocation factor applicable to that unit. Overlooking that additional step is one of the most common reasons an owner cannot reproduce the decimal shown on a division order.
A worked 60/40 example
Say you own 20 net mineral acres in Section A. Section A is a 640-acre unit. Section B, immediately south, is also 640 acres. A horizontal well produces across both units, with 60% of the productive interval attributed to Section A and 40% attributed to Section B. Your lease royalty is 3/16 or 0.1875.
Here is a simplified example of how a 60% allocation factor affects the decimal:
Step 1. Calculate your unit decimal in Section A:
20 ÷ 640 × 0.1875 = 0.00585938
Step 2. Apply Section A’s 60% allocation factor:
0.00585938 × 0.60 = 0.00351563
The resulting decimal is 0.00351563, not 0.00585938. If you calculated only the first step, the difference is almost certainly an allocation factor being applied — not an operator error.
If you also own minerals in Section B, you will likely receive a separate division order for that unit. The decimal for Section B would be calculated independently using the ownership, royalty rate, unit information, and allocation factor applicable there.
The same general concept applies when a multiunit well crosses three units. In Oklahoma, approved allocation factors generally reflect the well’s completion interval across the affected units. Texas allocation and production-sharing wells require a review of both regulatory filings and the governing agreements, so the governing documents — not just the RRC filing — control the royalty calculation.
Where to look in Texas
In Texas, Railroad Commission records are the right starting point for understanding how the well was permitted and which tracts were associated with it — but they do not by themselves determine how your royalty must be calculated. Lease terms, pooling authority, production-sharing agreements, and other governing documents may also affect the answer.
Start with the W-1 drilling permit application, which provides information about the well location and permitted wellbore. Review the full W-1 permit packet, horizontal wellbore information, associated plat, and P-16 acreage designation to understand the well path and the tracts or acreage associated with the well.
For an allocation or production-sharing well, compare those filings against the governing lease, pooling, or production-sharing documents before assuming that a particular footage percentage is also your royalty allocation percentage. The P-16 acreage designation shows the tracts and acreage associated with the well but should not be treated by itself as proof of the royalty allocation required under your lease.
RRC records can generally be searched by API number, lease name, or operator. If your division order or check detail lists the API number, that is the fastest place to start. If the permit records, well path, and allocation reflected in your division order do not appear to reconcile, send the question to the operator in writing before you sign anything.
For a broader guide to reviewing public records related to mineral ownership, read Valor’s courthouse mineral research guide.
Where to look in Oklahoma
Oklahoma handles multiunit horizontals through a formal spacing, pooling, and multiunit-well framework administered by the Oklahoma Corporation Commission.
For a multiunit horizontal well, start with the OCC multiunit horizontal well order. The order identifies the affected units and establishes or approves the allocation factors used to allocate production and proceeds among them. Oklahoma law generally calculates each affected unit’s allocation factor using the portion of the completion interval located within that unit compared with the well’s entire completion interval, although the Commission may approve adjustments when necessary.
Form 1002A, the Completion Report, provides additional well-completion information. Associated plats and well records can help you understand the completed lateral. Pooling orders may also be relevant if an owner’s working interest was subject to forced pooling, but they are separate from the OCC order approving the multiunit horizontal well.
If you cannot reconcile your ownership with the applicable OCC orders and well records, investigate rather than assuming the discrepancy is harmless. A missed tract in a pooling order is one of the most common sources of missing royalty payments. For more context on Oklahoma pooling and how it differs from Texas, read Forced Pooling in Oklahoma vs. Texas.
What to do when multiple division orders show up
If you receive two or three division orders associated with what appears to be the same well, do not assume one is a duplicate. Multiple documents typically reflect ownership in different units, though a second document could also be an amended or corrected division order superseding the first.
Work through this checklist before you sign either one:
Confirm the API number. If the API is the same on multiple documents, compare the remaining property and unit information to understand why separate division orders were issued.
Compare the unit or legal descriptions. Review the section-township-range information, unit name, or other property description on each document. They should differ if the lateral crosses multiple units.
Recalculate each decimal independently. Use the acreage, royalty rate, and allocation information applicable to that specific unit. Do not assume the two decimals will have a predetermined mathematical relationship to one another.
Review the supporting records. In Texas, review the W-1 permit packet, P-16, and related agreements where applicable. In Oklahoma, review the multiunit horizontal well order and relevant completion records.
Ask questions before signing a decimal you cannot reconcile. A discrepancy does not automatically mean the operator made an error, but you should understand what is driving the difference before you sign. For more guidance on checking the math behind your division order, read How to Calculate Your Royalty Decimal Interest.
If you received a division order with an unfamiliar format and are not sure what type of document you are holding, read Division Order, Lease Offer, or Buyout? How to Read the Letter About Your Mineral Rights before you respond to anything.
Contact Valor Today
Division order math becomes more complicated when a horizontal well produces across multiple units or tracts, and the difference carries through to every royalty payment. Contact Valor today for a free, no-obligation review — our royalty management team will review your decimal against the applicable well, unit, and allocation records, pull the underlying RRC or OCC filings, and help determine whether the division orders you received are consistent with your ownership and the available well information. We handle division order verification and decimal review for mineral owners across Texas, Oklahoma, and 30 other states.
The information provided by Valor in this blog is for general informational purposes only and is not intended to provide specific recommendations or legal or tax-related advice. This blog should not be used as a substitute for competent legal advice from a licensed attorney in your state.
Key Takeaways
- The standard NMA formula produces the right decimal for a conventional pooled unit. When a horizontal well's productive interval crosses multiple units, an additional allocation step is required — overlooking it is the most common reason an owner cannot reproduce the decimal on a division order.
- In this simplified example, a 60% allocation factor reduces the Section A decimal from 0.00585938 to 0.00351563. The difference is not an operator error — it is the allocation factor applied to the second calculation step.
- Expect one division order per unit the wellbore crosses. Multiple division orders for the same well is normal on a multiunit horizontal, not a duplication. Review each independently before signing either one.
- In Texas, pull the W-1 permit packet and P-16 acreage designation from the RRC, then compare against the governing lease and production-sharing documents — the filing alone does not determine the royalty calculation.
- In Oklahoma, start with the OCC multiunit horizontal well order, which establishes the approved allocation factors. If you own minerals in a section a lateral crosses but were not named in the relevant orders, investigate before assuming you are owed nothing.