Texas Railroad Commission Form W-4 is the Application for Multiple Completion that an oil and gas operator files with the Railroad Commission of Texas to get permission to produce two or more separate reservoirs through a single wellbore at the same time. You file it when you want one well to drain a dual, triple, or quadruple completion, and the Commission must approve that arrangement before you can produce and report each zone on its own allowable.
The form is short, but it sits at the center of how Texas tracks production, sets allowables, and prevents waste. A mistake here can stall your completion report, mess up your proration schedule, or trigger a hold on the whole lease. The current version carries a revision date of 8/69 printed on the form, so confirm you have that two-sided version before you start. About 1 in 7 oil and gas filings sent to the Commission gets bounced for missing or mismatched data, and Form W-4 is an easy one to get wrong because the lease and reservoir entries must match Commission records exactly.
In this guide you will learn:
- 🛢️ What Form W-4 does and which operators must file it
- 📋 Every document and ID number to gather before you open the form
- ✍️ A line-by-line walkthrough of each item, with sample entries
- 👷 Three full filled-out examples for real multiple-completion setups
- ⚠️ The mistakes that get W-4 filings rejected and how to dodge them
What the Form Is and Who Must File It
Form W-4, Application for Multiple Completion, is an Oil and Gas Division form that asks the Railroad Commission of Texas to authorize producing more than one reservoir through one well at the same time. A “multiple completion” means a single wellbore is completed in two, three, or four separate productive zones, with each zone isolated by packers and produced through its own tubing or annulus. Without an approved W-4, the Commission will not assign a separate allowable to each zone, and you cannot legally report and sell production by zone.
The operator of record must file the form. That is the person or company shown as the Commission-designated operator on the lease, and that operator must have a current Form P-5 Organization Report on file and be in good standing. If your P-5 has lapsed or your financial assurance is missing, the Commission will not process the W-4, and your zones will sit unauthorized.
The form ties to several related filings. You attach Form W-4A, the Sketch of Multiple Completion, which is a downhole diagram of the completion. You back it up with the completion report for each zone, meaning a Form W-2 for an oil completion or a Form G-1 for a gas completion, plus the electric log on Form L-1. The whole arrangement is governed by Statewide Rule 10, which controls multiple completions and downhole commingling, and the Commission reviews the application against that rule.
The “why” matters. Texas regulates oil and gas to prevent waste and protect correlative rights, so the state needs to know exactly which reservoir each barrel and each MCF comes from. A multiple completion blends two regulated reservoirs into one piece of steel in the ground, and the W-4 is how the Commission keeps the production records straight. A common misconception is that any well producing from more than one zone needs a W-4, but a single completion that produces from one reservoir, even across a long perforated interval, does not. The W-4 is only for separately completed, separately produced zones.
Before You Start: Documents and Information You Need
Gather everything below before you open the form, because the W-4 cross-checks against records the Commission already holds. Missing one item is the fastest way to draw a deficiency letter and lose weeks.
- Current Form P-5 Organization Report. This proves you are an authorized operator. If it is expired, the Commission will reject the W-4 outright.
- Operator name exactly as on the P-5. The Commission matches the name letter for letter, so a “Inc.” versus “LLC” mismatch can flag the filing.
- RRC District number. Each well sits in one of the Commission’s districts, and the district routes your paper filing to the right office.
- Lease name and lease/ID number for each well. Items 5 and 6 must carry the current lease identification in Commission records, not an old or operator-internal name.
- Field name and field number for every reservoir. Each zone is a distinct Commission field, and the field number must match the official field list.
- Reservoir names and zone intervals. You list the top and bottom depths of each completed zone, taken from your log and completion data.
- API number for the well. This 14-digit number ties every filing to the same wellbore and prevents the zones from being recorded against the wrong well.
- A completed Form W-4A sketch. The downhole diagram showing packers, tubing, and perforations must ride along with the W-4 as one package.
- Completion reports for each zone. A Form W-2 for oil or Form G-1 for gas, ready to file, since the Commission expects the completion paperwork to track the multiple completion.
- Prior multiple-completion reference. For Item 9, you need one real example of a multiple completion the Commission already granted in the same field with the same zones, if one exists.
Why this matters: the W-4 is a matching document. The Commission lines up your entries against the P-5, the field list, and the lease records it already keeps. If your numbers do not line up, the application does not move, and your separate zone allowables do not start.
Where to Get the Form and How to Access It
You download Form W-4 free from the Railroad Commission’s Oil and Gas Forms page, where it is listed as “W-4, Application for Multiple Completion.” The page notes it is a two-sided form that you submit as one page, and it shows the 8/69 revision. Right next to it sits Form W-4A, the sketch that must accompany it, so download both at the same time.
The form is a fillable PDF. To complete it on screen you need Adobe Reader 6.0 or higher, and the Commission recommends saving the form to your computer first before you type into it, so your entries do not vanish. Open the saved file, click into each field when the cursor becomes an I-beam, and use the Tab key to move from field to field down the page.
You can also print the blank form and complete it by hand in black ink. If you do, print clearly in block capitals so the district office can read every lease and field entry, because an unreadable field number gets treated like a missing one.
The “why” here is version control. The Commission keeps older forms in circulation around the industry, and filing an outdated layout can cost you a rejection. Pull the form straight from the official forms page each time rather than reusing a copy from your files, and confirm the 8/69 revision date printed on the form before you fill it in.
Step-by-Step: How to Fill Out Form W-4 Line by Line
Work through the form in the order the items appear. Use the exact field labels printed on the form, type in block capitals, and keep every lease, field, and reservoir entry matched to Commission records. Below, each item gets its own walkthrough with a sample entry, a “what if,” the common mistake, and a misconception to drop.
1. Operator Name
This field asks for the legal name of the company or person operating the well. Enter the operator name exactly as it appears on your current Form P-5 Organization Report, in block capitals, with the same suffix and spelling. For example, PERMIAN BASIN ENERGY LLC writes the name precisely as the P-5 shows it, not as “Permian Basin Energy” or “PB Energy.”
A common edge case is a recent name change or assignment. If you changed your company name, update the P-5 first through a Form P-5 amendment, then file the W-4 under the new name so the two records agree. The common mistake is entering a trade name or shortened version, and the direct consequence is a name-mismatch flag that holds the application until you correct it. A misconception filers carry is that the operator name is just a label; in fact the Commission uses it as a key to pull your authorization and financial assurance, so it must be exact.
2. RRC District Number
This field asks which Railroad Commission district the well sits in. Enter the one- or two-character district code for the county where the well is located, such as 08 for much of the Permian or 03 for the upper Gulf Coast. You can confirm the district from the county-to-district list on the Commission’s site.
The edge case is a lease that straddles a county line; the well’s surface location county controls the district, not the lease as a whole. The common mistake is guessing the district from memory and entering the wrong code, which routes your paper filing to the wrong district office and delays review. A misconception is that the district is cosmetic; it actually decides which office handles, approves, and files your application, so the wrong number sends your paperwork to the wrong staff.
3. RRC Identifier and API Number
This field captures the well’s identifying numbers, including the API number that uniquely tags the wellbore. Enter the full 14-digit API number with no spaces, formatted as the Commission shows it, for example 42-329-12345-00-00. This number ties the W-4, the W-4A sketch, and each completion report to the same hole in the ground.
The edge case is a re-entry or recompletion of an existing well; you use the original API number, not a new one, because the wellbore is the same. The common mistake is transposing digits in the API number, which records your multiple completion against the wrong well and scrambles your production reporting. A misconception is that the API number is optional on older forms; even when the box looks informal, leaving it blank forces the district office to look the well up by hand and slows everything down.
4. Well Number
This field asks for the operator-assigned number of the specific well being multiply completed. Enter the well number exactly as it appears on the drilling permit and completion records, such as No. 3 or 4H. Keep the format consistent with how the well is already carried in Commission records.
The edge case is a well with a letter suffix for a horizontal or sidetrack leg; carry the full designation, including the suffix, so the zones attach to the right bore. The common mistake is using an internal field nickname instead of the permitted well number, which breaks the link to the well’s existing file. A misconception is that any unique label works; the Commission needs the same well number it already has on file, because that is how it connects the new authorization to the well’s history.
5. Lease Name
This field asks for the name of the lease on which the well is completed. Enter the current lease name as it appears in Commission records, in block capitals, for each well in the application. Use the official lease name, not a surface owner’s name or an internal project label.
Because a multiple completion can involve zones carried under different lease identities, you complete the lease name for each well or zone where the form calls for it. The edge case is a lease that was renamed after a sale; use the name currently on file, and amend the lease record separately if it is out of date. The common mistake is entering an outdated or unofficial lease name, which prevents the Commission from matching the application to the right lease account. A misconception is that the lease name is just descriptive; it is a record key, and a wrong name can route allowables to the wrong lease.
6. Lease or ID Number
This field asks for the numeric lease identifier or gas well ID the Commission uses to track the lease. Enter the current lease or ID number from Commission records for each well, matching the field type, so an oil lease number for an oil zone and a gas ID for a gas zone. For example, an oil zone might carry lease No. 45678 while a gas zone carries gas ID No. 123456.
The edge case is a well producing both oil and gas zones in the same multiple completion, which can carry both an oil lease number and a separate gas well ID; enter the correct identifier for each zone. The common mistake is putting an oil lease number where a gas ID belongs, which misfiles the zone and blocks the separate allowable. A misconception is that one number covers the whole well; in a multiple completion each regulated zone can carry its own identifier, and they must each be right.
7. Field Name and Field Number for Each Zone
This field asks you to name each productive field, or reservoir, the well will produce through the multiple completion. Enter the official field name exactly as shown in Commission records, along with its field number, on a separate line for each zone. For example, SPRABERRY (TREND AREA), Field No. 09430000 on one line and WOLFCAMP, Field No. 09431001 on another.
The edge case is a newly designated or discovery field where the number is freshly assigned; use the number from the field designation, and if the field is brand new you may need a Form P-7 discovery and new field designation first. The common mistake is using a casual reservoir nickname instead of the Commission field name and number, which the staff cannot match to the official field list. A misconception is that the reservoir name alone is enough; the field number is the true key, and a missing or wrong number stalls the zone’s allowable assignment.
8. Zone Intervals and Type of Production
This field asks for the depth interval of each completed zone and whether the zone produces oil, gas, or is used for injection. Enter the top and bottom measured depths of each zone, and mark the production type for each, for example Zone interval 7,200 to 7,260 ft, Oil and Zone interval 9,540 to 9,600 ft, Gas. The depths come from your log and completion data.
The edge case is a zone used for disposal or injection rather than production; mark it as injection so the Commission treats it correctly under its injection rules. The common mistake is listing overlapping or out-of-order depths, which signals the zones are not truly isolated and invites a deficiency letter. A misconception is that the interval is just informational; it shows the Commission the zones are physically separate, which is the whole basis for granting separate completions.
9. Prior Multiple Completion in the Same Field
This field asks you to identify one instance where the Commission already granted a multiple completion including these same zones in this field. Enter the operator, lease, and well number of that prior approved multiple completion, for example Operator: Lone Star Oil Co.; Lease: Smith A; Well No. 2. This shows the Commission has approved the same zone pairing before.
The edge case is a first-of-its-kind multiple completion in the field where no prior instance exists; if none exists, you note that and the application gets reviewed on its own merits, often with closer scrutiny under Statewide Rule 10. The common mistake is leaving this blank when a prior instance does exist, which makes the staff dig for precedent and slows approval. A misconception is that this item asks about your own past wells only; it asks about any operator’s approved multiple completion of the same zones in the field, so a competitor’s prior approval counts.
10. Multiple Completion Method and Form W-4A Sketch
This field asks how the zones are mechanically isolated and produced, and it triggers the required sketch. Describe the completion type, dual, triple, or quadruple, and confirm that the Form W-4A sketch is attached showing packers, tubing strings, and perforations. For example, Dual completion: long string in Wolfcamp, short string in Spraberry, isolated by one production packer.
On the W-4A you fill out only the side that matches your installation, since one side handles a dual, triple, or quadruple completion. The edge case is an unusual completion with a sliding sleeve or commingling tool; draw it accurately rather than forcing it into a standard template, because the sketch is what the engineer reviews. The common mistake is filing the W-4 without the W-4A or with a sketch that does not match the depths in Item 8, which gets the package rejected. A misconception is that the sketch is a formality; the Commission engineer relies on it to confirm the zones are truly isolated, so a sloppy diagram can sink an otherwise complete application.
11. Certification, Signature, and Date
This field is the operator’s certification that the information is true and that the completion is built as described. Sign in ink if filing on paper, print the signer’s name and title, and enter the date in MM/DD/YYYY format, for example 06/01/2026. The signer must be a person authorized to act for the operator on the P-5.
The edge case is an agent or consultant filing on the operator’s behalf; that person must have authority on file with the Commission, or the signature will not bind the operator. The common mistake is filing an unsigned form, which is treated as not filed at all and earns an automatic return. A misconception is that a typed name alone is always enough; for paper filings the Commission expects a real signature, and a missing one voids the certification.
Three Filled-Out Examples Using Real Scenarios
Below are three common multiple-completion setups, each followed through the form by a named operator. Use them as patterns, but always match your own lease and field numbers to Commission records.
Scenario A — Carlos files a dual oil-and-gas completion in the Permian. Carlos is the completion manager at Permian Basin Energy LLC, completing one well in both the Spraberry oil zone and the Wolfcamp gas zone.
| Form Item | What Carlos Enters |
|---|---|
| 1. Operator Name | PERMIAN BASIN ENERGY LLC (exactly as on P-5) |
| 2. RRC District Number | 08 |
| 3. API Number | 42-329-31045-00-00 |
| 4. Well Number | No. 4 |
| 5. Lease Name | MARTINEZ A |
| 6. Lease or ID Number | Oil lease No. 45678; gas ID No. 123456 |
| 7. Field Name / Number | SPRABERRY (TREND AREA) 09430000; WOLFCAMP 09431001 |
| 8. Zone Intervals / Type | 7,200–7,260 ft Oil; 9,540–9,600 ft Gas |
| 9. Prior Multiple Completion | Lone Star Oil Co.; Lease Smith A; Well No. 2 |
| 10. Method / W-4A | Dual, isolated by one packer; W-4A attached |
| 11. Signature / Date | Carlos Rivera, Completion Mgr; 06/01/2026 |
Scenario B — Janet files an oil-plus-injection completion. Janet operates a stripper well for Hill Country Petroleum Inc. and completes one zone for oil and a deeper zone for saltwater disposal.
| Form Item | What Janet Enters |
|---|---|
| 1. Operator Name | HILL COUNTRY PETROLEUM INC |
| 2. RRC District Number | 03 |
| 3. API Number | 42-285-20871-00-00 |
| 4. Well Number | No. 1 |
| 5. Lease Name | DAVIS UNIT |
| 6. Lease or ID Number | Oil lease No. 30221 |
| 7. Field Name / Number | TOM O’CONNOR 09010001; disposal zone noted |
| 8. Zone Intervals / Type | 5,100–5,160 ft Oil; 6,800–6,870 ft Injection |
| 9. Prior Multiple Completion | None in this field; reviewed on merits |
| 10. Method / W-4A | Dual, oil over disposal, packer-isolated; W-4A attached |
| 11. Signature / Date | Janet Cole, Operator; 06/01/2026 |
Scenario C — Marcus files a three-zone gas multiple completion. Marcus is a regulatory analyst at Big Bend Resources, completing one well in three stacked gas reservoirs.
| Form Item | What Marcus Enters |
|---|---|
| 1. Operator Name | BIG BEND RESOURCES LLC |
| 2. RRC District Number | 7C |
| 3. API Number | 42-371-19022-00-00 |
| 4. Well Number | No. 6H |
| 5. Lease Name | CANYON STATE GAS UNIT |
| 6. Lease or ID Number | Gas IDs No. 210011, No. 210012, No. 210013 |
| 7. Field Name / Number | CANYON 08220001; STRAWN 08221002; ELLENBURGER 08222003 |
| 8. Zone Intervals / Type | 8,000–8,070 Gas; 9,200–9,280 Gas; 10,400–10,480 Gas |
| 9. Prior Multiple Completion | Big Bend Resources; Lease Canyon State 4; Well No. 5H |
| 10. Method / W-4A | Triple, three strings packer-isolated; W-4A attached |
| 11. Signature / Date | Marcus Lee, Regulatory Analyst; 06/01/2026 |
How to File the Completed Form
You can file Form W-4 by mail or by hand delivery, and many completion-related filings now move through the Commission’s electronic system as well. For the traditional paper route, you file the original and any required attachments, including the Form W-4A sketch and the completion reports, with the appropriate RRC District Office for the county where the well sits. The district office reviews the application and forwards approved multiple completions for entry into the Commission’s records.
For matters routed through Austin, such as related Statewide Rule 10 exception filings, the Commission’s Engineering Unit address is Railroad Commission of Texas, ATTN: Engineering Unit, P.O. Box 12967, Austin, TX 78711-2967. Make any checks or money orders payable to the Railroad Commission of Texas. Multiple-completion filings tied to a completion report generally do not carry a separate W-4 fee, but related applications under Rule 10 can, so confirm the current fee schedule before you mail.
For electronic filing, the RRC Online System lets authorized operators submit many completion filings online, and you attach logs and sketches as PDFs with a submission tracking number. Keep your P-5 active to keep your online access. Whichever channel you use, processing commonly takes a few weeks at the district level, longer if the application draws a deficiency letter.
Always keep proof of filing. For mail, send by a method that gives you a delivery receipt and keep the certified mail record. For hand delivery, get a date-stamped copy from the district office. For online filing, save the confirmation and tracking number, because that timestamp is your evidence the application was submitted on time.
What Happens After You File
Once the district office receives a complete W-4 package, an engineer reviews the application against Statewide Rule 10 and the field rules to confirm the zones can be separately completed and produced. If everything matches and the completion is mechanically sound, the Commission authorizes the multiple completion and assigns a separate allowable to each zone. From that point you report production for each zone on its own line, and your proration schedule reflects the separate completions.
If the engineer finds a gap, you get a deficiency letter listing what is missing or mismatched, such as a lease number that does not match records or a sketch that conflicts with the zone depths. You then have a set window to correct and refile; ignoring the letter lets the application lapse, and your zones stay unauthorized. During this time you should not be selling production by zone as if the multiple completion were already approved.
The “why” is that approval is what unlocks separate reporting. Until the Commission grants the multiple completion, the well is treated as a single completion for allowable purposes, and reporting two zones separately without authorization can create production-reporting violations. A clean, matched filing is the fastest path to getting each zone its own allowable and keeping the lease in good standing.
Mistakes to Avoid When Filling Out the Form
- Filing under a name that does not match the P-5; the Commission flags the mismatch and holds the application.
- Letting the P-5 Organization Report lapse before filing; an inactive operator cannot get a W-4 approved.
- Entering the wrong RRC District number; the paper filing routes to the wrong office and stalls.
- Transposing digits in the API number; the multiple completion attaches to the wrong wellbore.
- Using an outdated or internal lease name in Item 5; the staff cannot match it to the lease account.
- Putting an oil lease number where a gas ID belongs in Item 6; the zone is misfiled and gets no allowable.
- Using a reservoir nickname instead of the official field name and number in Item 7; the field will not match the official list.
- Listing overlapping or out-of-order zone depths in Item 8; it signals the zones are not isolated and draws a deficiency letter.
- Leaving Item 9 blank when a prior multiple completion exists; the staff must hunt for precedent and approval slows.
- Filing the W-4 without the Form W-4A sketch, or with a sketch that conflicts with the zone depths; the package gets rejected.
- Submitting an unsigned form; the Commission treats it as not filed at all.
- Reusing an old form layout instead of the current 8/69 version; outdated forms get bounced.
Do’s and Don’ts
Do:
- Pull the form fresh from the official forms page each time, so you always use the current version.
- Match every operator, lease, and field entry to Commission records, because the W-4 is a matching document.
- Attach the Form W-4A sketch as one package with the W-4, since the engineer reviews them together.
- List each zone on its own line with clean, non-overlapping depths, so isolation is obvious.
- Keep your P-5 active and your financial assurance current, because the Commission checks both before approving.
- Save dated proof of filing for every channel, so you can show the submission date if a dispute arises.
Don’t:
- Don’t guess the district or field number; a wrong code misroutes or misfiles the application.
- Don’t use trade names or nicknames in any record-keyed field, because the Commission cannot match them.
- Don’t start selling production by zone before approval; that can create reporting violations.
- Don’t ignore a deficiency letter; the application lapses if you let the correction window pass.
- Don’t file an unsigned or undated form, since the certification is what makes it valid.
- Don’t reuse a scanned old copy of the form; confirm the 8/69 revision date first.
Pros and Cons of Filing on Your Own vs. With Help
Pros of filing yourself:
- You save the cost of a consultant or regulatory firm, which matters for small operators.
- You control the timeline and can file the moment the completion data is ready.
- You learn the form, which speeds up every future multiple completion you file.
- You keep direct contact with the district office, so you hear about deficiencies first.
- You avoid handoff errors that happen when data passes through a third party.
Cons of filing yourself:
- A single mismatched lease or field number can cost weeks in deficiency letters.
- The interaction with Statewide Rule 10 and field rules is technical and easy to misjudge.
- You carry the full risk if the zones are reported separately before approval.
- You may miss precedent for Item 9 that a regulatory specialist would know.
- A wrong W-4A sketch can sink the application, and engineering review is unforgiving.
FAQs
Is Form W-4 the same as the IRS W-4 tax form?
No. The Texas RRC Form W-4 is the Application for Multiple Completion for oil and gas wells. It has nothing to do with the IRS employee withholding W-4 or the Railroad Retirement Board W-4.
Do I need a current P-5 to file Form W-4?
Yes. You must have an active Form P-5 Organization Report and any required financial assurance on file. The Commission will not approve a W-4 for an operator who is not in good standing.
Must I attach Form W-4A with the W-4?
Yes. The W-4A sketch of the multiple completion rides with the W-4 as one package. Without the sketch showing isolation, the engineer cannot approve the application.
Do I write the oil lease number or the gas ID in Item 6?
Yes, you match the identifier to the zone type. Use the oil lease number for an oil zone and the gas well ID for a gas zone, since each regulated zone carries its own identifier.
What do I put in Item 9 if there is no prior multiple completion?
No prior instance is required to exist. If none does, note that, and the Commission reviews your application on its own merits, often with closer scrutiny under Statewide Rule 10.
Does the field number really matter in Item 7?
Yes. The field number is the record key the Commission uses, not the reservoir name. A wrong or missing field number stalls the zone’s allowable assignment.
Can I file Form W-4 online?
Yes, many completion-related filings move through the RRC Online System, where you attach logs and sketches as PDFs. Paper filing at the district office remains available too.
Which RRC district do I enter if my lease crosses county lines?
Yes, this trips people up. Use the district for the county of the well’s surface location, not the lease as a whole, because the surface location controls.
Do I use a new API number for a recompletion?
No. A re-entry or recompletion of an existing well keeps the original API number, because the wellbore is the same hole in the ground.
Can a consultant sign Form W-4 for me?
Yes, if that agent has authority on file with the Commission to act for the operator. Otherwise the signature will not bind the operator and the certification fails.
What governs multiple completions in Texas?
Yes, Statewide Rule 10 controls multiple completions and downhole commingling. The Commission reviews your W-4 against that rule and the applicable field rules.
What happens if I report zones separately before approval?
No, you should not. Until the Commission grants the multiple completion, the well is treated as a single completion, and separate reporting can create production-reporting violations.
Is there a filing fee for Form W-4?
No separate W-4 fee usually applies when it accompanies a completion report, but related Rule 10 applications can carry fees, so confirm the current schedule before filing.
Do the zone depths in Item 8 have to match the W-4A sketch?
Yes. The depths on the form and the diagram must agree. A conflict between them signals the zones are not isolated and gets the package rejected.
Related reading
- How to Fill Out Texas Railroad Commission Form L-1 (w/Examples) + FAQs
- How to Fill Out Texas Railroad Commission Form W-10 (w/Examples) + FAQs
- How to Fill Out Texas Railroad Commission Form W-12 (w/Examples) + FAQs
- How to Fill Out Texas Railroad Commission Form W-15 (w/Examples) + FAQs
- How to Fill Out Texas Railroad Commission Form W-2 (w/Examples) + FAQs
- How to Fill Out Texas Railroad Commission Form W-3A (w/Examples) + FAQs