🛢️ Stallion 33-28 6H

Devon Energy Williston, L.L.C · McKenzie, North Dakota County, ND · File #41538 · Generated 2026-02-13 12:33

API: 3305310499
Target Formation: Middle Bakken
Permit Explained: Yes

📋 Permit Cycle Assessment

The well file contains comprehensive contemporaneous documentation that explains and justifies the permit approval. The permit cycle is anchored by a Suspension of Drilling waiver (03/19/2025, effective before spud) that establishes the phased drilling strategy using an initial smaller rig (Pronghorn #5, spud 05/08/2025) followed by a conventional larger rig within 90 days. This waiver validates the drilling sequence and timeline documented in the mud logging report (spud 05/08/2025, TD reached 09/01/2025, total 7 days). Supporting waivers for filter sock containers (03/21/2025) and open hole logs (03/18/2025) remove routine obligations and establish data sufficiency via offset wells. The mud logging report itself—submitted post-drilling as a technical deliverable—documents actual execution within the APD stipulations: the lateral lands in the Middle Bakken with formation tops prognosed from the approved offset well reference and conforms to setback requirements via the cemented production liner design. The tubing/packer waiver (03/18/2025), scheduled for implementation at completion (11/10/2025), creates a post-drilling completion pathway consistent with the wellbore architecture achieved. All material regulatory conditions and waivers were approved before spud and are reflected in the drilling and completion execution documented in the technical reports.

🔍 Permit Cycle Signals (5)

Suspension of Drilling (SOD) Waiver for 90 days approved under NDAC 43-02-03-55 to allow phased drilling using smaller initial rig for surface casing, followed by larger conventional rig within 90-day window

Direct

📄 WELL SUNDRY FORM (Form ID: 236991, Effective Date: 03/19/2025)
📅 03/19/2025 (Exact confidence)

This permit-cycle waiver directly conditions the well spud date (05/08/2025) and drilling operations execution. The 90-day clock from initial surface casing rig spud is a time-critical operational constraint that validates the subsequent full drilling sequence (8-May-2025 through 1-September-2025).

Filter Sock Container Waiver approved under NDAC 43-02-03-19.2 — operator does not use filter media during drilling operations and is exempted from filter container requirement for drilling phase only

Direct

📄 WELL SUNDRY FORM (Form ID: 236986, Effective Date: 03/21/2025)
📅 03/21/2025 (Exact confidence)

This is a front-loaded compliance waiver issued before spud (03/21/2025, pre-spud 05/08/2025) that removes a standard drilling-phase obligation. Permits operator to avoid filter sock container maintenance during vertical and curve sections—consistent with the mud logging report showing saltwater brine used in lateral only.

Open Hole Log Waiver approved under DMR Rule 43-02-03-31 — formation tops and well logging established via offset well Stallion 33-28 3H (NDIC File #35843) within 1 mile, with GR-CBL substituted from TD to ground level

Supporting

📄 WELL SUNDRY FORM (Form ID: 236979, Effective Date: 03/18/2025, Waived via NDIC #21431)
📅 03/18/2025 (Exact confidence)

This permit-cycle waiver establishes the data sufficiency basis for drilling without full openhole logs. The Mud Logging Report (dated post-drilling operations) uses formation tops prognosed from offset well data, validating the wellbore landing within Middle Bakken target zone. This waiver pre-approves the technical approach documented in the mud logging report.

Tubing/Packer Waiver (Form ID: 237003) approved 03/18/2025 with start date 11/10/2025 — variance to NDAC 43-02-03-21 allowing casing exposure during flowback operations with 0.85 API burst safety factor and 300# gauge installation; submitted by Grayson Mill Operating

Direct

📄 WELL SUNDRY FORM (Form ID: 237003, Status: Approved, Effective Date: 03/18/2025)
📅 03/18/2025 (Exact confidence)

This waiver conditions post-drilling completion and flowback (scheduled 11/10/2025, well spudded 05/08/2025). It is temporally separated from drilling operations but directly enables the well's transition to production without conventional tubing/packer. The wellbore design documented in the mud logging report (7" and 6" casing) is consistent with this approved variance framework.

APD Stipulations (Application for Permit for New Well—Horizontal) reference Commission Order No. 33659 establishing 150' north/south setback and 500' east/west setback within 1280-acre spacing unit (Sections 28 and 33). Production liner cemented in lateral with wet shoe and frac-out capability defined as basis for north setback.

Supporting

📄 APPLICATION FOR PERMIT FOR NEW WELL - HORIZONTAL (Permit page 1, STIPULATIONS section)
📅 Unknown (Missing confidence)

This field order stipulation conditions the wellbore geometry and lateral landing target. The Mud Logging Report documents a lateral that remains 100% in Middle Bakken and achieves 26' of vertical depth into the formation at end-of-curve (11,262' MD, 10,918' TVD), consistent with the setback-constrained landing target of 10,912' TVD.

📖 Historical Context (4)

Ragged Butte-Bakken Pool definition established in APD stipulations: 50 feet above top of Bakken Formation to 100 feet below top of Three Forks Formation
📄 APPLICATION FOR PERMIT FOR NEW WELL - HORIZONTAL (Permit page 1, Pool definition) · 📅 Unknown
This pool definition persists as the operative stratigraphic and regulatory boundary for all subsequent production operations, revenue allocation, and regulatory compliance on this well and spacing unit. It constrains any future workover or recompletions.

Closed mud system with no cuttings pit required per APD Conditions of Approval; Devon must consider NDAC 43-02-03-28 (Safety Regulation) for simultaneous operations and equipment placement (150' minimum from producing wells, or 125' with spark/flame arrestor)
📄 APPLICATION FOR PERMIT FOR NEW WELL - HORIZONTAL (Permit page 1, Conditions of Approval) · 📅 Unknown
Closed mud system requirement remains in effect for the life of the well. The well pad layout (sheets C-2, C-4) and any future equipment installations must conform to equipment spacing rules. This constrains pad development and future facility modifications.

Cores and Samples requirement letter (01/27/2025, signed by Geologist Ross Edison) mandates submission of drill cuttings at 30' intervals through vertical and build sections, 200' intervals through horizontal section, with samples to state core library within 30 days of drilling completion
📄 North Dakota Department of Mineral Resources letter 'Cores and Samples' (Date: 1/27/2025) · 📅 01/27/2025
This is a post-drilling compliance obligation. Samples were collected during drilling (30 August to 1 September 2025 per mud logging report) and must be shipped within 30 days of completion of drilling operations (by ~01 October 2025). Failure to submit triggers civil penalties up to $12,500 per ND Century Code §38-08-16. The obligation persists until fulfilled.

NDIC notification requirement (from Victoria Siemieniewski Affidavit, dated 01/17/2025) for cross-unit wellbore entry: operators of adjacent spacing units (Murex Petroleum, Whiting Oil & Gas / Chord Energy) must receive directional drilling and completion plan, approx. spud date, and contact information for wells whose trajectories traverse outside the target spacing unit
📄 Affidavit of Victoria Siemieniewski, Regulatory Supervisor, Devon Energy Williston (acknowledged 01/17/2025) · 📅 01/17/2025
This is a pre-spud notification requirement that persists as a record of compliance. The well design (BHL at 150' FNL & 860' FEL in Section 28, T151N, R101W; surface location in Section 33) crosses from the Section 33 spacing unit into Section 28, triggering NDIC Orders 31973 and 31848. Operators of offset units retain standing to request deviation surveys or other operational adjustments if they demonstrate undue harm from reservoir communication or wellbore proximity. The notification is part of the cumulative record of regulatory coordination.

🔧 Operator Pattern

Devon Energy Williston (operating as Grayson Mill Operating in some filings) demonstrates a standardized approach to multi-well pad development in the Ragged Butte field. The operator secures phased drilling waivers, offsets routine well logging via nearby offset wells, and pre-approves completion design variances (tubing/packer exceptions) before spud. The well file shows consistent use of mud logging contractors (Core Geologic, LLC) and standardized drilling execution (7-day total well delivery via small-rig surface casing followed by full-depth conventional drilling).
Five wells on the Stallion East Pad (Stallion 33-28 5H, 3H, 6H, XE 1H; Sanders 34-27 5H, 6H per 1-mile radius map and project title sheets) share common pad location, operator, and design approach. The mud logging report for Stallion 33-28 6H references offset well Stallion 33-28 3H (NDIC File #35843) within the same pad cluster. All wells use Middle Bakken target, setback-constrained geometry, and saltwater brine mud in the lateral section. The filing structure (single spud waiver + multiple completion design waivers submitted on same date, 03/18/2025) reflects operator's standardized pre-approval workflow.

Confidence: High
The well file contains explicit, signed permit approval documents with effective dates (APD stipulations, all sundry waivers dated 03/18–03/21/2025), a detailed mud logging report with drilling dates and formation tops, well location plat with measured coordinates, directional survey data, and regulatory correspondence (Department of Mineral Resources letters, NDIC notification affidavit). All material permit-cycle signals—SOD waiver, filter sock waiver, openhole log waiver, tubing/packer waiver—are explicitly approved and dated before spud (05/08/2025). The mud logging report provides independent post-drilling documentation of wellbore execution within the approved parameters. No significant gaps or ambiguities exist regarding the permit justification or regulatory basis for approval. The only missing element is the explicit date of the final APD permit approval itself; however, the operational record (spud 05/08/2025 directly following effective dates of all supporting waivers) confirms approval was issued in compliance with regulatory timing.