🛢️ Dunlin 5892 31-33 6BX

Oasis Petroleum North America LLC · Mountrail County, ND · File #42740 · Generated 2026-04-04 15:56

API: 3306105657
Target Formation: Middle Bakken
Permit Explained: Yes

📋 Permit Cycle Assessment

The permit approval (2026-02-27) is explained by four permit-cycle signals: (1) Commission Order 34892 imposing a 150' setback from east/west boundaries and requiring east-west lateral alignment within a 5120-acre spacing unit; (2) regulator reliance on a wet-shoe cement design and fracturable shoe to justify that setback; (3) anticollision analysis demonstrating separations from offset laterals, including one Level 3 warning (1.262 SF) triggering heightened survey frequency requirements; and (4) a waiver from Order 31973 notification requirements because Oasis operates both the drilling location and adjacent spacing unit. These four elements—geometric constraint, completion design justification, collision risk management, and operator-control waiver—directly condition and explain this permit approval.

🔍 Permit Cycle Signals (4)

Commission Order No. 34892 conditioning approval on 150' setback from east & west boundaries and lateral alignment on east-west axis within defined 5120-acre spacing unit

Direct

📄 Permit Information - Stipulations (NDIC Field Order Info)
📅 2026-02-27 (Exact confidence)

Regulator-imposed geometric constraint directly conditioning the permit approval. Non-routine setback requirement tied to multi-section spacing unit geometry.

Production liner cemented with wet shoe and ability to frac out shoe—specified as basis for west setback approval

Direct

📄 Permit Information - Conditions of Approval; Horizontal Drill Plan section 5 (Cementing Program)
📅 2026-02-27 (Exact confidence)

Specific completion design (wet shoe configuration) is explicitly tied to regulatory setback decision. Regulator relies on this technique to justify proximity to boundary.

Anticollision analysis required; operator confirmed 1.2 separation safety factor maintained in intermediate sections; surveys at 93–100' frequency in lateral; gamma ray identification of existing wellbores to avoid collision

Supporting

📄 Horizontal Drill Plan - Anti-Collision Statement; Permit page 9 operator assertions
📅 2026-02-27 (Exact confidence)

Anticollision report summary shows closest approach separations as low as 1.262 SF (Level 3 warning) against GROVE FEDERAL 5892 31-33 2B. Permit approval conditions depend on real-time survey monitoring.

Waiver requested and implicitly approved for notification of adjacent operator under Order 31973 because Oasis is operator of adjacent spacing unit

Supporting

📄 Letter dated 2026-01-06 re: Dunlin 5892 31-33 #2B, #3B, #4B, #5B, #6B; Affidavit affirming Surface Use Agreement executed with landowner
📅 2026-01-06 (Exact confidence)

Horizontal wellbore from off-spacing location enters adjacent pool outside target spacing unit. Waiver removes horizontal-specific notification burden because operator controls both units.

📖 Historical Context (4)

H2S may be present in Mission Canyon Formation; maximum anticipated bottom hole pressure ~5723 psi; maximum surface pressure ~3624 psi
📄 Horizontal Drill Plan section 8 (Abnormal Conditions) · 📅 Unknown
H2S presence and elevated pressures constrain drilling operations, well design (casing grades, cement programs, pressure control equipment), and safety protocols. Persists through completion and flow-back operations.

Cores and samples must be submitted to State Geologist per ND Century Code 38-08-04; samples collected from Base of Last Charles Salt downward at 30' intervals (vertical/build) and 200' intervals (horizontal); civil penalty up to $12,500 per violation
📄 Letter dated 2026-03-02 from ND Mineral Resources (Cores and Samples) · 📅 2026-03-02
Regulatory obligation continues through drilling completion and mandates sample submission within 30 days of completion, core submission within 180 days. Non-compliance triggers per-diem civil penalties.

Filter sock disposal: leak-proof, covered, placarded container required on-site beginning at spud through completion and flow-back operations effective June 1, 2014
📄 Letter dated 2025-05-30 from ND Mineral Resources (Filter Socks and Other Filter Media) · 📅 2014-06-01
Ongoing operational requirement throughout drilling, completion, and flow-back. Violation cited under ND Administrative Code 43-02-03-19.2. Affects waste management logistics and site compliance.

Diesel-based stimulation fluid compounds explicitly prohibited; operator affirms non-use of CAS Registry Numbers 68334-30-5, 68476-34-6, 68476-30-2, 68476-31-3, 8008-20-6
📄 Horizontal Drill Plan section 10 (Diesel Based Stimulation Fluids/Compounds) · 📅 Unknown
Constrains hydraulic stimulation design and fluid selection; persists through completion stage; non-compliance may trigger regulatory action under ND Administrative Code 43-02-03-19.2.

🔧 Operator Pattern

Oasis Petroleum (now Chord Energy subsidiary) operates multiple horizontals on shared pad infrastructure (GROVE FEDERAL 5892 31-33 PAD) and adjacent spacing units; executes off-spacing horizontal drilling requiring surface use agreements and waiver requests.
Permit references five other wells on same pad (Dunlin 5892 31-33 2B, 3B, 4B, 5B); anticollision report lists 18 offset wells within proximity, including GROVE FEDERAL and GROVE laterals controlled by operator; Surface Use Agreement dated 2026-02-26 executed with landowner for off-spacing drilling.

Confidence: High
Permit approval date (2026-02-27) and all conditioning orders are explicit. Order 34892 is cited directly in permit stipulations. Anticollision report is comprehensive with published separation factors. Wet-shoe design is documented in drilling plan with regulator linkage in permit conditions. Waiver request for Order 31973 is dated and justified. All contemporaneous documents (cores/samples letter, filter sock directive, diesel restrictions) are dated and regulatory. No missing dates on permit-cycle signals.