🛢️ Dunlin 5892 31-33 5B

Oasis Petroleum North America LLC · Mountrail County, ND · File #42739 · Generated 2026-04-04 15:56

API: 3306105656
Target Formation: Middle Bakken
Permit Explained: Yes

📋 Permit Cycle Assessment

The permit approval dated 2026-02-27 is contemporaneously supported by anti-collision analysis (2025-12-02), surface use agreement affidavit (2026-02-26), and off-spacing notification waiver request (2026-01-06). Commission Order No. 34892 conditions approval on setbacks directly tied to the well's wet-shoe completion design, documented in the submitted horizontal drill plan. Anti-collision risk (Level 3 separation to adjacent DUNLIN 5892 31-33 4B) is mitigated through industry-standard separation factors and survey frequency protocols. The off-spacing wellbore geometry and reduced west setback are structurally justified by the production liner design and surface use agreement, respectively. All permit conditions reflect evaluated site-specific geometry and operational controls, not routine APD boilerplate.

🔍 Permit Cycle Signals (4)

Commission Order No. 34892 conditions approval with specific setback requirements: 500' setback from north & south boundaries, 150' setback from east & west boundaries within the 2560-acre spacing unit. West setback based on production liner cemented with wet shoe and frac-out capability.

Direct

📄 Permit approval document, page 2, NDIC Field Order Info Stipulation section
📅 2026-02-27 (Exact confidence)

Non-routine setback variance justified by completion design (wet shoe configuration). Directly conditions this permit's approval and differentiates from standard horizontal drilling approvals.

Anti-collision statement submitted and evaluated. Operator reviewed wells within 500' of proposed wellbore. Minimum separation factor of 1.254 (Level 3 warning) identified with DUNLIN 5892 31-33 4B. Industry standard 1.2 separation safety factor maintained during drilling.

Supporting

📄 Anticollision Report dated 12/2/2025; Permit form page 9, operator assertion regarding anti-collision review
📅 2025-12-02 (Exact confidence)

Non-routine collision risk documented. Level 3 warning indicates close approach to adjacent well. Conditioning measure required for this specific well geometry and pad layout.

Surface Use Agreement required and affirmed. Oasis Petroleum as operator of pad location (NW1/4 SW1/4 Section 33) has executed SUA with surface owner (Roberta L. Rystedt). Off-spacing drilling requires landowner awareness per Order 31973 policy.

Supporting

📄 Affidavit Affirming Surface Use Agreement, dated 2026-02-26; Permit form page 7, operator assertion and supporting letter dated 2026-01-06
📅 2026-01-06 (Exact confidence)

Off-spacing wells (Dunlin wellbore enters Bakken outside target spacing unit) require documented surface use agreement. Waiver on adjacent operator notification granted because Oasis is operator of both units.

Wet shoe production liner design with frac-out capability. 4.5-inch P-110 liner from 9191' to 30665' MD cemented to allow uncemented annulus (~400') at toe for stage 1 perforation initiation. Design explicitly cited in permit conditions as justification for west setback exemption.

Supporting

📄 Horizontal Drill Plan, section 6 (Completion & Perforation) and Facility Statement; Permit page 2, west setback stipulation
📅 Unknown (Inferred confidence)

Completion design directly justifies regulatory departure (reduced west setback). Non-standard configuration permitting closer-to-boundary placement.

📖 Historical Context (3)

Cores and samples collection requirement. Operator must collect sample cuttings from Base of Last Charles Salt at 30' intervals (vertical/build) and 200' intervals (horizontal). Samples due within 30 days; any cores due within 180 days to ND Geological Survey Core Library. Violations subject to civil penalty up to $12,500 per offense (NDAC 38-08-16).
📄 Letter from ND Department of Mineral Resources dated 2026-03-02, referencing NDCC Section 38-08-04 and NDAC 43-02-03-38.1 · 📅 Unknown
Standing operational obligation that persists throughout drilling and post-drilling phases. Failure to submit samples/cores on schedule triggers regulatory penalty exposure. Impacts well record completeness and state repository obligations.

Filter sock disposal container requirement. Covered, leak-proof container with placard required on site from spud through completion and flow-back whenever filtration operations occur. Non-compliance with NDAC 43-02-03-19.2 effective 2014-06-01. Operator may waive via Sundry Notice if no filtration system used.
📄 ND Department of Mineral Resources letter dated 2025-05-30, re: Filter Socks and Other Filter Media · 📅 Unknown
Ongoing site management requirement throughout drilling, completion, and flow-back phases. Affects waste disposal protocols and environmental compliance. Non-compliance constitutes violation of solid waste transport permitting requirements under ND Department of Environmental Quality oversight.

Diesel-based stimulation fluid prohibition. Operator has committed not to use diesel-based compounds (CAS numbers 68334-30-5, 68476-34-6, 68476-30-2, 68476-31-3, 8008-20-6) in hydraulic stimulation fluids. Stated in Horizontal Drill Plan section 10 and Facility Statement.
📄 Horizontal Drill Plan dated 12/8/2025, section 10 (Diesel Based Stimulation Fluids); Facility Statement in compliance materials · 📅 Unknown
Operational constraint on completion and stimulation execution. Restricts chemical selection and fracturing design options. Persists through well completion phase and affects vendor specifications and frac design approvals.

🔧 Operator Pattern

Oasis Petroleum (now subsidiary of Chord Energy) operates multi-well pad development in Enget Lake-Bakken field with standardized completion designs and surface-centralized drilling strategy. Operator is both surface lessor and adjacent unit operator, controlling risk through unified operational oversight.
Single pad (Grove Federal 5892 31-33 PAD) hosts six wellbores: Dunlin 5892 31-33 2B, 3B, 4B, 5B, 6BX and Grove 5892 31-33 wells. Operator executed surface use agreement for off-spacing drilling access. Anti-collision analysis shows operator maintains industry-standard 1.2 separation safety factor and uses certified well planners for AC guidance. Casing design, cementing program, and completion specifications (wet shoe, P-110 liners, invert mud, dual BOP stack) reflect institutional standards across this pad development.

Confidence: High
Well file contains complete permit approval documentation with explicit stipulations, contemporaneous anti-collision analysis, surface use agreement, off-spacing waiver request, and detailed horizontal drill plan. Permit approval date (2026-02-27) is anchored to supporting technical submissions dated within 2 months prior. No missing critical dates in permit-cycle signals. OCR quality is sufficient for regulatory clause extraction. Non-routine signals (wet shoe design, anti-collision Level 3 warning, off-spacing requirement, setback exemption) are clearly documented and cross-referenced between permit conditions and technical plans.