🛢️ TUFTO 6-7-18-19F 1H

Devon Energy Williston, L.L.C. · Williams County, ND · File #3310506795 · Generated 2026-02-13 12:33

API: 3310506795
Target Formation: Bakken Formation
Permit Explained: Yes

📋 Permit Cycle Assessment

The permit approval dated 02/06/2026 is clearly explained by contemporaneous regulatory and operational constraints documented in the well file. Five direct regulatory signals condition this approval: (1) NDIC Order 31973 directional geometry requirement for adjacent spacing unit coordination, (2) on-site aquifer presence requiring closed mud system and impermeable liner, (3) Mowry Formation protection stipulation with continuous mud logging and zero-deviation surface hole constraint, (4) enhanced cement bond log requirements with director escalation protocol, and (5) occupied dwelling proximity requiring 21-31 day advance notice and facilities setback. Each signal is explicitly referenced in permit conditions of approval or operator assertions. The permit approval integrates pre-existing regulatory orders, site-specific environmental and geologic conditions, and nearby occupancy constraints. No gap exists between permit issuance and justifying documentation.

🔍 Permit Cycle Signals (5)

Directional geometry constraints tied to 1220' setback requirement from east and west spacing unit boundaries for coordination with adjacent spacing unit

Direct

📄 Conditions of Approval section; NDIC Order 31973 compliance letter
📅 02/06/2026 (Exact confidence)

Permit approval explicitly conditions lateral trajectory on pre-existing NDIC Order 31973 requirement. Devon, as operator of adjacent spacing unit, must comply with directional drilling notification and setback coordination. This geometric constraint directly shapes the approved wellbore design.

Aquifer location on-site triggers mandatory closed mud system, impermeable liner, and site-specific inspection stipulations

Direct

📄 Aquifer stipulation section; Conditions of Approval (Closed Mud System requirement)
📅 02/06/2026 (Exact confidence)

Permit approval is conditioned on aquifer presence requiring closed loop drilling operations with no drilling pit and impermeable liner on entire location. This is non-routine environmental protection requirement that differentiates this permit from standard horizontal drilling.

Mowry Formation protection stipulation: 17-1/2-inch surface hole must not penetrate Mowry; mud logger required 30' sample intervals; no intentional deviation in surface casing

Direct

📄 Conditions of Approval (Mowry Formation); Cementing requirements section
📅 02/06/2026 (Exact confidence)

Non-routine vertical drilling constraint imposed to protect shallow Mowry Formation. Requires continuous mud logging and zero deviation during surface hole phase. This protective condition is directly cited as approval condition, not standard boilerplate.

Multiple CBL (Cement Bond Log) requirements with zero-pressure pass mandate for 13-3/8-inch, 9-5/8-inch, and 7-inch casing strings; director approval required if unusual pressures encountered

Direct

📄 Conditions of Approval (Cementing requirements)
📅 02/06/2026 (Exact confidence)

Permit approval conditions operational execution on enhanced cement verification. Escalation protocol requiring director approval for pressure anomalies indicates heightened regulatory concern about isolation integrity. Goes beyond standard cementation requirements.

Occupant dwelling within 1000 feet requires notified dwelling owner with 21-31 day advance written notice; production facilities must be positioned at greater distance from dwelling than wellbore

Direct

📄 Operator Assertions section; Notary affidavit dated 06/20/2026; NDCC 43-02-03-16 compliance documentation
📅 02/06/2026 (Exact confidence)

Permit approval is conditioned on proximity to occupied dwelling. Requires timebound notice protocol and spatial separation between wellbore and production equipment. Operational commencement is time-gated to advance notification requirement.

📖 Historical Context (3)

Devon Energy is operator of adjacent spacing unit (Sections 6, 7, 18, 19 - T155N-R100W) subject to NDIC Order 31973 inter-spacing notification and directional coordination protocol
📄 NDIC Order 31973 compliance letter; Operator Information section · 📅 Unknown
Operator's dual-role status (well operator and adjacent spacing unit operator) creates ongoing notification and coordination obligations. Future well activity on this pad or adjacent spacing units triggers pre-drill notification requirements for directional drilling plan, trajectory details, formation tops, and approximate drilling commencement date. This obligation persists beyond current permit and constrains pad development planning.

Well pad supports multiple wells (TUFTO 6-7-18-19F 2TFH and TUFTO 6-7-18-19F 3H noted on well location plat drafted 10/29/2025) from same surface location in SW SE Section 31
📄 Well Location Plat; Production Layout showing multi-well pad configuration · 📅 10/29/2025
Multi-well pad geometry and shared surface location requires anti-collision coordination for future laterals. Wellbore trajectories with maximum legal coordinates at Total Depth (21434' south, 2562' west) establish spatial envelope for subsequent wells. Operator must conduct anti-collision reviews and maintain directional separation to avoid intersection risks on this pad throughout its operational life.

Confidentiality hold on production data for six months from spud date; standard operational reporting requirements (Sundry Notice within 3 business days of spudding, field inspector notification)
📄 Conditions of Approval (confidentiality section); Operator Assertions (spudding notification requirement) · 📅 02/06/2026
Operational reporting cadence and data withholding timeline persist through initial production phase. Operator must execute timely sundry notice filing and inspector contact protocols at spud, then maintain production data confidentiality during six-month hold period. These administrative obligations are binding through production startup and early flowback phase.

🔧 Operator Pattern

Devon Energy Williston, L.L.C. operates multi-well pad strategy in Bakken spacing units with integrated surface infrastructure and advanced directional targeting to optimize lateral density per spacing unit
Well file documents TUFTO North Pad with three horizontal wells (1H, 2TFH, 3H) planned from common surface location. Operator holds adjacent spacing unit operatorship status subject to NDIC Order 31973 inter-unit coordination. Operator assertions confirm awareness of 2,640-foot notice requirement to adjacent operators and anti-collision review protocols. Multiple directional survey points and approval of lateral trajectory extending 21,434' south and 2,562' west from wellhead indicate sophisticated well placement within 2,560-acre spacing unit. Closed-loop drilling commitment and adherence to environmental protection stipulations (aquifer, Mowry) reflect operator compliance posture on recent permits.

Confidence: High
Permit approval date (02/06/2026) and approver name (Nathaniel Erbele, Petroleum Engineer) are explicit and unambiguous. All five permit-cycle signals are directly cited in Conditions of Approval or regulatory orders embedded in the well file. NDIC Order 31973 reference, aquifer stipulation, Mowry Formation protection, CBL requirements, and occupant dwelling notice are documented with specific regulatory citations (NDAC 43-02-03-21, NDCC 43-02-03-16). No material dates are missing. Text extraction is complete for permit terms, operator attestations, and regulatory correspondence. Historical signals are supported by well location plats (dated 10/29/2025, 09/29/2025) and multi-well pad configuration documentation. Separation between permit-cycle justification and historical context is clear and maintainable.