🛢️ TUFTO 6-7-18-19F 5H

DEVON ENERGY WILLISTON, L.L.C · Williams County, ND · File #3310506799 · Generated 2026-02-13 12:33

API: 3310506799
Target Formation: Bakken
Permit Explained: Yes

📋 Permit Cycle Assessment

The permit approval is substantiated by regulator-issued stipulations and conditions of approval that directly address well-specific risks and constraints. Non-routine conditions are justified by: (1) Mowry Formation penetration risk requiring surface casing restrictions and continuous mud logging; (2) multiple mandatory cement bond logs tied to casing isolation requirements; (3) aquifer proximity requiring closed mud system and impermeable liner; (4) off-spacing lateral geometry requiring directional drilling constraints and specific approved directional points within the multi-section spacing unit; and (5) environmental protection measures (berm, spill plan, rodent hole procedures). All material conditions are time-bound to the 02/06/2026 approval date and constitute regulator approval orders, not routine APD boilerplate. Pre-permit operator submissions (directional plan, notification to adjacent operators, landowner affidavits, dwelling proximity notices) are referenced in permit conditions and satisfy statutory requirements under NDIC Order 31973 and NDCC 43-02-03-16.

🔍 Permit Cycle Signals (5)

Surface casing (17-1/2 inch and 13-3/8 inch) must not penetrate Mowry Formation; mud logger required on-site from ground level to total depth at no greater than 30-foot sample intervals; no intentional deviation permitted in surface casing portion.

Direct

📄 Conditions of Approval section, page 2
📅 02/06/2026 (Exact confidence)

Regulator-imposed drilling constraint tied to specific formation penetration risk; directly conditions wellbore construction approval.

Cement Bond Log (CBL) required on deep-set 13-3/8-inch surface casing with zero-pressure pass; CBL required on 9-5/8-inch intermediate (Dakota water string) prior to setting 7-inch casing; standard CBL required on 7-inch casing. Adequate time must be allowed between cement pumping and CBL running for compressive strength verification.

Direct

📄 Conditions of Approval section, page 2-3
📅 02/06/2026 (Exact confidence)

Regulator-mandated testing and verification protocol for multiple casing strings; non-standard requirement beyond routine cementing compliance (NDAC 43-02-03-21).

Well bore not isolated by cement must maintain 150-foot setback from north and south boundaries and 500-foot setback from east and west boundaries within 2560-acre spacing unit (Sections 6, 7, 18, 19, T155N, R100W). Directional points specify minimum 624 feet south and maximum 1459 feet east from wellhead at 7-inch casing point; maximum legal coordinates at total depth 21,428 feet south and 1459 feet east.

Direct

📄 Stipulations section and Conditions of Approval section, pages 1-3
📅 02/06/2026 (Exact confidence)

Non-routine directional geometry constraints tied to specific spacing unit boundaries and off-spacing lateral placement; approved directional points provided by regulator condition approval.

Aquifer stipulation: Site inspection required prior to spudding; Closed Mud System with no drilling pit; impermeable liner required on entire location.

Direct

📄 Stipulations section, page 1
📅 02/06/2026 (Exact confidence)

Regulator-imposed operational constraint tied to aquifer proximity risk; waiver from standard mud system practices required regulatory justification.

Perimeter berm required around location and spill contingency plan must be in place prior to spudding. Rat, mouse, or mouse hole drilled must be constructed with casing string and cemented to ground level; all such holes must be plugged with cement and cut off at least 4 feet below final grade within reasonable timeframe after drilling completion.

Direct

📄 Conditions of Approval section, page 2
📅 02/06/2026 (Exact confidence)

Regulator-imposed environmental and wellbore integrity controls; spill contingency and rodent hole protocols condition operational approval.

📖 Historical Context (3)

Operator (Devon Energy Williston, LLC) is operator of adjacent spacing unit; notified itself under NDIC Order 31973 requirements; committed to directional drilling plan, trajectory details, formation tops, and drilling commencement date coordination.
📄 Email from Emma V. Neigum, NDIC Engineering Technician, and Devon notification letter on file · 📅 Unknown
Self-notification under Order 31973 establishes operator awareness of directional trajectory risk to adjacent spacing unit; commitment to safe operations and regulatory compliance persists through well execution phase.

Landowner (Wade A. Smith & Melissa C. Smith) affidavit confirms awareness of multiple off-spacing wells to be drilled from Tufto North Pad in SW SE Section 31; operator provided notice of operations commencement expected 01/30/2025.
📄 Affidavit of Landowner (notarized) and Devon Energy operational notice letters on file · 📅 Unknown
Landowner consent and notice documented for off-spacing operations; surface use agreement evidenced; ongoing operational proximity constraint (wells near property) remains active during drilling, completion, and production phases.

Occupied dwelling within 1000 feet of proposed wellhead; operator provided written notice to dwelling occupant per NDCC 43-02-03-16; proposed production facilities stated to be located at greater distance from dwelling than wellbore.
📄 Affidavit of notice to occupant of dwelling (notarized) and dwelling proximity notification letter on file · 📅 Unknown
Dwelling proximity constraint (1000 feet threshold) persists through well life; regulator-authorized imposition of conditions on flares, tanks, and treaters under NDCC 38-08-05 remains operative; facility siting relative to dwelling must be maintained as approved.

🔧 Operator Pattern

Devon Energy Williston, LLC operates multi-well pad development in Williams County Bakken spacing unit; executes off-spacing directional drilling from consolidated surface location; demonstrates compliance discipline through self-notification, landowner coordination, and regulatory notice procedures.
Well file documents show operator holding adjacent spacing unit interest, proactive notification under NDIC Order 31973, executed landowner affidavits, formal dwelling occupant notices, and directional plan submission prior to permit approval. Operator assertions in APD affirm acknowledgment of inter-operator notification requirements (2,640-foot completion interval notice), anti-collision procedures, field inspector coordination, and spudding notification protocols.

Confidence: High
Permit approval date is definitive (02/06/2026). Regulator conditions are explicitly stated in standardized permit sections (Stipulations, Conditions of Approval, NDIC Field Order Info). Directional geometry constraints are quantified (setbacks, coordinates, measured depths). CBL and mud logging requirements are prescriptive. Aquifer and environmental controls are site-specific regulatory orders. Pre-permit coordination documents (Order 31973 notification, landowner affidavits, dwelling notices) are present and properly notarized. No missing dates for permit-critical signals. Text extraction is complete despite OCR irregularities in plat and map sections. Historical signals are clearly distinguished from permit-cycle justification.