🛢️ TUNNOCK 5303 12-2 3B

OASIS PETROLEUM NORTH AMERICA LLC · Williams County, ND · File #42927 · Generated 2026-08-22 01:46

API: 3310506830
Target Formation: Middle Bakken
Confidence: High

📊 Signals (8)

Tier	Signal	Date	Service Impact
Tier 2	Wet shoe configuration detailed: 400 ft uncemented annulus at liner toe, over-displaced by 7 bbls to enable wireline pump-down of first stage guns. 📄 Wet Shoe section, Wellbore Schematics Specific, non-standard cementing/completion design to enable cost-effective toe initiation, directly linked to permit condition.	Unknown	Completions / Frac
Tier 2	Approval conditional on 150' north/south and 500' east/west setbacks within 2560-acre spacing unit, with south setback based on production liner cemented in lateral with wet shoe and ability to frac out the shoe. 📄 Stipulations section, Page 1 Specific, non-standard setback conditions tied to a unique wellbore construction (wet shoe) and completion technique, indicating regulatory negotiation and tailored design.	Unknown	Completions / Frac
Tier 3	Drill-back notification affidavit certifying email to Devon Energy on 2/11/2026 regarding wellbores entering Bakken outside target spacing unit. 📄 Affidavit Affirming Drill-Back Notification Formal, notarized compliance with drill-back policy, revealing interaction with specific competitor (Devon) and advanced regulatory diligence.	2026-02-11	General Oilfield Services
Tier 3	Anticipated commencement date: Jul 15, 2025.⏰ TIME-SENSITIVE 📄 Anticipated Starting Dates, Section 1.8 Explicit start date provided in planning documents, indicating firm operational timeline.	2025-07-15	General Oilfield Services
Tier 3	CBL required on 9-5/8" intermediate (Dakota water string) prior to setting 7" casing, plus standard CBL on 7" casing. 📄 Page 2 Extra cement bond log requirement on intermediate string beyond standard practice, indicating heightened regulatory scrutiny on aquifer protection.	Unknown	General Oilfield Services
Tier 3	Operator must contact NDIC Field Inspector Jessica Gilkey prior to location construction.⏰ TIME-SENSITIVE 📄 Construction Commencement Notification, Page 1 Explicit, named inspector pre-approval requirement for pad construction, not just spudding.	Relative	General Oilfield Services
Tier 3	Waiver requested for proposed logs (Acoustic, Cased Hole, etc.) via separate sundry notice. 📄 Geologic Information / Proposed Logs, Page 3-4 Operator intends to forego standard open-hole logging suite, requiring regulatory approval.	Unknown	Regulatory / Permitting
Tier 3	Perimeter berm required, closed mud system with no cuttings pit, remote/automatic shutoff devices required on all equipment. 📄 Permit Review Policy, Page 1 Bundled, stringent environmental and safety controls mandated as permit conditions.	Unknown	Mud / Fluids

💡 Operator Intent

Optimize completion cost and efficiency by employing a wet shoe design to avoid tubing-conveyed or tractor-based toe perforation.

Wet shoe configuration description explicitly states purpose: 'allows the operator to pump-down the first stage perforating guns on wireline, avoiding the more expensive option...'
Minimize evaluation costs by waiving standard open-hole logging suite.

Proposed logs section shows 'Request Waiver' for multiple log types, with note that waiver must be requested via separate sundry.
Execute multi-well pad development with precise anti-collision management.

Detailed anti-collision statement, named offset wells, and inclusion of pad layout showing multiple wellbores (TUNNOCK 2BX, 3B, 4B, 5B, JAFFA series).
Adhere to aggressive regulatory and operational timeline.

Specific anticipated start date (Jul 15, 2025), mandatory pre-construction inspector contact, and detailed drill-back notification affidavit with specific dates.

🔧 Service Operator Relevance

Cementing & Downhole Tools

Wet shoe design requires precise cement over-displacement and specific shoe/joint equipment; regulatory conditional approval is tied to this design.

Wireline & Perforating

First-stage perforations planned via wireline pump-down enabled by wet shoe; timing aligns with completion after drilling (~30 days post spud).

Pad Construction & Earthwork

Mandatory pre-construction inspection by named NDIC inspector; perimeter berm, closed mud system, and detailed cut/fill specs require specialized contractors.

Drilling Fluids & Waste Management

Closed mud system with no cuttings pit mandated; dry cuttings must go to licensed disposal facility from pre-approved list.

Directional Drilling & Surveying

Complex anti-collision environment with many offset wells; operator uses real-time corrected surveys and gamma ray for collision avoidance.