🛢️ RELLA W 5303 13-18 2B

OASIS PETROLEUM NORTH AMERICA LLC · Williams County, ND · File #42344 · Generated 2026-08-22 00:53

API: 3310506707
Target Formation: Middle Bakken
Confidence: High

📊 Signals (6)

Tier	Signal	Date	Service Impact
Tier 2	Operator requested and received approval for suspension of drilling for up to 90 days to use a smaller rig for surface hole only, then move off and bring larger rig within 90 days to complete drilling.⏰ TIME-SENSITIVE 📄 WELL SUNDRY FORM - Sundry Type: Request for Consideration/Waiver Reveals a staged, cost-saving drilling strategy that creates two distinct rig mobilization/demobilization events and a 90-day window for larger rig services.	2025-11-19	Drilling Rigs
Tier 2	Operator declared use of a 'wet shoe' liner configuration (400' uncemented annulus at toe) to enable pump-down wireline perforating for first stage, avoiding more expensive tubing/tractor methods. 📄 Full Well Details section - Discussion of 'Standard Wet Shoe' Explicit design choice to reduce completion cost for stage 1, indicating preference for wireline services over tubing-conveyed or tractor methods.	Unknown	Completions / Frac
Tier 3	Motor failure at 25,580' MD in lateral required TOOH and ~21.5 hour downtime before resuming drilling. 📄 Sample Descriptions - notation at 15 \| Page Downhole motor failure in lateral indicates equipment stress, potentially leading to additional motor runs, fishing operations, or BHA redesign.	2025-12-25	General Oilfield Services
Tier 3	Drilling plan includes a trip out of hole (TOOH) at 10,892' MD due to build rate issues during curve, with resumed building after a ~17.5 hour delay. 📄 Geological Summary - Curve section Unplanned operational disruption indicates directional drilling challenges, potentially requiring BHA changes or additional directional supervision.	2025-12-20	Directional Drilling
Tier 3	NDIC reviewer imposed condition: 'surface holes are not to be intentionally deviated' due to potential severe casing wear during vertical/curve drilling. 📄 WELL SUNDRY FORM - REVIEWER COMMENTS Regulatory restriction on surface hole deviation indicates awareness of casing wear risks, potentially influencing BHA design and directional drilling approach.	2025-11-19	Directional Drilling
Tier 3	NDIC required specific sample collection protocol: 30' intervals in vertical/build, 200' in lateral, with shipment to state core library within 30 days of drilling completion.⏰ TIME-SENSITIVE 📄 Letter from Ross Edison, Geologist, ND Geological Survey Regulatory mandate with strict timeline for sample handling and shipment, not standard for all wells.	2025-09-29	General Oilfield Services

💡 Operator Intent

Optimize capital efficiency by using a smaller, cheaper rig for surface hole only before mobilizing larger TD rig.

Sundry request states intent 'to take advantage of the cost savings and time savings of using an initial rig that is smaller than the rig necessary to drill a well to total depth.'
Minimize completion costs for first stage through design choices favoring wireline over more expensive methods.

Documentation of 'wet shoe' configuration explicitly states purpose is 'avoiding the more expensive option of perforating on tubing or with a tractor.'
Aggressively manage anti-collision risks in dense drilling environment with multiple offset wells.

Anti-collision statement details multiple precautions including real-time corrected surveys, 1.2 separation safety factor, and increased survey frequency near lateral crossings.

🔧 Service Operator Relevance

Directional Drilling / MWD Services

Curve section experienced build rate issues requiring TOOH and directional challenges; motor failure in lateral indicates potential need for additional directional tools and supervision.

Rig Mobilization/Demobilization & Logistics

Staged rig strategy creates two separate rig moves: small rig for surface hole (3-5 days), then larger rig within 90 days. Time-sensitive opportunity for rig transport and site preparation services.

Sample Handling & Shipping

Regulatory requirement to wash, dry, package, and ship cuttings to state library within 30 days of drilling completion creates immediate post-drilling service window.

Casing & Cementing Services

Specific centralizer program detailed (27 centralizers for 7" casing), wet shoe configuration, and regulatory prohibition on surface hole deviation all indicate focused attention on casing integrity.

Wireline Perforating

Wet shoe design specifically enables pump-down wireline for first stage, creating opportunity for wireline services during completion phase.