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The Offset Well Fallacy
Offset well analysis is often treated as a proximity lookup when it should be a disciplined pre-well practice. This article makes the case for offset analytics as evidence: querying the archive by trajectory, geology and recurring problems, not by which wells sit nearest on the map.

William B. Contreras
17 hours ago12 min read


WillCo Drilling Intelligence - Edition 23: Drilling Automation Moves to Fleet Scale
Drilling automation is moving from individual tasks toward fleet-scale deployment. Halliburton and GeoPark won back an average 3.7-4.5 hours per well with automated connections on 12 wells in Colombia's Llanos Basin, Patterson-UTI rolled basin-specific auto driller tuning out to more than 50 rigs, and SLB put more than 750,000 ft of automated drilling on the record. Also inside: the weight-on-bit zero under the loop, and the register every automated system should carry.

William B. Contreras
5 days ago11 min read


Which Model Made That Call, and Is It Still Right?
A model can remain confident after its operating context has changed. This article explains how provenance, validation envelopes, drift monitoring, and authority controls make drilling automation defensible.

William B. Contreras
Oct 2612 min read


WillCo Drilling Intelligence - Edition 22: Rig Time Back as the Stop Leaves the Loop
The decision loop is moving closer to the bit. Gunnar Energy Services reported roughly two weeks of rig time saved on one US intercept by ranging from inside the drill string, and SLB and Valeura Energy cut survey-related rig time 78-89% on two Gulf of Thailand wells. Also inside: at-bit images, offset risk in the live loop, and control inside the BHA.

William B. Contreras
Oct 2210 min read


WillCo Drilling Intelligence-Field Review 1, October 2026
The barrier decides the outcome. The first monthly WillCo Field Review grades twelve field stories, A to U, on the evidence behind them: a gel-tuned lead slurry in more than ten Iraqi wells, four external casing packers on a Pakistan liner, 57 wells abandoned rigless in 326 days, and Eavor's Geretsried setback, traced to poor cement on both mother bores. Each story carries a WillCo Perspective.

William B. Contreras
Oct 2015 min read


Where Did That Number Come From? Provenance and Lineage for Rig Data
Building a defensible chain of custody from sensor to decision.

William B. Contreras
Oct 1810 min read


WillCo Drilling Intelligence - Edition 21: Digital Well Planning at Portfolio Scale. Oct 12 - Oct 18, 2026
The unit of digital-drilling adoption is moving from the well to the portfolio. Edition 21: SLB will deploy DrillPlan across TotalEnergies' global upstream portfolio under a 15-year agreement; ExxonMobil and H&P plan to take FlexRobotics from 2 to 9 rig-floor systems within 12 months; an Aramco and SLB paper automates survey QC; and an SPE view keeps engineers on final approval.

William B. Contreras
Oct 147 min read


Clean Once, Trust Everywhere: Rig Data Cleansing as a Single Source of Truth
Rig data is often cleaned separately by every application. This article proposes one governed quality service that preserves raw evidence and serves trusted data.

William B. Contreras
Oct 1214 min read


WillCo Digital Drilling Intelligence - Edition #20: The Seam Is the New Bottleneck. Oct 5 - Oct 11, 2026
The next digital bottleneck in drilling is the handoff, not the stage. Edition 20: Vår Energi compresses well-concept maturation from weeks to days by re-engineering how disciplines hand off work; a downhole motor-diagnostics study pushes fault detection toward the sensor; Nabors folds managed pressure drilling into its rig operating system; and Valaris earns a barrier-assurance award for BarrierPulse. Plus Fervo's Cape Station commercial operation and a GA Drilling hard-rock

William B. Contreras
Oct 612 min read


Security at the OT/IT Boundary: Protecting the Rig's Network as Models and Data Cross It
Every data path in this series crosses the OT/IT boundary. How to protect the rig's network as models and data cross it, without opening a backdoor to control.

William B. Contreras
Oct 515 min read


WillCo Digital Drilling Intelligence - Edition #19: Drilling Automation at Scale. Sep 28 - Oct 4, 2026
This week the test for drilling automation shifted from 'does it work' to 'does it hold across hundreds of wells.' SLB won four multi-year integrated well-construction contracts from Aramco covering more than 450 wells; WesCan steered a seven-leg multilateral to TD in 13 days; Fervo reported first power at Cape Station; Zefiro drilled a first carbon-storage well by redeploying a plugging crew; and a new patent application puts +/-10,000 lbf on a quiet weight-on-bit error. Sca

William B. Contreras
Sep 309 min read


Reevaluating the RTOC: From Watching Screens to Intelligent Anomaly Detection
A practical architecture for shifting drilling RTOCs from continuous screen watching to contextual anomaly detection, human adjudication, and governed response.

William B. Contreras
Sep 2816 min read


WillCo Digital Drilling Intelligence - Edition #18: Automation Is Becoming Infrastructure. Sep 21-27, 2026
Halliburton's multi-year Eni contract for the Cronos development bundles automation and remote operations into the well-construction scope, while deepwater managed pressure drilling standardizes inside the rig operating system. This week, automation stops being a pilot and becomes infrastructure.

William B. Contreras
Sep 2312 min read


One Rig Data Fabric: Connecting High-Frequency Edge Analytics to WITSML and Federated Learning
How a rig-side data fabric can preserve useful high-frequency data, run engineering analytics locally, publish contextualized WITSML outputs, and support governed federated learning.

William B. Contreras
Sep 2117 min read


WillCo Digital Drilling Intelligence - Edition #17: Decision Trust in Drilling Automation. Sep 14 - Sep 20, 2026
Edition 17 argues the next autonomy bottleneck in drilling is decision trust: the confidence to act on a model's output. Corva reports up to 1.2 rig days saved on predictive bit-wear in Oman, YPF renews its real-time program, and Aquila Engineering's Iris cuts BOP troubleshooting from hours to under five minutes. The through-line: validation, accountability, and human oversight as engineering.

William B. Contreras
Sep 1611 min read


Beyond WITSML: Turning High-Frequency Rig Data into Edge Decisions
How Modbus, OPC UA, and edge computing turn high-frequency rig data into control-floor decisions, and why drilling still lacks a common control-layer standard.

William B. Contreras
Sep 1417 min read


WillCo Drilling Intelligence - Edition #16: Drilling Automation Interoperability. Sep 7-13, 2026
The hard problem in drilling automation has moved from the algorithm to the interface. H&P released a standardized RSS-downlink API schema to the D-WIS interoperability workgroup, Mazama Energy reported an 80% cut in drilling days on its Athena geothermal well, and Baker Hughes, SLB, and Nabors each placed integration bets across mature-field AI, offshore CO2 storage, and deep geothermal.

William B. Contreras
Sep 910 min read


From Rig Data to Drilling Autonomy: What the Drilling Data Standards WITS, WITSML, ETP and OSDU Actually Do
WITS, WITSML, ETP and OSDU each do a different job for drilling data. Here is what each one standardizes, and why the data layer, not the algorithms, is the real foundation beneath drilling autonomy.

William B. Contreras
Sep 819 min read


WillCo Digital Drilling Intelligence - Edition #15: Offshore Drilling Automation. Aug 31 - Sep 06, 2026
The through-line this week: named commitments are replacing pilots. bp awards Halliburton an integrated drilling and evaluation contract with LOGIX automation on the Bumerangue appraisal offshore Brazil; NOV and Well ID report real-time borehole imaging and caliper data through wired drill pipe; and FutureOn, Elementz and DNV move integrity work into structured decision tools.

William B. Contreras
Sep 213 min read


Wired Drill Pipe: The Telemetry Ceiling on Autonomous Drilling
On most rigs the bit talks to surface at a few to a few dozen bits per second. Wired drill pipe lifts that telemetry ceiling: what it enables and its cost.

William B. Contreras
Sep 112 min read
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