Oil & Gas Upstream Operations · Energy & Utilities
Should you build or buy Drilling & Completions Engineering / Well Planning Software?
Drilling & Completions Engineering / Well Planning Software is the specialized toolset petroleum engineers use to design well trajectories, model wellbore stability, calculate torque-and-drag profiles, size casing strings, and plan hydraulic fracturing schedules before a single foot of hole is drilled. It turns subsurface data and engineering specifications into the detailed well programs that drilling crews and completion teams execute in the field.
The build-vs-buy decision for Drilling & Completions Engineering / Well Planning Software turns on how much proprietary basin knowledge and rig-fleet data an operator has accumulated to calibrate its own physics models, and how far independent teams have actually come at building validated drilling-mechanics solvers; the specifics of both decide it.
Build it, buy it, or bridge?
When building makes sense
Building well planning software is defensible only when the operator has accumulated enough proprietary well data to calibrate physics models that outperform what a vendor carries. Large national oil companies and some major independents have drilled enough wells in specific basins, with consistent rig-fleet configurations, that their internal calibration is genuinely superior for their assets. In that situation, encoding proprietary T&D models, hydraulics calculations, and completion-design rules into internal tools gives a real advantage: competitors cannot see the drilling program, and the models iterate faster than any vendor release cycle allows. The AI feasibility hurdle is real, though. The physics-based solver core — wellbore hydraulics, torque-and-drag, wellbore stability — requires years of validation against actual well behavior. Building that from scratch means years before the tool is trustworthy enough for casing design or mud-weight selection, both of which have safety and cost consequences. The build case is strongest when the operator is extending an existing validated framework rather than replacing it outright.
When buying makes sense
Most operators should buy well planning software because the validated accuracy of established platforms is what makes high-consequence decisions defensible. Halliburton Landmark's Compass and SLB's Petrel well planning modules carry calibration histories across thousands of wells in formations that a single operator rarely encounters at the same scale. That track record matters for casing design, where an error carries significant safety and financial cost, and for regulatory acceptance, where having a recognized platform behind the engineering can smooth approvals. Beyond accuracy, the ecosystem matters: Vendors have built integrations with offset well databases, mud-logging tools, and completion design modules that take years to replicate. For operators with smaller field inventories or without dedicated petroleum engineering software teams, buying is not just faster but safer, since the alternative is relying on unvalidated models for critical wellbore decisions.
The desk read
Torque-and-drag models, wellbore hydraulics calculations, and casing design tools have been refined against decades of calibrated well data. Halliburton Landmark and SLB have accumulated that calibration across thousands of wells in diverse formations. The physics isn't secret, but the validated accuracy of the model against real well behavior is what operators rely on for high-consequence decisions like casing design and mud weight selection. An independent implementation of the same physics equations won't carry the same track record.
The build case exists for operators who have accumulated enough proprietary well data to calibrate their own models and who treat their drilling program as a competitive differentiator. Some large independents and NOCs have built internal engineering tools that encode their specific basin knowledge and rig fleet capabilities. Oliasoft represents a newer entrant trying to modernize the stack, but it remains niche. For most operators, the question is which vendor platform to run and how deeply to integrate it with their subsurface models, not whether to build from scratch.
Frequently asked
What is Drilling & Completions Engineering / Well Planning Software?
Drilling & Completions Engineering / Well Planning Software is the specialized toolset petroleum engineers use to design well trajectories, model wellbore stability, calculate torque-and-drag profiles, size casing strings, and plan hydraulic fracturing schedules before a single foot of hole is drilled. It turns subsurface data and engineering specifications into the detailed well programs that drilling crews and completion teams execute in the field.
When does building Drilling & Completions Engineering / Well Planning Software make sense?
Building is defensible when an operator has drilled enough proprietary wells in specific basins to calibrate physics models that outperform vendor platforms for their assets, and when they have a dedicated petroleum engineering software team to maintain those models. The physics-based solver core takes years to validate, so the strongest build cases involve extending an existing framework rather than starting from scratch.
When does buying Drilling & Completions Engineering / Well Planning Software make sense?
Buying makes sense for most operators because established platforms like Landmark Compass and SLB Petrel carry calibration histories across thousands of wells that no single operator can replicate quickly. For casing design and other high-consequence decisions, the validated accuracy and regulatory acceptance of known platforms reduces risk in ways that an unvalidated self-built alternative cannot match.
What are the main Drilling & Completions Engineering / Well Planning Software vendors?
Representative vendors include Halliburton Landmark (Compass/Engineer), Pegasus Vertex (PVI), SLB (Drillbench/Petrel well planning), Oliasoft. B4 Pro scores the full set.
What distinguishes the newer entrants like Oliasoft from legacy platforms?
Oliasoft and similar newer entrants aim to modernize the user experience and cloud deployment model rather than re-derive the physics from scratch. They are gaining traction with operators who want modern workflows but remain niche compared to Landmark and SLB in terms of formation coverage and validation history.