The Approach
Most emissions numbers are estimates. Ours are measurements.
The great majority of reported oil and gas emissions come from emission factors: a published number multiplied by a component count. It is fast and cheap, and for routine reporting it is often the weakest part of the inventory.
Factors developed on other equipment populations can overstate or understate what your sites actually do, and that error carries into every filing, disclosure, and counterparty conversation that draws on the number.
Measurement fixes it at the source. Ground-up measurement of the sources that dominate your inventory gives you a reporting basis you can defend. For operators who need more, top-down site measurement adds a second layer that checks the whole.
IES puts instruments on your sites, quantifies what is actually coming out, and produces documentation that holds up under third-party review.
The core capability
Top-down / bottom-up reconciliation
Ground-up measurement is the baseline. Top-down measurement is the layer above it.
A bottom-up inventory sums every source you know about. A top-down measurement captures what the site emits as a whole. They rarely agree, and the gap is usually the events between measurements.
Other Large Release Events are the largest single driver of that gap. They are also the first thing that has to be reconstructed when a super-emitter notification arrives. An operator who cannot produce an event timeline is left arguing against a detection with nothing but an emission factor.
The full emission profile is also what makes third-party data usable. Flyover surveys and satellite detections arrive as a rate at a moment in time, with no context for what the site was doing. Set against a documented event record, a detection usually resolves into something specific and explainable.
The frameworks are converging here. The GTI Energy Veritas protocols separate sources best measured from those best calculated, because infrequent events fall below aerial detection limits. OGMP 2.0 Level 5 and the EU Methane Regulation's MRV framework both require the reconciliation that results. The same work answers state programs, certification schemes, and lender diligence.
Deliverables
What You Get
- A written measurement plan before anyone goes to the field, including site selection, source coverage, methods, and QA/QC
- Field data with chain-of-custody and instrument calibration records
- Quantified emissions by source and by site
- Reconciliation against your existing inventory, with the gap explained rather than smoothed over
- A report formatted for the program you are reporting into
Recommendations on which findings are worth acting on