neqsim-reservoir-model-builder

Reservoir Model Builder

Use this skill to turn whatever reservoir data is available — from a single public headline volume to a full static-model parameter set — into a coherent, runnable screening reservoir model, and to refine that model as better data arrives without losing track of what came from where.

The central idea is a data-maturity ladder. Every number in the model carries a provenance label, so the model can always answer three questions:

1. What did we actually know?
2. What did the builder assume on our behalf, and from what basis?
3. Which missing measurement would most reduce the uncertainty?

When to Use

• A reservoir model is needed for a field where only open data exists (public resource pages, an approved development plan summary, a discovery announcement).
• Volumetrics must be built from area, net pay, porosity and water saturation, or an in-place volume must be back-calculated from a reported recoverable volume.
• Reservoir pressure and temperature are unknown and must be defaulted from depth using a hydrostatic gradient and a geothermal gradient.
• A recovery factor and a drive mechanism must be inferred from fluid type, aquifer strength and injection plan.
• A well count and a productivity index must be estimated from permeability and net pay before any well test exists.
• An existing screening model must be refined with new logs, a well test or a PVT report, with an auditable record of what changed.
• There is no subsurface data at all and a model still has to be built: no seismic, no logs, no contacts, only a published resource number and a development description. See "Building a model when there is no subsurface data at all" below — assume the play-typical structure, solve the contact and the compartment split against the published numbers, place the wells on the structure, and publish the assumption register.
• A NeqSim SimpleReservoir / WellFlow set-up or an MCP runReservoir payload is needed as the next step.