Services · Production wells

Production well test analysis (PBU)

Every shut-in on a producer is free reservoir data. We turn planned and opportunistic build-ups into a low-cost surveillance tool — tracking performance, explaining deviations and targeting interventions.

Production well surveillance

Why it matters

A rate and a pressure don’t define productivity

Because the response is transient, a single rate–pressure pair can’t tell you how a well is really performing — especially vertical wells in low-to-mid permeability, fractured wells and horizontal wells. A build-up can.

  • Define initial well and completion performance: skin, permeability, connectivity, initial pressure
  • Monitor and forecast well and reservoir performance over time
  • Detect performance deviations early and understand their causes
  • Assess the real impact of well interventions
  • Quality-control your rate measurements

With the right expertise, every shut-in becomes a data point in your surveillance plan — not just downtime.

What we deliver

From new wells to mature producers

New well delivery

  • The case for downhole gauges and planned shut-ins
  • Data systems that don’t destroy transient data through “compression”
  • Planned shut-ins designed for maximum information in minimum time

Ongoing surveillance

  • Damage, effective kh, perforated height and horizontal flowing length
  • Fracture half-length and conductivity over time
  • Reservoir pressure, connectivity and pressure support
  • Multiphase flow analysis

Diagnosing deviations

  • Water-front detection and breakthrough anticipation
  • Fluid breakout caught before it becomes irreversible
  • Blockage, sand fill and other near-wellbore problems
  • Data acquisition around interventions — and proof of their impact

Planning a well test?

Design a test that answers your questions

Tell us your objectives. We’ll design a test that meets them with minimum rig time and flaring — and support you during operations.

Already have pressure & rate data?

Get it analysed by specialists

Need an interpretation, a re-analysis with deconvolution, or a second opinion on an existing report? Send us the data securely and we’ll tell you what it can reveal.

Contact

Want more from your production shut-ins?

Tell us about the well, your objectives and your timeline. You’ll hear back from one of our specialists.

support@testwells.com

+44 20 3769 0017