Perforating Inflow Diagnostic (PID Testing)
Perforated Inflow Diagnostics or PID testing is the surface and/or subsurface monitoring of the pressure response following extreme under balanced perforating conditions, using electronic pressure recorders capable of high sampling rates.
State of the Art Data Analysis
Capture valuable reservoir information including:
- Reservoir pressure
- Formation flow capacity
- In-situ permeability
- Wellbore skin
- Unstimulated gas inflow rate potential
- Near wellbore damage conditions prior to the fracture treatment
PID Monitoring Techniques
- TCP (Tubing Conveyed Perforating)
- Memory gauges are dropped from the surface on a perforating drop-bar during tubing conveyed perforating
- E-line (Electric Line)
- Memory gauges are attached to the perforating gun and run in the well on electric line.
Advantages of PID Testing
Provides accurate measurement of very low gas rates in low permeability (tight) gas wells (often reported as too small to measure)
Designed for tight, unconventional gas wells, and coalbed methane wells. A "green well" testing procedure - does not require flaring or venting of natural gas. Allows meaningful reservoir and wellbore information to provide a quick, easy understanding of the reservoir. Saves time and money on costly hydraulic fracture treatments by allowing for more effective completion design. Provides a safe testing environment and ensures privacy.
Data Analysis
Accurate PID analysis will assist an oil and gas company in determining which services may be needed to optimize field production. The results of a PID analysis may mean a substantial savings in time and money!
To view a sample PID graph click here.