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Single-well Pressure Pulsation survey
Motivation
One of the most important objectives of the well testing is to assess the drainable hydrocarbon reserves and reservoir properties around tested well.
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- Assess reservoir volume around well
- Assess reservoir permeability and thickness variation around well
Deliverables
The advantages of SPT deliverables over conventional single-well test is illustrated below.
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| Vhc | Potential hydrocarbon reserves |
| Ve | Drainage volume |
| Ae | Drainage area |
| knear | Permeability of the near-reservoir zone |
| hnear | Effective thickness of the near-reservoir zone |
| kfar | Permeability of the far-reservoir zone |
| hfar | Effective thickness of the far-reservoir zone |
| S | Skin-factor |
| Pu(t) | Deconvolution of the long-term unit-rate response |
Inputs
| Property | Description | Data Source | ||||
|---|---|---|---|---|---|---|
| Bo | Oil Formation Volume Factor | PVT samples / Correlations | ||||
| Bg | Gas Formation Volume Factor | PVT samples / Correlations | ||||
| Bw | Water Formation Volume Factor | PVT samples / Correlations | ||||
| co | Oil compressibility | PVT samples / Correlations | ||||
| cw | Water compressibility | PVT samples / Correlations | ||||
| cg | Gas compressibility | PVT samples / Correlations | ||||
| cr | Rock compressibility | Core samples / Correlations | ||||
| swi | Initial water saturation | Core samples | ||||
| Porosity | Core samples |
Procedure
The typical SPT procedure is brought on Fig. 2.
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It would be extremely difficult to perform this manually and usual practice is to arrange a programmable remote-controlled flow variation.
Model
Interpretation
Automated flowrate-pressure fata records match in multiphase 2D pressure simulator with:
- Single well and circle boundary
- High density LGR (meters)
- High density time grid (seconds)
References
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| Show If | ||
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Gavrilov_Self_Pulse_Testing.pdf |
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