Connectivity and Interference Testing 

Connectivity and interference testing are used to evaluate pressure communication between wells completed in the same reservoir or connected zones. During these tests, one well is produced or shut in while pressure response is monitored in offset wells using downhole or surface gauges. A measurable pressure change in the observation well indicates hydraulic communication through the reservoir. 

The timing and magnitude of the pressure response provide insight into reservoir continuity, permeability distribution, and the presence of flow barriers. Delayed or weak responses may indicate partial connectivity, low permeability, or compartmentalization, while the absence of any response suggests isolated reservoir blocks or sealing faults. 

Interpretation Outputs 

• Confirmation of hydraulic connectivity between wells and reservoir intervals. 

• Identification of reservoir barriers, baffles, or flow compartments. 

• Improved understanding of reservoir continuity and effective drainage patterns. 

• Technical input for optimizing well spacing, infill drilling, and field development planning. 

Typical Well Test Interpretation Deliverables 

A complete well test interpretation integrates measured data, pressure-transient analysis, and engineering judgment. Typical deliverables include the following: 

• Estimated reservoir pressure and temperature at test conditions. 

• Reservoir permeability and flow capacity (k and kh). 

• Skin factor and assessment of near-wellbore condition, including damage or stimulation effects. 

• Productivity index for oil wells or deliverability parameters for gas wells. 

• Identification of reservoir boundary type, distance to boundaries, and degree of reservoir confinement. 

• Estimated drainage area and inputs required for reserves and volumetric calculations. 

• Clear recommendations for stimulation, recompletion, production rate selection, or further data acquisition.