Coupled Geomechanical Analysis of Parent–Child Well Interactions and Production Optimization Using Sealed Wellbore Pressure Monitoring (SWPM)

Hydraulic fracturing in unconventional reservoirs with closely spaced horizontal wells often results in complex interactions between existing (“parent”) wells and newly drilled (“child”) wells. These interactions, commonly referred to as frac-hits, are driven by depletion-induced stress changes around the parent well, which can alter fracture propagation, impact well performance, and reduce overall recovery efficiency.

This study presents an integrated modeling workflow that couples three-dimensional hydraulic fracture simulation, reservoir flow modeling, and geomechanical stress evolution, with calibration using Sealed Wellbore Pressure Monitoring (SWPM). The workflow captures the full lifecycle of parent-child well interactions, including depletion-driven stress redistribution, fracture propagation, and inter-well communication. 

The methodology is applied to a field case in the Eagle Ford Formation, where production from the parent well creates localized pressure depletion and stress anisotropy. These conditions lead to preferential fracture growth from the child well toward the depleted region. By integrating SWPM diagnostics, the model is calibrated against observed pressure responses, enabling quantitative estimation of fracture half-length, height containment, and cluster efficiency.

Results show strong agreement between field measurements and simulation outputs. SWPM-derived Volume to First Response (VFR) data provides a direct link between injected fluid volume and fracture propagation, allowing validation of fracture geometry and growth behavior across both lateral and vertically stacked wells.

Why This Matters

This study demonstrates how integrating physics-based simulation with field diagnostics can significantly improve understanding of fracture-driven interactions in unconventional reservoirs.

The workflow provides a quantitative, field-calibrated framework for:

• Optimizing well spacing and completion design 
• Reducing frac-hit risk 
• Improving fracture containment 
• Enhancing long-term recovery