Playbook Rule 3: “Time Your Refracs Before the Window Closes”

The concept is simple: go back into a depleted well, crack open new pathways (or refresh old ones), and recover untapped oil without drilling a new well.

But with refracs, timing is everything.

Wait too long, and the reservoir pressure might be so low that new fracs won’t propagate effectively, or offset wells drilled later might have already drained the prize. Refrac'ing too late is like reopening a mine after the gold rush, as the easy barrels are already gone. On the other hand, refrac'ing too early, when the well is still flush, might waste effort on a well that hasn’t yet declined meaningfully.

Identifying the optimum “refrac window”: The sweet spot in a well’s life is a critical consideration. It typically sits in the middle-to-late stages of primary production, before terminal decline sets in. Miss that window, and you risk refrac'ing a “dead” well for negligible gain.

The unconventional wisdom here is clear: a well-executed refrac can significantly boost EUR and breathe new life into otherwise dwindling assets.        

Simulation: Finding and Acting on the Refrac Sweet Spot: With simulation, users can model a well’s full life cycle, including a potential refracture, to forecast the incremental oil it would deliver at various future points in time. By running sensitivities on timing, engineers can identify when the marginal gain of a refrac is highest.

Simulation can also help avoid interference issues when refrac'ing on multi-well pads. For example, one strategy is to refrac a parent well before drilling child infill wells – a proactive move to boost the parent’s pressure and production and even shield it during the infill fracs. These decisions are ideally backed by modeling: a calibrated reservoir model can estimate how a refrac on Well A will affect – or be affected by – the planned new Well B nearby.

The industry is even using data analytics to guide refracs: machine learning models (trained on past refrac results) flag which candidates meet certain criteria (sufficient remaining oil, pressure, spacing to neighbors, etc.). But raw data alone isn’t enough. That’s where physics-based simulation comes in to validate that a chosen well, at a chosen time, will likely respond. 

If you have a cohort of 5-10 year old wells in good rock, run the simulations now. Figure out the optimal refrac timing, or risk losing the chance forever.