DepletionSCAN technology is based on a pressure-based fracture map computed using our patented data acquisition and processing. The data source is a surface pressure gauge on a monitor well – established through isolation from prior stages – that records the poroelastic pressure response from a nearby treatment well during hydraulic fracturing. As the treatment well is fracked, our geoscientists and completion engineers identify and quantify the poroelastic signals from the monitor well’s measured pressure response.
We use the poroelastic signals to compute a simple, accurate, affordable pressure-based fracture map by matching the observed responses in the monitor well to a digital twin. The fracture map includes fracture half-length, height, asymmetry, and azimuth and how fast these dimensions grew.
The fracture map shows in real time when a newly created fracture in the child well is affected by a significant depletion zone around a producing well. With the map and DiverterSCAN technology, we can identify challenges, such as asymmetric fracture growth, impaired stimulation, and reduced production from a parent well, when an operator is fracking near a depleted zone.
With this information, you can take timely, corrective action that minimizes or eliminates the effect of frack hits
What is the affect of a depleted zone on fracture asymmetry?
Does a depleted well in one horizon affect the fractures in another horizon?
A Bakken operator called on us to understand the affect of depletion on fracture growth. We computed the fracture growth rates for the heel stages of the four wells using the pressure data. With these data, we quantified in near real time the interaction of newly created fractures with the existing depleted parent well in the upper horizon.
The depleted well caused significant asymmetry in the fracture growth. The asymmetry was observed on wells in both horizons. Wells 1H and 4H, in the same horizon as the depleted parent well, had slightly higher asymmetry while wells 2H and 3H, in the lower horizon, had less asymmetry.
Understanding the fracture growth timing and the degree of asymmetry offered insight into the extent of the depletion and the effect on the wells in both horizons. With DepletionSCAN technology, the operator was able to make informed, better completion decisions about designing the treatment for the later stages.