EnginSoft Partnership
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Fissure case

PROBLEM DESCRIPTION
  • During drilling and completion of hydrocarbons wells, it's common to find natural formation fissures;
  • Problems: Fissures drain drilling fluid and harms the operation control.
  • Solution: Particulate material is injected within the drilling fluid. The objective is to fill the fissures with particles, stopping the drilling fluid drainage.
  • Challenges: Appropriate boundary conditions for problem modeling.
METHODOLOGY
  • Simulate the case with a coupled CFD/DEM approach;
    1. DEM-Solutions EDEM and ANSYS Fluent coupling.
  • Simplified Geometry;
    1. Different domains on each "side" of the simulation.
  • Run cases with different boundary conditions, analyzing the fluid and particulate flow;
  • Estimate the minimum velocity inside the fissure at which particles are dragged into it;
  • Use reservoir data to simulate the well-reservoir coupled problem.
CUSTOMER

Petrobras - Brazil

The simulation results have shown that the particulate injection objective is being achieved, the volumetric flow passing by the fissure is decreasing with particle deposition inside the fissure.

While the particles form a stagnant layer at the bottom of the domain the fluid resistance increases. This is the expected behavior for the fissure filling.

The trend is that the stagnant layer keeps increasing and fills almost the entire fissure channel.