HOW IT STARTED
Shaped charge factories frequently perform steel target shooting tests. After perforation, there are often traces of powder residue on the steel target from the shaped charge’s metal shell. This “umbrella tail” of the perforation jet has a speed of 1000-2500 m/s, while the speed of the front-end of the jet is 6000-8000 m/s.
Placing a donut-shaped propellant cap on the front-end of the shaped charge meant that the jet should pass through the cap hole and the umbrella tail would bring the propellant into the perforation tunnel.
After the shaped charge jet perforates the formation, the propellant material is pushed into the perforation tunnel where it deflagrates continuously. The energy released by the deflagration will apply directly to the perforation tunnel, creating a fracture network without damage to the wellbore and casing. The working mechanism, the pressure transfer between the wellbore and formation, and location of propellant deflagration are ultimately different from that of other perforation methods.
CoFrac™ Technology is the first of many high-tech well completion solutions that ARECO looks to introduce to the O&G Industry.