HOW WE STARTED
When a shaped charge detonates, the front-end of the jet (tip) achieves velocity as high as 30,000 f/s, while the trailing end (umbrella tail) travels as slow as 3,000 f/s (Figure 5). With the understanding of these numbers, the concept of placing a propellant cap on the front of the shaped charge and allowing the umbrella tail to bring the explosives into the perforation tunnel was conceived. 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.
The umbrella tail had an ideal directional sense, ensuring it will enter the perforation tunnel already formed by the front-end of the jet.
Tens of thousands of lab tests were conducted to ensure technical integrity. The system is used extensively in low permeability, high-density reservoirs in China, and is currently been deployed in reservoir zones in the USA.
CoFrac™ is the first of many next-generation well completion solutions that ARECO looks to introduce to the O&G Industry.