KS001 – Pneumatic Fracturing
Chemical Incineration Plant, Coffeyville, Kansas
Pneumatic Fracturing (PF) was performed in a dense clay formation at an industrial plant in Northern Kansas. The site was contaminated with VOCs, primarily TCE and tetrachloroethene. Pre and post-fracture extraction tests were performed to evaluate the effectiveness of the Pneumatic Fracturing technology. Fracturing was applied from 7-20 ft. below ground surface (bgs) in discrete 2.25 ft. intervals.
Pneumatic fracture injections were applied in a single fracture well at five intervals between 7 ft. and 20 ft. bgs. The effectiveness of the PF technology was evaluated by comparing pre- and post-fracture air permeability test results, derived from analyzing monitored extraction flow rate and vacuum influence in surrounding pressure monitoring points.
As a result of Pneumatic Fracturing, air permeability was observed to increase by a factor of five. The vacuum radius of influence increased significantly. During pre-fracture extraction testing, several monitor points showed no vacuum radius of influence; however, during the post-fracture testing, a vacuum influence was observed at all but one point and measured as far away as 10 ft. from the fracture well.
Figure 1: Pre & Post-Fracture Extraction Tests