Close Water Contact
Close Water Contact
  • Minimal vertical fracture growth
  • Improve effectiveness spotting acid
  • Fractures stay in pay zone
  • No need to set packers for isolation

Many oil & gas producing formations are located in close proximity to water bearing zones. For example the Arbuckle dolomite in Kansas is a natural waterdrive reservoir where production is controlled by large void space features like fractures, vugs and/or other ultra-high permeability rock. Traditional frac & acid frac stimulation methods pressure the formation to fracture and will commonly break into the prevalent water bearing zone below, creating detrimental production problems.

The GasGun propellant stimulation tools create multiple radial fractures (like slices in a cake) that penetrate horizontally into the formation on the order of 10’-50’ depending on depth and rock properties. Vertical fracture growth of a GasGun stimulation is restricted to 1’-3’ above and below the tool, giving the operator unprecedented control in the placement of fractures in close water contact applications. The nature of fracture propagation was studied at Sandia National Laboratories (SPE8934) whereby physically mining back the fracture network provided invaluable information about the exact performance of the GasGun and other propellant tools. After learning about the nature of the fractures created by the GasGun, operators quickly learned that they could effectively soak acid in the newly created fracture network with great result. Thus the GasGun can be a great tool for operators stimulating production zones that lie near water bearing formations.

To submit well data for technical review click the link to the left.