Preprint Article Version 1 This version is not peer-reviewed

Modeling Efficiency of Energized Fluid Fracturing in Tight Gas Formations

Version 1 : Received: 26 April 2019 / Approved: 28 April 2019 / Online: 28 April 2019 (10:39:53 CEST)

How to cite: Wilk, K. Modeling Efficiency of Energized Fluid Fracturing in Tight Gas Formations . Preprints 2019, 2019040310 (doi: 10.20944/preprints201904.0310.v1). Wilk, K. Modeling Efficiency of Energized Fluid Fracturing in Tight Gas Formations . Preprints 2019, 2019040310 (doi: 10.20944/preprints201904.0310.v1).

Abstract

Hydraulic fracturing is the most effective method of stimulation for hydrocarbon reservoirs. However the use of water-based fracturing fluids, can be a problem in water-sensitive formations due to the permeability damage hazard caused by clay minerals swelling. For this reason, the foamed fracturing fluids with addition of natural, fast hydrating guar gum were examined. The rheology and filtration coefficients of foamed fracturing fluids were examined and compared to the properties of conventional water-based fracturing fluid. Laboratory results provided the input for numerical simulation of the fractures geometry for water-based fracturing fluids and 50% N2 foamed fluids. The results show, that the foamed fluids were able to create shorter and thinner fractures compared to the fractures induced by the non-foamed fluid. The simulation proved that the concentration of proppant in the fracture and its conductivity are similar or slightly higher when using the foamed fluid. Moreover such fluids are able to significantly reduce the amount of water necessary for fracturing treatments, limiting clay minerals swelling, and reducing the reservoir permeability damage. The foamed fluids, when injected to the reservoir, provide additional energy, that allow for more effective flowback, and maintain the proper fracture geometry and proppant placing. The results of laboratory work in combination with the 3D simulation showed, that the foamed fluids have suitable viscosity which allows opening the fracture, and transport the proppant into the fracture, providing successful fracturing operation.

Subject Areas

hydraulic fracturing; energized fracturing fluid; tight gas; reservoir stimulation; frac fluid rheology

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