Fluid blockage occurs in natural gas wells in the near wellbore region.  This fluid blockage could be aqueous-based from a high connate water level or aqueous based intervention (chemical treatment or waterflooding) and/or hydrocarbon liquid in the form of a retrograde condensate or volatile oil. The retrograde condensate or volatile oil is present due to an isothermal reduction in reservoir pressure.  The greatest reduction in pressure occurs in the near wellbore region and across the face of a fracture.  Materials have been developed to alter the wettability of the matrix and/or the wettability of the proppant in a fracture and thus increase the relative permeabilities of phases that come into contact with the treated area.  This results in an increase in production over a longer period of time than is realized by more temporary solutions such as gas injection to increase the pressure, solvents to clean up the blockage or fracturing.  A summary of field trial data for these products will be presented.<br/>

Wettability modification to enhance productivity in natural gas wells

256th National Meeting (2018)

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