Fluid Blockage and Diversion

Quoc P. Nguyen

Fluid blocking and/or diversion techniques have been found essential in most of the near-well bore treatments, such as acid diversion, water conning (high WOR), gas cusping (high GOR), and hydraulic fracturing.

 A dispersed system such as foam and polyaprheons has been used worldwide as blocking/diverting agents. The main objective of this project is to improve the conformance of such a fluid system by controlling its complex rheology in porous media. One of important findings from this project shows that viscous fingering appears to be a prevailing flow regime during the displacement of a viscous blocking/diverting agent. This flow behavior has a strong implication on the development of wormholing during matrix acidizing.