Profile control is one main effective measure to increase oil production and reduce water cut during the later period of oilfield development. The gel particle is a widely used profile control agent, but the research of migration performance in the pore throat is little, which limits its application. Based on the Hertz contact theory, the theoretical model of gel particle transport through pore throat is established combining with the geometrical analysis and material analysis. The model is verified by core experiments and its correctness is certified. The results show that the particle transportation performance is influenced by the material properties and the size matching degree between particle and pore throat. The particle migrates through the pore throat without morphological change only when the pore throat size is larger than the particle size. The particle transportation is blocked and the deformation happens when the pore throat size is smaller than the particle size. The injection pressure improves with the increasing of size ratio between particle and pore throat, and it keeps constant as the limitation of the material property. According to the study, the software is compiled in order to evaluate the transportation performance and to describe the morphologic change of particle profile control agent fast and conveniently.
|Acceptance of Terms and Conditions||Click here to agree|