Deep Profile Control and Flooding Performance of Throat-scale
Elastic Microspheres

doi:10. 3863/j. issn. 1674 – 5086. 2013. 04. 016

Abstract

Abstract:

According to the problems of water flooding and the application status of elastic microspheres profile control and
flooding，the particle size distribution of elastic microspheres was analyzed using laser particle size analyzer；using sandpack
core（single tube sandpack，long sandpack，heterogeneous two-tube sandpacks，heterogeneous three-tube sandpacks）displacement
experiments，the plugging property，migration capacity，diversion property，oil displacing performance and deep profile
control and flooding property after polymer flooding of elastic microspheres were studied. The results show that the particle size
of elastic microspheres bears a typical single-peak distribution character obeying Weibull Distribution；elastic microspheres can
migrate and plug in sandpacks gradually，which indicate that elastic microspheres have deep displacement performance；elastic
microspheres can plug high permeability layer selectively which can be applied to heterogeneous sandpacks，with the enhanced
oil recovery 16.11%（low permeability tube），11.28%（middle permeability tube）and 5.02%（high permeability tube）respectively.
This indicates that elastic microspheres can improve the middle and low permeability oil layers as well as middle and
low permeability areas of high permeability layers selectively and thus enhance oil recovery effectively；elastic microspheres
profile control and flooding after polymer flooding can enhance oil recovery by 5.73%more than single polymer flooding which
indicates that elastic microspheres have better deep profile control and flooding efficiency after polymer flooding.

Key words: pore-scale elastic microspheres, particle size distribution, plugging property, bifurcation flow property, deep
profile control and flooding, enhanced oil recovery

Yao Chuanjin, Li Lei, Lei Guanglun, Gao Xuemei. Deep Profile Control and Flooding Performance of Throat-scale
Elastic Microspheres[J]. 西南石油大学学报(自然科学版), DOI: 10. 3863/j. issn. 1674 – 5086. 2013. 04. 016.

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