Experimental Study on the Mechanical Response and Seepage Characteristics of Low-Permeability Reservoirs under Pressure-Driven Water Injection Conditions

Mengqi Wang

doi:10.62051/ajmse.v1n2.19

Authors

Mengqi Wang College of Petroleum Engineering, Xi’an Shiyou University, Xi’an, Shaanxi, 710000, China

DOI:

https://doi.org/10.62051/ajmse.v1n2.19

Keywords:

Low-permeability Reservoir, Pressure-driven Water Injection, Rock Mechanics, Imbibition

Abstract

To address the issues of insufficient injection capacity and slow energy replenishment associated with conventional waterflooding development in low-permeability oil reservoirs, this study takes typical low-permeability core samples from the X block in the eastern Yin'e Basin as the research subject. A systematic series of experiments on rock mechanics, single-phase and two-phase seepage, and imbibition is carried out to reveal the mechanical response of the reservoir, the evolution of seepage capacity, and the redistribution characteristics of residual oil under pressure-driven water injection conditions. The results indicate that pressure-driven water injection can significantly improve pore-throat connectivity and flow pathways, thereby enhancing the co-permeability of oil and water phases. In addition, imbibition oil displacement facilitates further mobilization of residual oil in medium and large pores.

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