NDLI: The Spontaneous Imbibition of Micro/Nano Structures in Tight Matrix and the Influence on Imbibition Potential

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The Spontaneous Imbibition of Micro/Nano Structures in Tight Matrix and the Influence on Imbibition Potential

Content Provider	MDPI
Author	Li, Caoxiong Xian, Chenggang Wang, Jun Geng, Dandan Shen, Yinghao
Copyright Year	2020
Description	Tight matrix has relatively low permeability and porosity, with abundant micro/nano pores. The capillary force in these pores are relatively strong, making the wetting liquid easier to be imbibed in the matrix. This process is called spontaneous imbibition. The complexity of pore structure is identified as one of the key factors influencing the imbibition process, but the detailed mechanism is not clear. Thus, in this work, a method is proposed to evaluate the influence of pore structure on imbibition process. Pore structure has fractal properties in a specific scale. By using the fractal theory, an imbibition model is provided to analyze the influence of microscopic structures on spontaneous imbibition, considering the pore size distribution and pore connectivity. Also, based on this model, the influencing factors on dimensionless imbibition and diffusion rate are discussed. Results show that the pore structure has more branches, larger and shorter sub-throats has higher chance to gain a high imbibition rate. Finally, a 3D imbibition parameter cube is constructed to determine the parameter combinations in favor of strong water diffusion potential. By utilizing the analysis method based on the fractal theory, we can effectively evaluate the imbibition potential. It is helpful to provide a guidance to evaluate the water imbibition to gas production.
Starting Page	794
e-ISSN	2072666X
DOI	10.3390/mi11090794
Journal	Micromachines
Issue Number	9
Volume Number	11
Language	English
Publisher	MDPI
Publisher Date	2020-08-21
Access Restriction	Open
Subject Keyword	Micromachines Petroleum Engineering Tight Matrix Water Imbibition Pore Structure Fractal Theory
Content Type	Text
Resource Type	Article

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