Journal of Southwest Petroleum University(Science & Technology Edition) ›› 2022, Vol. 44 ›› Issue (5): 61-73.DOI: 10.11885/j.issn.1674-5086.2020.05.25.01

• OIL AND GAS ENGINEERING • Previous Articles     Next Articles

Methods of Time Scaling-up for Spontaneous Imbibition

WEI Bing1, LI Qinzhi1, LIU Chenggang2   

  1. 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
    2. Chuanqing Drilling Engineering Company Limited, CNPC, Chengdu, Sichuan 610000, China
  • Received:2020-05-25 Published:2022-10-28

Abstract: In this paper, the progress of the time scaling-up methods for spontaneous imbibition (SI) processes in recent years is comprehensively reviewed. Based on the mechanism of SI, the modified and expanded models are analyzed. In addition, based on the core-scale theoretical and empirical models, the applicability and existing problems of these models in field-scale application are discussed. Representative dimensionless models and the corresponding boundary conditions are summarized. Firstly, the dominant contributing mechanisms of SI are capillary pressure and gravity, and the SI process is governed by both of these two mechanism for majority of tight reservoirs. Secondly, there exists wide gap between core-scale and field-scale studies for tight reservoirs, which thus makes the results irrelevant and mis-predicted. Therefore, to establish the time scaling-up models for SI with different media in tight reservoirs based on the modified scale analytical models with different mechanisms, are extremely important for predicting the dynamics of enhanced oil recovery in tight reservoirs.

Key words: spontaneous imbibition, time normalization, tight reservoirs, control mechanisms, dimensionless model

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