doi:10.16186/j.cnki.1673-9787.2020100007

Received:2020/10/08

Revised:2021/02/07

Published:2022/05/15

Effects of different factors on pulse pressure response

JIA Shichuan1, HU Liqiang1, XIAO Zhiyong1, WANG Gang1,2,JIANG Feng1

1.Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation， Shandong University of Science and Technology， Qingdao  266590 ， Shandong， China;2.State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology， Shandong University of Science and Technology， Qingdao  266590 ， Shandong， China

Abstract: In order to study the law of pulse pressure response under different factors, the finite difference method was adopted to solve the one-dimensional transient flow nonlinear partial differential control equation of porous compressible medium. Combined with the finite difference form and initial condition of boundary conditions , the influence of parameters contained in the model on the pressure response was studied in MATLAB environment. The results showed that the time of pressure equilibrium was negatively correlated with the permeability , and with the increase of permeability , the time required for the airflow to reach a stable state decreased ; The pulse pressure would go through two stages in the macropore specimen , the rapid reduction stage and the slow reduction stage ,the pore volume was negatively correlated with the equilibrium pressure ,and the pressure equilibrium time was positively correlated;For the same upstream and downstream reservoir volume,the equilibrium time and equilibrium pressure were positively correlated with reservoir volume,and the time of airflow reaching stable state was negatively correlated with reservoir volume. The study was of theoretical significance for further understanding the permeability of unconventional reservoirs.

Key words:finite difference method;pulse pressure response;permeability;porosity;reservoir volume

不同因素对脉冲压力响应的影响规律研究_贾石川.pdf