TITLE:
Research on Well Testing Interpretation of Low Permeability Deformed Dual Medium Reservoir
AUTHORS:
Meinan Wang, Yue Xie, Rui Zhang, Guohao Zhang, Jianguo Liu
KEYWORDS:
Low Permeability Oil Reservoirs, Deformation Medium, Dual Media, Cross Flow Coefficient, Well Testing Interpretation Model
JOURNAL NAME:
Open Journal of Applied Sciences,
Vol.13 No.11,
November
29,
2023
ABSTRACT: Considering the influence of quadratic gradient term and medium deformation
on the seepage equation, a well testing interpretation model for low permeability
and deformation dual medium reservoirs was derived and established. The difference
method was used to solve the problem, and pressure and pressure derivative double
logarithmic curves were drawn to analyze the seepage law. The research results indicate
that the influence of starting pressure gradient and medium deformation on the pressure
characteristic curve is mainly manifested in the middle and late stages. The larger
the value, the more obvious the upward warping of the pressure and pressure derivative
curve; the parameter characterizing the dual medium is the crossflow coefficient.
The channeling coefficient determines the time and location of the appearance of
the “concave”. The smaller the value, the later the appearance of the “concave”,
and the more to the right of the “concave”.