Atıf İçin Kopyala
Durgut İ.
Selçuk Üniversitesi Mühendislik, Bilim ve Teknoloji Dergisi, cilt.7, sa.1, ss.331-345, 2019 (Hakemli Dergi)
Özet
- Pressure surge in a pipe due to sudden flow rate change or full-stop of
fluid flow is a pressure wave propagating in fluid along the pipe. This
phenomenon has been used to determine the flow rate and to detect and
monitor changes in effective flow diameter. It turns out that the
pressure surge, also known as pressure pulse, can be used to estimate
the formation transmissivity and storativity in the near wellbore
region. In this study, propagation of pressure pulse generated by sudden
valve closure is simulated with a transient pipe flow model, and it is
coupled with a transient analytical reservoir model. The coupled model
is used to estimate the reservoir parameters by history matching
approach, which is to iterate the transmissivity and the storativity
values until an acceptable match is obtained between the measured and
simulated pressure history at the upstream of valve. The developed
modeling and estimation scheme is applied with two data sets from a
field well test to estimate reservoir parameters. The reservoir
parameters transmissivity and storativity in the near wellbore region
were obtained from the history matching analysis. Matching analysis with
the coupled model on the recorded wellhead pressure during two tests
showing obvious different flowing conditions points out very similar
reservoir parameter values.