http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Semi-analytical methods for the analysis and interpretation of well test data distorted by wellbore storage and skin effects
xvii, 155 leaves : illustrations ; 28 cm.
[ ] The advantage of our approach is that these solutions
Again, for comparison, the results from the numerical
all of the models are as accurate as the Laplace transform
all times of interest. To verify our new P,,CD(tD) models, we
applied new modules for the historymatching program (PERANA).
approximate models by assuming the behavior of dimensionless
approximate solutions exhibited excellent agreement and
are semi-analytical, closed-form solutions. We propose five
attempt to develop and apply real time domain solutions for
because in most cases the analytical derivatives are too
can be used to predict the pressure behavior of a well
compare our new solutions to a number of field data cases.
consistency with the numerical inversion solution (except for
constant rate pressure at the sandface, P,D(tD), as follows:
generally better to compute the pressure derivative functions
graphical comparison of the residuals for each approximate
In order to perform history-matching of our new solutions, as
influenced by wellbore storage and skin effects in the real
influenced by wellbore storage and skin effects. In
inversion solution (as the "exact" solution) and our new
inversion solution are used as the base results. In general,
Model 2). As a practical consideration, we found that it is
numerical inversion solution, though Model I is clearly not
numerically, rather than by analytical differentiation,
Our objective is to develop approximations of the pressure-
particular, we have focused on the cylindrical source
relations as the "approximate" solutions. We also provided a
solution (as compared to the numerical solution). All of the
solution for wellbore pressure behavior that has been
solution. As a comparison, we generated the "type curve"
solutions for a well in an infinite-acting reservoir with
storage and skin effects. Our resulting approximate models
tedious for hand calculations. For practical applications, we
time behavior for use in analyzing the pressure response of a
time domain. To our knowledge, this work is the first
used the numerical inversion solution as the exact
well as the numerical inversion solution we developed and
well in an infinite-acting reservoir influenced by wellbore
wellbore storage and skin effects using the numerical
Issued also on microfiche from Lange Micrographics.
Includes bibliographical references: pages 134-138.