The bubble point
pressure (
P
b
) is a
crucial pressure–volume–temperature (PVT) property and
a primary input needed for performing many petroleum engineering calculations,
such as reservoir simulation. The industrial practice of determining
P
b
is by direct measurement from PVT tests or
prediction using empirical correlations. The main problems encountered
with the published empirical correlations are their lack of accuracy
and the noncomprehensive data set used to develop the model. In addition,
most of the published correlations have not proven the relationships
between the inputs and outputs as part of the validation process (i.e.,
no trend analysis was conducted). Nowadays, deep learning techniques
such as long short-term memory (LSTM) networks have begun to replace
the empirical correlations as they generate high accuracy. This study,
therefore, presents a robust LSTM-based model for predicting
P
b
using a global data set of 760 collected data
points from different fields worldwide to build the model. The developed
model was then validated by applying trend analysis to ensure that
the model follows the correct relationships between the inputs and
outputs and performing statistical analysis after comparing the most
published correlations. The robustness and accuracy of the model have
been verified by performing various statistical analyses and using
additional data that was not part of the data set used to develop
the model. The trend analysis results have proven that the proposed
LSTM-based model follows the correct relationships, indicating the
model’s reliability. Furthermore, the statistical analysis
results have shown that the lowest average absolute percent relative
error (AAPRE) is 8.422% and the highest correlation coefficient is
0.99. These values are much better than those given by the most accurate
models in the literature.