A new form of horizontal well completion
technology is the main objective of this research. This
paper presents a mathematical model to evaluate the
performance of a horizontal well during infinite-acting
flow period with tapered completion strategy.
The dimensionless pressure solution for a
horizontal well exhibiting infinite acting flow was used
to compute total wells pressure drop per unit rate
function as a single tubing component and then tapered
tubing component. Three cases were on spotlight which
are single completions, two step tapered completions
and three step tapered completions to appositely
evaluate their comparative performance. Sensitivity
analysis was carried out by investigating the influences
of wellbore properties assuming a homogenous
reservoir that produces a single-phase fluid at a
The results show that the tapered horizontal well
outperforms that of the conventional on the basis of
total pressure drop per unit flow rate per completion.
The longer the length of the tapered horizontal well
sequentially with corresponding increase in wellbore
radii, the lower the pressure drop per unit flow rate
obtained and also longer time to end infinite-activity.
The maximum well length for any completion strategy
is dictated chiefly by wellbore skin and reservoir
An excellent performance is achieved when the
horizontal well is tapered yielding even much more by
varying the parameters of length and radii. It is
therefore evident that tapered horizontal well
completions presents a lot more capabilities in
extending the period of oil production in spite of
reservoir size and nature of external boundaries.
Keywords : Infinite-Acting, Horizontal Well, Performance, Tapered, Completion Efficiency.