Solutions to increase the C-2P well production performance at X oil field, Block 09-2

Abstract

The well C-2P had its first oil production in July 2008, the initial
production rate is 3,000 barrels/day. Due to the reservoir pressure
depletionin2017-2018,the wellfaced difficultiesinkickingoffto openthe
well for production. In November 2018, when the C-5PST2 well was put
into production, the C-2P well was not produced by natural flowing. The
kicking off has been attempted many times but the well still won't flow.
The main reason the well couldn’t flow is due to low reservoir pressure
which has not enough energy to push allthe fluid in the wellto the surface
after each well shutdown. The flow assurance study shows, at the
reservoir pressure of 3,000 Psi, and tubing head pressure of 950 Psi, the
well can’t flow naturally. In addition, with the reservoir pressure of 3,000
psia and applying the gasliftinjection rate of 1.0 MMscf/d, injection point
at 3,030 mTVD, the well flowed. The continuous gaslift pump helps
maintain the well's production in case the reservoir pressure drops even
lower to 2,000 psi, and atthe same time, optimizing the gaslift pump flow
helpsto increase the well production by 100-300 barrels of oil/day. When
the reservoir pressure dropslower, itis necessary to lower the gaslift valve
deeper to continue kicking off the well and maintain the well production
performance. On the other hand, due to the lack of a gaslift valve for the
original design of C-2P wellso it's necessary to have gaslifttubing pack off
in order to bring the well back to production, maintain stability and
improve production. This paper, therefore, presents the results of the
research on the solution to increase the production output oftheC-2Pwell
located in X oil field used gaslift valve combining with the tubing pack off.
Results of the research on the application of solution show that the well's
production output has increased significantly (0.354 million barrels) in
the first year of applying the solution