American Oil and Gas Reporter - April 2015 - 116

SpecialReport: Offshore Tech Trends
FIGURE 3
Three-Well Scenario NPV Results
18%
16%
14%
12%
10%
8%
6%
4%
2%
0%
6 mw MPP

3 mw MPP

2 x 3 mw MPP

High PI (3 bbl/d/psi)

mud-line boosting pumps.
For the high-PI case, the six-mw
pump's NPV was again highest, followed
closely by the two three-mw MPPs operating in parallel. Three wells in the field
development model exhibiting high-PI
required the maximum power output of
the mud-line pumps and ESPs throughout
the field's life. The single three-mw MPP
operated at maximum power for the twowell, high-PI case from early to midlife
of the field, but was underpowered in
supporting three high-PI wells over the
field's entire life.
From an ROI perspective, the mudline boosting pumps exhibited the best
performance of the secondary recovery

JAMIE
HARTLEY

Jamie Hartley is engineering manager for FMC Technologies' subsea
processing global services group. He
has more than 20 years of experience
in the upstream oil and gas industry,
and has held various positions in R&D,
subsea engineering and project management throughout his career. Hartley
graduated from Georgia Institute of
Technology with a bachelors in mechanical engineering, and is a registered
petroleum engineering.

ESP

ESP + 3 mw
SPP

Low PI (1.5 bbl/d/psi)

configurations evaluated (Figure 4). The
mud-line pumps showed 160-230 percent
ROI improvements for the three low-PI
well scenarios versus two low-PI wells in
large part because the pumps had excess
capacity when paired with only two lowPI wells. The ROI for the ESP configurations
stayed the same for the ESP-only configuration, and improved 70 percent for the
configuration that included a three-mw
SPP.
Given the power capacity constraints
on all configurations, it would appear
that the power capacity limit was reached
in terms of reservoir depth for ESPs and
the limit on the number of wells that
could be supported by mud-line pumps.

ERIC
SMEDSTAD

Eric Smedstad is global services manager for subsea processing at FMC Technologies, responsible for supporting all
subsea processing projects. Before joining
FMC, he spent 15 years with Schlumberger
in a variety of operations, product development and business development assignments. Smedstad holds nine subsea
technology patents related to communications, power distribution and well intervention. He has a B.S. in marine engineering from Texas A&M University.

116 THE AMERICAN OIL & GAS REPORTER

Combined Lift Methods
As demonstrated, a small change in
only one variable (i.e., PI) can result in
significant changes to ROI. There are
numerous variables that can impact the
performance of any one of the secondary
recovery solutions evaluated. While there
are many differences in the properties of
Paleogene wells, this analysis provided
insights into the relative performance
characteristics of each secondary recovery
method.
The combination of artificial lift in
the form of ESPs coupled with mud-line
boosting pumps has the potential to
provide the greatest amount of recovery.
However, the economics associated with
this configuration over the life of a field
do not provide a compelling justification
for this secondary recovery option. The
high costs associated with the intervention
operations and shorter ESP run life negate
the recovery gains.
The analysis shows that utilizing mudline pumps is a more cost-effective field
development solution. The pumps provide
longer run life, which equates to much
fewer intervention operations over a
field's life. Moreover, mud-line pump
interventions can be performed by lower-cost vessels in a much more expedient
manner, resulting in less deferred production, greater uptime and much lower
OPEX.
The subsea pump market is currently

ERVINA
WIDJAJA

Ervina Widjaja is a subsea process
engineer at FMC Technologies. She has
eight years of experience in the oil and
gas industry. Widjaja's work focuses
on the production modeling and flow
assurance of the subsea processing system. She holds a B.S. and Ph.D. in
chemical engineering from Purdue University.



American Oil and Gas Reporter - April 2015

Table of Contents for the Digital Edition of American Oil and Gas Reporter - April 2015

Contents
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