Baker Hughes Drilling Services Determined Reservoir Quality for

CASE HISTORY
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Baker Hughes Drilling Services Determined Reservoir Quality
for Deepwater Operator
Location: Malaysia
A deepwater operator in Malaysia planned
to drill a well in a sand reservoir and needed
to minimize the risk of reduced recovery due
to potential fault compartmentalization. The
plan was to get as close as possible to the
target reservoir’s base without penetrating the
nonproductive mass-transport deposit (MTD)
underneath.
To minimize penetration of the nonproductive
MTD at the heel of the well, the target depth
for the horizontal section was adjusted
based on formation information gathered using
a number of Baker Hughes logging-whiledrilling (LWD) services.
To drill the well, Baker Hughes deployed a
6¾-in. bottomhole assembly (BHA) that
included its AutoTrak™ G3 rotary steerable
drilling system (RSS). With the AutoTrak G3 RSS,
the LWD sensors are placed directly above the
steering unit, enabling the delivery of accurate,
near-bit measurements. This is combined with a
reliable, precise steering response that ensures
better borehole quality.
Results
nnAvoided
underlying MTD
nnDeployed
The LWD services Baker Hughes provided
included the LithoTrak™ advanced LWD porosity
service, which delivered precise neutron
porosity and formation density logs at rapid
sampling rates, and the TesTrak™ formation
pressure-while-drilling service, which helped
determine reservoir quality, fluid type, and the
effectiveness of nearby well water injection
support for the reservoir.
In addition, the Baker Hughes AziTrak deep
azimuthal resistivity LWD system was used
to help the operator visualize location,
formation structure, and navigational headings
in real time. This project marked the first
deployment of the AziTrak system in Malaysia,
and the first time the system was used to
avoid an MTD.
™
first AziTrak service
in Malaysia
Challenges
nnProduction
nnTurbitide
well
formation
nnDepth
uncertainty and uncertainty
in local dip variations
Baker Hughes solution
nnAutoTrak
nnAziTrak
G3 RSS
LWD system
nnLithoTrak
LWD service
nnReservoir
Navigation Services
nnTesTrak
service
A
B
C
These plots show where the well trajectory intersected overlying formations and landed in the target reservoir (A), the MD of 492 ft (B), and the distance-to-bed boundary with
the centered well’s trajectory (C).
CASE HISTORY
The LWD data gathered was used to support
the Baker Hughes Reservoir Navigation
Services (RNS) in detecting the top of the
underlying MTD. RNS detected the distance to
the bed boundary with centered well-trajectory
detection, which was sensitive to nearby
conductive boundaries between the reservoir’s
sands and the MTD shales. The top of the
underlying MTD was first detected
2.0 m (6.6 ft) below the well trajectory.
The operator decided not to drill closer
than 1.4 m (4.6 ft) to the base of the target
reservoir before navigating away from it. RNS
helped achieve a total production length of
150 m (492 ft) in the target reservoir.
This well is now a successful producer, and
confidence in the services provided has
resulted in additional use of Baker Hughes
services on future wells for this operator.
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© 2015 Baker Hughes Incorporated. All rights reserved. 42364 02/2015