Natural-Gas Storage Services

Real Results
We have supported natural-gas storage operations in
countries throughout the world. Following are a few
summaries of recent operations:
Matzen and Schöenkirchen Fields, Austria
Completion Package Enhances Injection and Production
Rates in Central European Gas Storage Wells
Weatherford supplied completion equipment and support
services to OMV on an operation in the Matzen and
Schöenkirchen fields. Specifically, the project entailed
openhole gravel-packing and completion of four newly drilled
wells and re-entry of three old existing wells. Completed in
just two months, the successful operation helped the client
achieve higher injection and production rates, improve well
and pump design, and enhance storage capacity through
better reservoir contact.
Southern California, USA
ESS ® Technology Enables Client to Achieve High Rate of
Sand-Free Production on Multi-Well Gas Storage Project
Izaute Field, Southwestern France
Our innovative ESS expandable sand screen
enabled a client to cycle injected gas and
withdraw at higher rates than conventional
sand-control techniques permit. The ESS
system also eliminated the need to use more
complex openhole gravel packs.
Clarion
Weatherford’s Clarion multi-station, multicomponent
optical, in-well sensing system
was installed in the Izaute gas storage field
in southwestern France in 2002. Since then
the system has enhanced the operator’s
understanding of the reservoir by acquiring
time-lapsed vertical-seismic-profiling (VSP)
imaging of the gas-water contact.
Optical System Enables Long-Term Monitoring of Gas
Storage Field, Enhances Reservoir Understanding
Weatherford provides worldwide service and support from more than
800 facilities in approximately 100 countries. To learn more about our
natural-gas storage capabilities, contact an authorized Weatherford
representative, or visit weatherford.com
weatherford.com
Weatherford products and services are subject to the Company’s standard
terms and conditions, available on request or at weatherford.com. For
more information contact an authorized Weatherford representative.
Unless noted otherwise, trademarks and service marks herein are the
property of Weatherford. Specifications are subject to change without
notice. Weatherford sells its products and services in accordance with
the terms and conditions set forth in the applicable contract between
Weatherford and the client.
© 2009-2010 Weatherford. All rights reserved. 7238.01
Drilling
Evaluation
Completion
Production
Intervention
Natural-Gas
Storage Services
Drawing on an extensive product portfolio
and oilfield services expertise to optimize
natural-gas storage.

Our Natural-Gas Storage Capabilities
Drilling hazard mitigation
Secure Drilling SM services. Our
Secure Drilling services—including
air drilling, managed pressure
drilling (MPD) and underbalanced
drilling (UBD)—present an
alternative to conventional drilling
when nonproductive time, formation
damage and drilling hazards are
of particular concern. In depletedformation
gas storage wells,
Secure Drilling techniques can be
used to mitigate lost circulation and
to help minimize formation damage.
Drilling
Drilling-with-casing/drilling-with-liner systems.
Our DwC and DwL systems remove the need to trip
drillstring and the bottomhole assembly and allow operators
to case or line a well while
drilling, enhancing safety and
efficiency. Designed expressly
for drilling through trouble
zones, Weatherford DwC and
DwL systems are ideally suited
to mitigate the challenges of
drilling in depleted formations.
Solid expandable systems. Our MetalSkin ® solid
expandable systems expand in situ, thereby minimizing
well telescoping. Their key benefits include slimmer tophole
sections, which reduce costs and surface footprint,
and minimized risk of failing to reach total depth, both of
which contribute to an expanded range of economically
drillable wells. Weatherford MetalSkin systems also offer
a cost-effective
means of
isolating trouble
zones in gas
storage wells
in depleted
formations.
Mitigating lost circulation
Minimizing formation damage
Isolating trouble zones
Ensuring well longevity
Wellhead systems
Our wellhead systems encompass
more than seven decades of
experience. We offer a broad selection
of wellhead systems, components and
complementary services.
Aluminum alloy tubulars
Elastomer products
Contract drilling rigs
We offer a wide selection of rigs and
extensive drilling expertise. In addition
to helping you select an appropriate
rig for drilling and completing gas
storage wells, our integrated drilling
specialists can offer guidance on
our wide array of drilling and
well-construction services.
Heavy-duty
Light-duty
Medium-duty
Well construction
Cementing products. A good cement job
is essential to the longevity of gas storage
wells, which typically have projected life
spans of 25 to 30 years. Backed by a track
record that extends across more than
five decades, Weatherford is one of the
oil and gas industry’s leading suppliers of
cementing products.
Inflatable packers. Acting as high-pressure
seals, our inflatable packers enable zonal
isolation, essential to cementing and other
completion and intervention procedures. Gasstorage-related
applications include isolating
lost-circulation zones in depleted formations.
Drilling tools. We offer tools for virtually any drilling,
completion or workover task. Our vast portfolio encompasses
rotating control devices that can help mitigate drilling hazards
in depleted reservoirs, as well as blowout preventers, including
large-bore units appropriate for gas storage wells in salt
caverns. We can also provide support personnel.
Tubular running services. The long, complex well
trajectories often required on gas storage wells in
depleted reservoirs can increase the risk, rig time
and associated costs of an operation. To help mitigate
these challenges, we offer an extensive portfolio
of innovative equipment, including the TorkDrive
Compact tool, designed to maximize the safety and
efficiency of tubular running in gas storage operations.
Cementing services
Drilling fluids
Liner systems
Mechanized rig systems
Evaluation
Building reservoir understanding
Effective natural-gas storage addresses both environmental and energy supply concerns. One of the world’s largest oilfield service companies, Weatherford has a product and service
portfolio that spans the life cycle of a well—drilling, evaluation, completion, production and intervention. Coupled with our ProjectONE management capabilities, many of our offerings are
ideally suited for new-drill wells and producer-to-injector conversion wells in depleted oil and gas reservoirs and for wells in salt-cavern storage developments.
Wireline services
We offer multiple openhole services—nuclear, resistivity,
magnetic resonance, acoustic and wellbore imaging—to
broaden your understanding of the gas storage reservoir. Our
cased-hole services help ensure well integrity and acquire
data to inform gas-storage-reservoir management. Both our
openhole and cased-hole services are backed by an array of
novel conveyance options, which enable data acquisition in
even the most challenging environments. Our geoscience
expertise rounds out this
offering to assist your gas
storage project feasibility
and design studies.
Cased-hole
Microseismic services
Openhole
Subsurface evaluation services
Completion
Integrated laboratory services
Drilling services
Staffed with highly experienced
geoscience professionals, Weatherford
Laboratories has 38 locations worldwide.
Among the advanced evaluation services
we offer, core analysis can be used for
evaluating a depleted reservoir’s gas
injection and production characteristics
and for selecting an appropriate sandcontrol
method.
We provide advanced equipment designed to facilitate
directional drilling, including record-setting measurementwhile-drilling
(MWD) and logging-while-drilling (LWD) systems;
rotary-steerable systems; and high-performance drilling
motors. Our portfolio includes the EMpulse MWD system, a
critical Secure Drilling enabler; among other applications, it
facilitates air drilling, pertinent to drilling gas storage wells in
depleted formations.
Directional & performance drilling
LWD
MWD
Rotary-steerable systems
Controlling excessive sand production
Accommodating large boreholes
Cased-hole completions
Production
Our comprehensive cased-hole completions portfolio
includes equipment sized for use in salt-cavern gas storage
wells, such as large-bore packers. To ensure life-of-well
casing integrity, we also offer premium equipment designed
to endure the particularly corrosive conditions in salt
caverns; furthermore, we can weld casing. In addition, we
advise on strategies to accommodate the extra stress that
the cyclical nature of gas storage projects, in both depleted
reservoirs and salt caverns, places on equipment.
Downhole control valves
Flow control
Hydraulic flow control
Packer systems
Safety systems
Surface logging systems
With more than 1,500 specialists and a suite of innovative
monitoring hardware, Weatherford is one of the world’s
largest and fastest-growing providers of surface logging
services, used primarily to evaluate formations and optimize
drilling. In addition to enhancing reservoir understanding,
gas-storage-related applications of surface logging include
optimizing mud weights on Secure Drilling operations.
Data management
Drilling optimization
Formation evaluation
Geomechanics services
Testing & production services
Enabling long-term reservoir monitoring
Optimizing injection and withdrawal rates
Detecting leaks
Production optimization
Reservoir monitoring. Reservoir monitoring plays a
critical role in production optimization. Applications
specific to gas storage wells include determining
gas-water contacts; ensuring safe storage; measuring
production volume; and obtaining real-time temperature
profiles, key to determining optimal storage conditions
and to detecting well leaks. Our portfolio includes
multiple optical sensing systems: distributed
temperature, flow measurement, pressure/temperature
and seismic. These highly reliable systems are designed
to endure years of continuous service, rendering them
well suited for gas storage developments.
Artificial lift
Control systems
Flow measurement
Software
Subsea production
Intervention
Sand control
Excessive sand production contributes to equipment
failure and impedes production. In gas storage wells, it
can inhibit injection and withdrawal rates. We offer a broad
selection of sand-control methods, including Weatherford’s
innovative ESS ® expandable sand screen systems, which
can reduce costs and improve productivity relative to more
conventional approaches; gravel packs; and SandAid sand conglomeration service, a patented, chemical sandcontrol
method.
Conventional well screen
Expandable sand control
Gravel pack
Inflow control
Reservoir isolation
Specialty screens
Maximizing intervention efficiency
Multilaterals
Multilateral wells can enhance the
efficiency and reduce the cost of
gas storage operations in depleted
reservoirs. We draw on innovative
equipment, a global team of fishing
and milling specialists, and extensive
well-intervention experience
to optimize your multilateral
installations. Weatherford has
completed more than 10,000 casing
exits (Levels 1 through 4) and 400
multilateral systems worldwide.
MillThru system
OneTrip StarBurst system
Selective re-entry system
StarBurst system
Casing exits
Fishing Services
Thru-Tubing
Well abandonment services
Well servicing
Artificial-lift systems
Pump & fluid systems
Reservoir stimulation
& pressure pumping services
Pipeline & specialty services
Surface production equipment
Industrial products
Engineered Chemistry ®
© 2009-2010 Weatherford. All rights reserved.