1. technology and computing

Expro’s CaTS™ Wireless Communications
Technology: Adding value throughout the well
lifecycle: reducing reservoir uncertainty, optimising
production and enhancing well integrity.
Roger Hunt, Wireless Well Solutions
OTC Houston
May 2015
Introduction to Expro
Global market leader in well flow management
Market leading global provider of highly specialised well flow management services to
the oil and gas industry.
Specific focus on offshore, deep water and other technically challenging environments
with high barriers to entry.
Offer a range of mission critical services designed to measure, improve, control and
process flow from high value oil and gas wells:
•
Well test and appraisal
•
Subsea, completion and intervention services
•
Production services
•
Capabilities span the full life cycle of oil and gas field from exploration to
abandonment
Our vision is to be the market leader in well flow management, using the industry’s best
people, to deliver the highest standards of safety, quality and personalised customer
service.
©Copyright Expro 2015
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Presentation outline
• CaTS™ technology overview
• Surface read-out for DST
• Advanced Reservoir Testing (ART)
• Well integrity
©Copyright Expro 2015
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CaTS technology overview
•
Wireline, coiled tubing, or completion
conveyed
•
Setting options include:
• nipple profile
• below a bridge plug, or
• clamped externally to well tubulars
•
Pressure / temperature data is encoded
and transmitted up the completion via an
Electromagnetic (EM) signal
•
Signal is collected at surface using a
topside receiver, decoded and stored
locally, or transmitted onwards
©Copyright Expro 2015
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CaTS benefits
•
CaTS is not affected by cement or bridge plugs
• ideal where a well or zone is to be permanently abandoned
•
No requirement for a cabled connection to the downhole system
• means no requirement for feed-throughs or penetrations of the bridge
plugs, packers, tubing hanger or xmas tree
Being an electrical signal, the signal pick-up can be located anywhere on the
wellhead structure
•
•
Standard intervention equipment and procedures are used to deploy and
retrieve the CaTS technology
•
CaTS technology does not require a tubing or completion string in the well
• data can be transmitted through the casing or liner
©Copyright Expro 2015
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CaTS features
•
The CaTS technology can be retrofitted into an existing well.
•
The CaTS EM telemetry is addressable therefore enabling multiple CaTS
installations into a single well for multi-zone monitoring
•
The CaTS technology is through-tubing retrievable and can be redressed /
batteries replaced for re-installation (if required)
•
By using a CaTS relay station(s) there is no limit to the achievable
transmission range
©Copyright Expro 2015
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• Technology overview
• Surface read-out for DST
• Advanced Reservoir Testing (ART)
• Well integrity
©Copyright Expro 2015
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CaTS surface read-out for DST
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15K psi / 150oC rated
•
30s – 2mins SRO updates (subject to well
conditions and repeater configuration)
Repeater station
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7 to 21 days battery life
•
1s data logging to internal memory
•
1.8M data point internal memory
•
Relay stations every 2,000ft (on average
subject to well conditions) – max 7 relay
stations per system
Sensor station
•
Dual system redundancy throughout
•
Above packer / below tester valve or below
packer location
©Copyright Expro 2015
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CaTS surface read-out for DST
EXchange™
1. Deploy DST string
3. Perforate
•Pressure
2. Set packer
4. Perform dynamic well test
5. Shut in well
•Time
6. Capture pressure build-ups
7. Capture historical data
8. Terminate test
9. Pull DST string
©Copyright Expro 2015
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CaTS surface read-out for DST
Extract II™
1. Deploy DST string
3. Perforate
•Pressure
2. Set packer
4. Perform initial flow tests
5. Shut in well
•Time
6. Deploy CaTS Active Pick-Up
7. Capture pressure build-up
8. Capture historical data
9. Terminate test
10. Retrieve Active Pick-Up
11. Pull DST string
©Copyright Expro 2015
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• Technology overview
• Surface read-out for DST
• Advanced Reservoir Testing (ART)
• Well integrity
©Copyright Expro 2015
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CaTS™ Advanced Reservoir Testing (ART)
©Copyright Expro 2015
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CaTS™ Advanced Reservoir Testing (ART)
wireless communications
Advanced Reservoir Testing:
a case history
©Copyright Expro 2015
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Clair Field and 206/8-13y (T) well location
(Ref. SPE 108435)
Structure map at
top reservoir
T well with
CaTS gauge
Clair Ridge
m
8k
Phase 1 Area
©Copyright Expro 2015
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Wireless reservoir monitoring of permanently
abandoned subsea appraisal wells (Ref. SPE 108435)
•
4
13Z MDT pressure corrected to 13Y DST datum
6
XX50
13Y MDT pressure corrected to DST datum
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13Y DST P initial pressure
Pressure (psia)
XX40
A04 WI came on line
A08Z WI came on line
10
XX30
12
14
XX20
16
CaTS pressure corrected to 13Y DST datum
XX10
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206/8-13Y bottom hole pressure
Cum Voidage Clair A
XX00
Feb-06
Cumulative Voidage deficit at Clair A (million bbls)
XX60
20
Apr-06
Jun-06
Aug-06
Oct-06
Dec-06
Feb-07
Apr-07
Jun-07
Aug-07
©Copyright Expro 2015
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The value of ART on the Clair Ridge appraisal
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18 months of high quality reservoir data recovered at low incremental
well cost
•
The correlation of the reservoir pressure responses and trends between the
Clair Phase1 platform and the Clair Ridge appraisal well provided clear
evidence of reservoir connectivity
•
Cost effective ART in an abandoned subsea appraisal well provided high
value data to steer the future development planning on Clair
©Copyright Expro 2015
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• Technology overview
• Surface read-out for DST
• Advanced Reservoir Testing (ART)
• Well integrity
©Copyright Expro 2015
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Well integrity
Pressure barriers and verification requirements
Norsok guidelines:
“There should be two well barriers available during all well activities and
operations, including suspended or abandoned wells where pressure differential
exists that may cause uncontrolled outflow from the borehole / well to the
external environment”
..........also states that for initial verification:
“When the well barrier has been constructed, its integrity and function shall be
verified by means of leak testing by the application of differential pressure” or to
perform “verification by other specified methods”
©Copyright Expro 2015
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Well integrity
Verification challenges of double barriers
•
The sealing integrity of the deepest barrier can be verified by the
application of a differential pressure from surface and using surface
pressure sensing equipment
•
Due to the relatively small volume of fluid trapped between the upper and
lower plugs, compared with the large volume of fluid above the plug, the
application of pressure from surface, when used with surface pressure
monitoring equipment, will not be able to verify the sealing integrity of the
upper plug
•
CCL used to deploy the upper plug as a signal pick-up, a solution was
identified that allowed the pressure from below the upper plug to be
transmitted to surface in real time when the differential pressure test from
surface was being applied
©Copyright Expro 2015
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Well integrity
CaTS below plug barrier verification technology
1. Deploy deep set plug
3. Pressure test deep set plug
•Pressure
2. Set plug
4. Deploy shallow set plug
5. Set plug
•Time
6. Perform leak-off test
7. Capture surface read-out data
8. Terminate test
9. Retrieve wireline toolstring
©Copyright Expro 2015
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Well integrity
Results – well no. 1
•
Plugs
©Copyright Expro 2015
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Well integrity
Results – well no. 3
•Bleed-off tubing
pressure
•Pressure up well
(tubing & annulus)
•Set plug
•After bleeding off
annulus pressure
©Copyright Expro 2015
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Well integrity
The value of barrier integrity testing
•
By running a CaTS gauge below the upper bridge plug in a dual barrier
sealing configuration it has been possible to verify, in real time, the sealing
integrity of the upper barrier placed in the well
•
Requiring only a single run in hole to set and verify the plug resulted in a
cost effective and operationally efficient abandonment campaign
•
No penetrations meaning no compromise to the integrity of the well or
barriers
•
Compatibility with any third party plug supplier provides for flexibility in
vendor selection
©Copyright Expro 2015
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Thank you:
any questions?
Brian Champion
Roger Hunt
Global Sales Director
Wireless Well Solutions
Sales Manager
Wireless Well Solutions
Brian.champion@exprogroup.com
Roger.hunt@exprogroup.com
Tel: +44 1202 812404
Tel: +44 1202 812406
©Copyright Expro 2015
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