Development of a 1,000 Level 3C Fiber Optic Borehole ... · •Goals: Design, build, and test a...

Development of a 1,000 Level 3C

Fiber Optic Borehole Seismic Receiver

Array Applied to Carbon Sequestration

DE-FE0004522

Björn N.P. Paulsson

Paulsson, Inc.

U.S. Department of Energy

National Energy Technology Laboratory

Carbon Storage R&D Project Review Meeting

Developing the Technologies and Building the

Infrastructure for CO2 Storage

August 21-23, 2012

• Goals: Design, build, and test a high performance

borehole seismic receiver system to allow cost

effective geologic Carbon Capture and Storage (CCS)

• Objectives: A: Develop technology to allow

deployment of a 1,000 level drill pipe deployed 3C

Fiber Optic Geophone (FOG) receiver array for deep

boreholes. B: Build a 150 level 3C 15,000 ft long

prototype system. Test the prototype system, and

conduct a borehole seismic survey at a Carbon

Capture and Storage site with the fiber optic borehole

seismic prototype system

Project Overview: Goals and Objectives

Long array => large

direct arrival angle range

Seismic Imaging

26,000 ft TD

3,000 ft

23,000 ft

Shot 3,000 ft

Surface (high noise level =

low S/N ratio)

Surface Seismic

Receiver array

Long Array Coverage Short Array Coverage

Weathering layer x 2

(high attenuation = low freq)

Long array => the large

reflection angle range

needed for inversion of

Surface Seismic Imaging Borehole Seismic Imaging with short arrays Borehole Seismic Imaging with ultra long arrays

Borehole (low

noise level =

high S/N ratio)

Interferometric Imaging

using receivers below

weathering layer

Weathering layer

X 1 (low

attenuation =

high freq)

Borehole (low

noise level =

high S/N ratio)

Weathering layer

X 1 (low

attenuation =

high freq)

More Receivers = Better Image

Seismic

Micro Seismic – a closer look!

Examples of Fault Imaging using

Borehole Seismology

SAFOD Survey Site – Parkfield, California

Zoback (2006) Alden (2009)

San Andreas Fault Survey Site – Parkfield, California

USGS 2005

The 3rd generation, 80 level

4,000 ft long array is too short –

should have use a longer array -

but not available in 2005!

The 80 level Receiver Array

VSP 1D P-Wave Velocity Inversion

A “Zero Offset” Micro Seismic Event Recorded on a Paulsson 3rd Generation Borehole Seismic Array

MD (m)

FT FN V

•P and S Wave Velocity Inversions using Micro-seismic Data:

•This is only possible with an Ultra Long Borehole Seismic Array

Red: pushing first break

Green: pulling first break

Micro-Seismic Source Locations (Top View). Data from the 3rd Gen Paulsson Borehole Seismic Array

Micro-Seismic Source Locations (3D View)

80 km3 monitored Red: pushing first break

Blue: Pulling first break

A Micro-Seismic Event (5/1/2005 19:27) MD (m)

FT FN V

USGS: M1.26

Micro-Seismic Source Locations

A Micro-Seismic Event (5/4/2005 9:23) MD (m)

FT FN V

USGS: M1.86

Frio CO2 Site, VSP Deconvolved + Upgoing P Waves

Using Paulsson 3rd Generation Borehole Seismic Array

Shot #1 - upgoing Shot #1 - deconvolved He & Paulsson, 2011

Frio VSP: P & S Velocity Models

Using Paulsson’s 3rd Generation Array

He & Paulsson, 2011

High Quality Velocity Model needed to map Micro Seismic Events

Generalized Interferometric Migration (GIM)

of Side Reflections in VSP Data

He & Paulsson, 2011

Paulsson 3rd Generation Borehole Seismic Data

Hodograms to Determine Vector of Reflection

VSP Generalized Interferometric Migration (MIG)

of a Salt Flank (red) & Faults (yellow)

He & Paulsson, 2011

Frio CO2 Site: Surface Seismic Image

with VSP mapped Salt Flank location

~ 3000 ft

Salt flank Image

from VSP

He & Paulsson, 2011

Frio Well Ties: Compare Fault image from well log

geology and from VSP imaging

Well # 4 Well # 3

Image of fault

from VSP data

Baseline – 2002 Monitor – 2003 after 18 months

Depth Amplitude Maps showing the CO2 Injection

O’Brien et al., 2004

Change of reflectivity due

to the injected CO2

Paulsson 3rd Generation Borehole Seismic arrays

used for CO2 Time Lapse Monitoring Surveys

Accomplishments to Date

– Developed an Ultra Sensitive Fiber Optic Geophone

– Tested the Fiber Optic Geophone at High Temperature at

large Range of Frequencies and Loads

– Developed a Facility to Manufacture High Performance

Fiber Optic Geophone (FOG’s) Arrays

– Designed and built a 30,000 psi capable 3C geophone

pod for the Fiber Optic Geophones

– Developed a Deployment System strong enough to

deploy a 1,000 level 3C borehole seismic arrays in

vertical and horizontal boreholes.

– Manufactured components for a five level FOG array

1. Fiber Optic Sensor Development

2. Deployment System Development

Public Service of Colorado Ponnequin Wind Farm

The Clean Room for the Manufacturing of the

300ºC Fiber Optic Borehole Geophones

The 300ºC Dynamic Test Station for the 300ºC

Fiber Optic Borehole Geophones

Dynamic Test Facility

- Sensors are mounted onto a plate on the shaker

table: Swept frequency (0 up to 4kHz)

- Accelerometer (x2) and Electric Geophone signal

are both directly captured by the DAQ system

(oscilloscope/Spectrum Analyzer).

- The Paulsson Fiber Optic Geophone signal:

- The optical measurement is the differential phase

(radians)

- The measured modulated phase is first analyzed by

the interrogator, then

- The optical modulation is then converted to electric

signal (digital).

Dynamic Test Station Noise Improvements: April – August 2012

Noise @ 60 Hz, 120 Hz, 180Hz

Shaker Blower Noises

April 2012: Shaker On (but no vibration)

August 2012: Shaker On (but no vibration)

Noise Floor has been improved by a factor > 100

Paulsson Fiber Optic Geophone (PFOG)

Improved Sensor’s Sensitivity > 4x in V2 vs. V1

Both sensors being driven @ 10mG and 200 Hz

- Great Improvements in sensitivity in V2 ( > 4x Improvement!) compared with V1.

- Sensor will be better isolated in a down-hole environment where the temperature will

also be stable

Environmental noise

- Great Improvements in noise floor in V2 compared to V1

- As expected, we still experience higher environmental noises in our lab at low frequencies.

- Sensor will be better isolated in a down-hole environment where the temperature will also be stable

- We are confident, we can reduce the noise floor to < 10 nG for the whole band in the near future

Fiber Optic Geophones and Interrogator Noise Floor

Sensor’s Sensitivity and noise floor improvement

THE PAULSSON FIBER OPTIC

GEOPHONE

OTHER SENSORS

@ 25°C

All Sensors - Frequency Response (10 Hz 400 Hz)

using a 600 µG Acceleration @ 25°C

0.0002

0.0004

0.0006

0.0008

0 20 40 60 80 100 120 140 160 180 200

Frequency (Hz)

10 to 200 Hz 600 µG Sweep @ 25°C PCB (Ref)

15 Hz High Temp Geophone

PCB Acc

0.0002

0.0004

0.0006

0.0008

0 50 100 150 200 250 300 350 400

Frequency (Hz)

PCB Acc

Mounting plate imbalance

0.0002

0.0004

0.0006

0.0008

0 100 200 300 400 500 600 700 800

Frequency (Hz)

PCB Acc

0.0002

0.0004

0.0006

0.0008

0 200 400 600 800 1000 1200

Frequency (Hz)

10 to 1200 Hz 600 µG Sweep @25°C PCB (Ref)

PCB Acc

Mounting system resonance Mounting plate imbalance

THE PAULSSON FIBER OPTIC

GEOPHONE

OTHER SENSORS

@ 200°C

All Sensors - Frequency Response (10 Hz 400 Hz)

using a 600 µG Acceleration @ 200°C

0.0000

0.0002

0.0004

0.0006

0.0008

0.0010

0 100 200 300 400 500 600 700 800

Frequency (Hz)

PCB Acc

0.0002

0.0004

0.0006

0.0008

0 100 200 300 400 500 600 700 800

Frequency (Hz)

PCB Acc

High Precision Low Frequency

Vibration System @ Low Amplitude

PFOG Performance Test at Frequencies < 1Hz

Test @

0.03 Hz

- 3 PFOGs are mounted axially to motion and modulated at 0.03 Hz

- The motion is controlled by a PC at all frequencies (from <1 Hz to higher frequencies)

Test @

0.03 Hz

- Single PFOG sensor modulated at 0.03 Hz (33 seconds period)

- The Actuator is controlled by a PC at all frequencies (from <1 Hz to higher frequencies)

PFOG Test @ 0.03 – 1 Hz (33 – 1 sec period)

0.00 0.20 0.40 0.60 0.80 1.00

Frequency (Hz)

Low Frequency Response Amplitude

Seismic Traces from Tap Test Simultaneous Acquisition of all sensors; Band Pass Filter: 5 – 2,500 Hz

Reference Accelerometer

Reference 15 Hz Geophone

Fiber Optic Geophone (FOG)

Note the high S/N ratio

1. Fiber-Optic Geophone’s design is successful

a. Flat frequency response over a large frequency

b. Low Frequency performance

c. Very high sensitivity

d. High Signal to Noise ratio

2. Outstanding Issues

a. Resonances in the test setup

b. Facility’s environmental noise

c. Interrogation system tuning

Conclusions

The OpticSeis™ 3C Pod

For The Fiber Optic Geophone

2” OD

1. Fiber Optic Sensor Development

2. Deployment System Development

Drill Pipe Based Borehole Seismic

Deployment System

The Borehole Seismic Deployment System

Drill Pipe Based Deployment System

Pipe Strength: 140,000 lbs (verified July 25, 2011)

Depth Capability: 30,000 ft

Pressure Rating: 30,000 psi

Clamping Actuators: 572ºF (300ºC)

Temperature for Optical System: 572ºF (300ºC)

Optical 3C Levels: 1,000

Deployable in both Vertical and Horizontal wells

Geophone Pod

Housing

and the Fiber Optic

Pod Geophone pod

Casing Casing

Destructive Testing of Tool Joints

Test of Tool Joints for

Seismic Array on Nov. 22, 2010

Measured Strength: 210,000 lbs.

Failed at 238,000 lbs.

Destructive Testing of Deployment drill pipe

Test of Deployment Drill Pipe for

Seismic Array on July 25, 2011

Measured Strength: 145,000 lbs.

Failed at 160,000 lbs.

Strength: 145,000 lbs.

Before Failure After Failure

Deployment Drill Pipe During Manufacturing

15,000 ft of Deployment Drill Pipe

4 min. 10 sec.

4 min. 27 sec.

Destructive Test of Geophone Pod Housing

20,000 lbs.

300,000 lbs.

¾” elongation

4 min. 27 sec.

4 min. 28 sec.

Destructive Test of Geophone Pod Housing

July 30, 2012

300,000 lbs.

303,100 lbs.

Paulsson Project Summary

– Fiber Optic Geophones (FOG’s) are more sensitive than

regular geophones

– FOG’s can operate at high temperature

– FOG’s have a very large band width: 0.03 Hz – 4kHz

– Lessons Learned:

• Require a high quality measurement and calibration system

• Manufacturing is expensive

• Manufacturing takes a long time and must be carefully tracked

– Currently Building a Five Level 3C Array

– Plan to test Five level array in September 2012

– Complete a 150 level 3C FOG array in 2013

Thank you!

www.paulsson.com

Appendix

– These slides will not be discussed during the

presentation, but are mandatory

Project Team and Project Organization

• Project Team

• Paulsson, Inc. − Principal Investigator, System design, Fiber Optic Sensor

Design and Manufacturer, Design geophone pods

• Fiber Optic Interrogator Manufacturer − System noise abatement, Interrogator design & manufac.

• Drill Pipe Manufacturer − Design tool joints, manufacture drill pipe and related

components

• Machine Shops − Manufacture geophone pods, geophone pod housings

and other components

Paulsson Organization Chart

Paulsson, Inc.

Fiber Optic Interrogator

Manufacturer

Drill Pipe Manufacturer

Machine Shops

Engineering Consultants

Paulsson Fiber Optic Geophone

Project Gantt Chart

Bibliography

List peer reviewed publications generated from

project per the format of the examples below

• First Publication Expected in 2013

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