Electro Impulse Drilling and Innovative Configuration of ...iea-gia.org/wp-content/uploads/2017/11/1-05-Joerg-Impulse-Drilling... · Deployments of Rotary Steerable Technology ...
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Improved Recovery - Accumulated production at and over time
Secure Abandonment- Reduction of environmental impact and avoidance of consequential charges
Geothermal Power Plant Cost Distribution
Source: BMU Germany
Drilling
(up to 70 %)
Production pumps (2%)
Stimulation (2%)
Planing (3%)
Else (3%)
Conversion equipment
(15%)
Thermal water cycle
(5%)
Confidential. Not to be copied, distributed, or reproduced without prior approval.
Geothermal Drilling SolutionsIntegrated drilling service application research and development
Confidential. Not to be copied, distributed, or reproduced without prior approval.
Research & Development Focus
• Innovative Wellbore Construction
• Drilling Process Control and Automation
• Advanced High Temperature Drilling BHA
• Alternative Drilling Technologies
• Innovative Production Systems
Confidential. Not to be copied, distributed, or reproduced without prior approval.
November 18, 2017 14
Integrated Drilling Services
Total wellbore planning, construction, and management….
Feasibility studies,
well cost estimation,
and field
development plan
assistance
Advanced well engineering
and design, well placement
reviews; geo-mechanical,
reservoir and borehole
stability analysis
Detailed wellbore
construction
program with
maximum
efficiency and
less surprises
Client
BHGE
Confidential. Not to be copied, distributed, or reproduced without prior approval.
Problem Statement
15
• Drilling operation in sediments or in deep crystalline hot rock are characterized by inconsistent performance and high bit wear
• Depth and horizontal reach of wells are limited by weight of the BHA (WOB) and mechanical and hydraulically transmission of power
• In the E&P industry, drilling and completion expenses and return on investment are comparable
Geothermal Applications
Confidential. Not to be copied, distributed, or reproduced without prior approval.
Problem Statement
16
Representative Reduction of Rate of Penetration vs. Depth and Rock Strength
Source: MAURER, novel drilling techniques
confirmed at Continental Deep Drilling Project in Germany
Total Vertical Depth of
Well [m]
Rate of Penetration ROP - [meter/hour]
Rock-type
„Soft“
(σD˂ 50 MPa)
Medium
(σD = 50-100 MPa)
Hard
(σD ˃ 100 MPa)
0 – 2.000 15 – 50 5 – 15 1 – 5
2.000 – 4.000 10 – 30 4 – 10 1 – 4 (4 – 8)*
4.000 – 6.000 6 – 20 2 – 6 1 – 2 (2 - 3)**
6.000 – 8.000 N/A 1 – 2 1 – 2
(Source*: Baker Hughes Motors, RSS and WOB & vibration control SPE 122690, Promising Results from First Deployments of Rotary Steerable Technologyin Vietnam Basement Granite)
8.000 – 10.000 N/A N/A 1 or 2 ?
10.000 – 12.000 N/A N/A 0,5 or 1 ?
(Source**: Deep Geothermal Well in Granite Europe )Alternative
Technologies
DrillingOptimization
Based on summariesd data of mentioned literature sources – current ROP of drilling systems on the market might be different depending on geology and application
Confidential. Not to be copied, distributed, or reproduced without prior approval.
Problem Statement
17
Geothermal Hard Rock Applications
• Drill bit wear in deep Hard Rock drilling (4500 - 5000 m Vertical Depth)
Confidential. Not to be copied, distributed, or reproduced without prior approval.
Solutions
29
Research and Development on alternative Electro Impulse Drilling Technology
EIT-drilling head 500 mclose to no wear
of electrodes3 m/h
electric contact
to bottom
low NPT single trip400 m/h>20 %cost saving
Click on Picture to start Video
Confidential. Not to be copied, distributed, or reproduced without prior approval.
Electro Impulse Drilling
30
Working Principle of Electro Impulse Drilling Technology
time in ns
granite
water
die
lectr
icstr
ength
puls
e fie
ldstr
ength
in k
V/m
m
Confidential. Not to be copied, distributed, or reproduced without prior approval.
High Voltage / High Pressure Drilling Simulator
November 18, 2017 31
Design and Test
Plasma Light Reflection
Rock Sample
Confidential. Not to be copied, distributed, or reproduced without prior approval.
High Voltage / High Pressure Drilling Simulator
32
• High Pressure Tests with OBM completed
• Significant reduction of Mechanical Specific Energy (MSE) with optimized Electrode
• MSE close to PDC bit in OBM
• High pressure dependency of MSE in Water and WBM.
• Improvement of Hole Cleaning required
Results
0 100 200 300 400 500
MSE [kJ/cm³] over Pressure [bar]
BHGE PDC
BHGE OBM & Optimized Electrode
State of the art
BHGE OBM & TUD Ring Electrode
Confidential. Not to be copied, distributed, or reproduced without prior approval.
High Voltage / Low Pressure Test Results
33
Real Size Granit Rock excavation in Oil Based Drilling Fluid under Lab conditions
311 mm , 12.5 inchHole in Granite Sample
Star Electrode Design
Confidential. Not to be copied, distributed, or reproduced without prior approval.
34
• How to reduce high pressure dependency of MSE in Water and WBM ?
• How to achieve High Volume excavation ?
• Hole Quality, Cutting shape and size?
• Influence of - Electrode design- Test equipment- Electrical properties of Rock sampleand Fluid ‘impedance, permittivity’
- Porosity of samples
0
2
4
6
8
10
12
14
16
18
0 50 100 150 200 250 300 350 400 450 500
MSE [kJ/cm³] over pressure [bar]
MSE [kJ/cm³] TUD Electrode in Water 100 %
MSE [kJ/cm³] TUD Electrode in BHGE OBM
Linear (MSE [kJ/cm³] TUD Electrode in Water 100 %)
Linear (MSE [kJ/cm³] TUD Electrode in BHGE OBM)
Rock Excavation Efficiency under Pressure – Open Questions
High Volume Rock Excavation under Atmospheric pressure conditions in Water with 4” electrode design (16 cm³)
Confidential. Not to be copied, distributed, or reproduced without prior approval.
System- Evaluation and Test
TU BA Freiberg / TU DresdenField Lab
First Real Size Low Pressure In-Situ Test with an 12 ¼” Electrode
Logging of bottom of the wellborerevealed hole cleaning problems
November 18, 2017
35
Confidential. Not to be copied, distributed, or reproduced without prior approval.
Results of in-situ Test
• First electric impulse drilling rig lab setup at University
• High Voltage Generator Module ‘HVG’ and Electrode tested in water under low pressure drilling conditions
• Excavation of 50 mm of cement with a diameter of 12 ¼”
• Logging of wellbore revealed hole cleaning problem as reason for low ROP
• High voltage insulation of HVG to be improved to avoid short circuits
• Additional test with improved hole cleaning and HVG required in 2018
Confidential. Not to be copied, distributed, or reproduced without prior approval.
Conclusion and Outlook
• Advanced Drilling Technology enables faster drilling of complex well profiles and reduction of non productive drilling time > 50%
• Alternative Deep Drilling technologies have to be developed to reduce bit exchange trips and related NPT with acceptable ROP under pressure
• Further research on physics of EIT is required to secure performance under DH pressure conditions
• Utilize Virtualization and Automation tools to maximize productivity and recovery with predictable performance as a foundation for future drilling technologies
Confidential. Not to be copied, distributed, or reproduced without prior approval.
39
Fullstream Geothermal Solutions in Competition
Geothermal
• Base Load
Available every day
over the entire year
• Independent from
Supply chain and fuel price
• Low CO2 emission and
ecological footprint
Source: LAZARD Levelized Cost of Energy Analysis - Version 10.0 Dez 2016 page 8https://www.lazard.com/perspective/levelized-cost-of-energy-analysis-100/