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Geothermal Energy

TIG 11 - Drilling & Well Construction

TIG 11 Well Operations - Leader: Dean Hindle, Geodynamics

Terms of Reference
  • Cooperating in studies to advance geothermal methods and technologies;
  • Cooperating to develop, collect, improve and disseminate geothermal-related information;
  • Identifying opportunities to facilitate the efficient advancement of geothermal energy projects; and
  • Disseminating information on geothermal energy
Topics in scope include but are not limited to:
  • Lower Cost Drilling: Investigate techniques and new technologies which may lead to a reduction in costs to drill geothermal wells.
  • Zonal Isolation and Packers: Isolation techniques and equipment need to be developed to isolate zones of interest (fractures or zones to be stimulated), at extremely high temperatures and possibly temperatures, to allow both stimulation and production through different zones.
  • Temporary Sealing of Fractures: Develop a non-damaging means of isolation fractures where multiple fractures / loss zones may be encountered.
  • Cutting Exploration Drilling Costs: A number of mechanisms can be developed to reduce costs, such as improving ROP, utilising smaller rigs, smaller hole sizes, correct selection of materials etc.
Project Descriptions

Theme
Project Name
Summary of key project objectives
Research Partners

TIG 11 Drilling and Well Construction
Lower Drilling Costs

Investigate techniques and new technologies which may lead to a reduction in costs to drill geothermal wells. Such initiatives include:

  • Investigate new drilling technologies (eg. Downhole fluid hammer, spallation drilling, particle impact drilling, jackbit, etc.)
  • Investigate ways to improving ROP (eg. use of clear drilling fluid, improved roller cone bit design, development of turbine bits, BHA design and vibration reduction, etc.)
  • Reserach slimmer, cheaper welld. This may include hte use of smaller drilling rigs.
Budget: The budget needs to be agreed amongst the team. Allowance needs to be made for:
  1. Possible travel to service company facilities where the technology will be developed. Estimate - 6 persons travel to the US $90k.
  2. Possible initial costs to develop and test agreed technology/tools. Estimate - $100k.
  3. In-kind time writing from sponsors.
  • GDY (Dean Hindle, Brett OLeary, Patrick Tomkins)
  • Nick Mueke
  • Natasha Cherednichenko
  • Geoff Stolz
  • CSIRO (Edson Nakagawa)
  • John King
  • John Dickson
  • Ian Spear
  • Melanie Vonthehoff
  • Peter Hudson
TIG 11 Drilling and Well Construction Zonal Isolation

Isolation techiques and equipment need to be developed to isolate zones of interest (fractures or zones to be stimulated), at extremely high temperatures nad possible pressures, to allow both stimulation and production through different zones. Possible techniques to be investigated/developed may include:

  • Development of ECP - both inflatable and mandrel type.
  • Suitable cements/alternate materials suitable for HT/corrosive environments.
Budget: The budget needs to be agreed amongst the team. Allowances need to be made for:
  1. Travel/discussion with suitable vendors of equipment.
  2. Possible engineering/development costs.
  3. Possible qualification testing costs.
  • Nick Mueke
  • CSIRO (Edson Nakagawa)
  • Melanie Vonthehoff
  • Adrian Slater
TIG 11 Drilling and Well Construction Temporary Sealing of Factures

Develop a non-damaging means of isolation fractures where multiple fractures/loss zones may be encountered. The use of traditional bridging agents may be possible, these will need to be tested. Other technology will be investigated and these may include degradable cements, epoxies, diverting agents, etc.

Budget: The budget needs to be agreed amongst the team. Allowances need to be made for:

  1. Travel/discussion with suitable vendors of equipment.
  2. Possible engineering/development costs.
  3. Possible qualification testing costs.
  4. Breakdown of budget contributing partners and amounts
  • Natasha Cherednichenko
  • CSIRO (Edson Nakagawa)

TIG 11 Drilling and Well Construction
Cutting Exploration and Drilling Costs
A number of mechanisms can be developes to reduce exploration costs. Some initiatives may include: utilising smaller rigs, drilling smaller holes, correct selection of materials, etc.

Budget: The budget needs to be agreed amongst the team.
  • Nick Mueke
  • John Dickson
  • Peter Hudson
  • Geoff Stolz
  • Ian Spear
  • Melanie Vonthehoff

Meetings
Deep Geothermal Well Engineering Workshop Agenda, 15 & 16 November 2010 (PDF)

Meeting and Teleconference, 16 September 2010, Geodynamics office, South Perth

Meeting and Teleconference, 10 March 2010, Geodynamics office, South Perth


Meeting and Teleconference, 3 February 2010
Senergy office, West Perth

Meeting and Teleconference, 14 December 2009, (PDF) Senergy office, West Perth

Meeting, 10 November 2009, (PDF) Brisbane

Teleconference, 20 October 2009 (PDF)

Teleconference, 3 September 2009 (PDF)

AGEG TIG Report Meeting #5, 20 - 21 November 2008