Drilling Techniques

From Open Energy Information

GEOTHERMAL ENERGY

Exploration Technique: Drilling Techniques

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Exploration Technique Information
Exploration Group: Drilling Techniques
Exploration Sub Group: None
Parent Exploration Technique: Exploration Techniques
Information Provided by Technique
Lithology: Identify lithology and mineralization, provide core samples and rock cuttings
Stratigraphic/Structural: Retrieved samples can be used to identify stratigraphy and structural features such as fracture networks or faults
Hydrological: -Water samples can be used for geochemical analysis

-Fluid pressures can be used to estimate flow rates

Thermal: -Temperatures can be measured within the hole

-Thermal conductivity measurements can be done on retrieved samples.

Drilling Techniques:
There are a variety of drilling techniques which can be used to sink a borehole into the ground. Each has its advantages and disadvantages, in terms of the depth to which it can drill, the type of sample returned, the costs involved and penetration rates achieved. There are two basic types of drills: drills which produce rock chips, and drills which produce core samples.
Other definitions:Wikipedia Reegle


Introduction
Property "IntroText" (as page type) with input value "Drilling techniques are normally the final stages of exploration because drilling is the most expensive form of exploration. Drilling cost vary widely depending on the size and depth of the hole being drilled. Other factors that affect drilling costs and methods are types of formations being drilled through, well casings being used, equipment available, reservoir temperature, and pressure. Drilling of large diameter, deep production wells can be very complicating and often unexpected events occur which slow drilling down and can drastically raise costs." contains invalid characters or is incomplete and therefore can cause unexpected results during a query or annotation process. Drilling techniques are normally the final stages of exploration because drilling is the most expensive form of exploration. Drilling cost vary widely depending on the size and depth of the hole being drilled. Other factors that affect drilling costs and methods are types of formations being drilled through, well casings being used, equipment available, reservoir temperature, and pressure. Drilling of large diameter, deep production wells can be very complicating and often unexpected events occur which slow drilling down and can drastically raise costs.
Use in Geothermal Exploration
Property "GeoUse" (as page type) with input value "Drilling techniques are essential for commercial geothermal electricity production as we know it today. Drilling is required to retrieve fluids from the reservoir that are hot enough and under enough pressure to spin a turbine and generator. Drilling techniques are a very important exploration techniques as well as an essential step toward utilization." contains invalid characters or is incomplete and therefore can cause unexpected results during a query or annotation process. Drilling techniques are essential for commercial geothermal electricity production as we know it today. Drilling is required to retrieve fluids from the reservoir that are hot enough and under enough pressure to spin a turbine and generator. Drilling techniques are a very important exploration techniques as well as an essential step toward utilization.
Related Techniques
Property "Subcategories" (as page type) with input value "* Drilling Techniques</br>** Development Drilling</br>*** Observation Wells</br>*** Production Wells</br>*** Well Deepening</br>** Exploration Drilling</br>*** Core Holes</br>*** Exploratory Boreholes</br>*** Exploratory Well</br>*** Hydroprobe</br>*** Microhole Array</br>*** Slim Holes</br>*** Step-out Well</br>*** [[:Thermal Gradient Holes|Thermal Gradient Holes" contains invalid characters or is incomplete and therefore can cause unexpected results during a query or annotation process. * Drilling Techniques

Field Procedures
Drilling normally begins with small diameter shallow wells such as Thermal Gradient Holes, Slim Holes, or Core Holes. Once data are gathered from the more inexpensive drilling methods a better reservoir model can be made and then locations for further drilling can be narrowed down. Once a confident reservoir model is made Development Drilling methods can be employed.

A geothermal well being drilled [1]Using "ReferenceForhttp://www.renewablepowernews.com/archives/913" as property chain is not permitted during the annotation process.


Best Practices
Preform less expensive shallow exploration drilling techniques first. Once a confident reservoir model is established Development Drilling
Potential Pitfalls
-Drilling is expensive and time consuming, unsuccessful drilling may lead to failure of a project.

-Drilling can be dangerous.

-Most drilling methods need a drilling pad which requires a small amount of land to be cleared for the drilling rig and all associated equipment. In many locations access roads need to be constructed so all the drilling equipment can be transported to the drilling location.


Additional References
http://msface.webs.com/documents/Baker%20Huges%20-%20Drilling%20Engineering%20Handbook.pdf

References
  1. ↑ Renewable Power News. Safety Measures a hinder for Geothermal Drilling [Internet]. 2010. [cited 2013/10/07]. Available from: http://www.renewablepowernews.com/archives/913


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      Document #Analysis
      Type      		ApplicantGeothermal
      Area      		Lead
      Agency      		District
      Office      		Field
      Office      		Mineral
      Manager      		Surface
      Manager      		Development
      Phase(s)      		Techniques
      BLM-NV-WN-ES-08-01-1310, NV-020-08-01EANevada Geothermal PowerBlue Mountain Geothermal AreaBureau of Land ManagementBLM Winnemucca District OfficeBLM Humboldt River Field OfficeBureau of Land ManagementBureau of Land ManagementGeothermal/Power PlantDownhole Techniques
      Well Testing Techniques
      Drilling Techniques
      Development Drilling
      DOI-BLM-NM-L000-2012-0111-DNADNALightning Dock Geothermal IncLightning Dock Geothermal AreaBureau of Land ManagementBLM Las Cruces District OfficeBureau of Land ManagementGeothermal/ExplorationDrilling Techniques
      DOI-BLM-NM-L000-2012-0200-DNADNALightning Dock Geothermal IncLightning Dock Geothermal AreaBureau of Land ManagementBLM Las Cruces District OfficeBureau of Land ManagementGeothermal/Well FieldDrilling Techniques
      DOI-BLM-NV-0063-EA06-100EAOrmat Technologies IncJersey Valley Geothermal AreaBureau of Land ManagementBLM Winnemucca District OfficeBLM Humboldt River Field OfficeBureau of Land ManagementBureau of Land ManagementGeothermal/ExplorationWell Testing Techniques
      Drilling Techniques
      DOI-BLM-NV-B010-2011-0015-EAEAOrmat Technologies IncMcGinness Hills Geothermal AreaBureau of Land ManagementBLM Battle Mountain District OfficeBureau of Land ManagementBureau of Land ManagementGeothermal/Power PlantWell Testing Techniques
      Drilling Techniques
      Production Wells
      DOI-BLM-NV-B020-2011-0026-EAEARam PowerSilver Peak Geothermal AreaBureau of Land ManagementBLM Battle Mountain District OfficeBureau of Land ManagementBureau of Land ManagementGeothermal/ExplorationWell Testing Techniques
      Drilling Techniques
      Exploration Drilling
      DOI-BLM-NV-B020-2012-0214-EAEARockwood Lithium IncSilver Peak Geothermal AreaBureau of Land ManagementBLM Battle Mountain District OfficeBureau of Land ManagementBureau of Land ManagementGeothermal/ExplorationWell Testing Techniques
      Drilling Techniques
      DOI-BLM-NV-C010-2010-0006-DNADNAOrmat Technologies IncGabbs Valley Geothermal AreaBLM Nevada State OfficeBLM Carson City District OfficeBLM Stillwater Field OfficeBureau of Land ManagementBureau of Land ManagementGeothermal/ExplorationThermal Gradient Holes
      Drilling Techniques
      DOI-BLM-NV-C010-2010-0006-EAEAOrmat Technologies IncGabbs Valley Geothermal AreaBureau of Land ManagementBLM Carson City District OfficeBLM Stillwater Field OfficeBureau of Land ManagementBureau of Land ManagementGeothermal/ExplorationDownhole Techniques
      Well Testing Techniques
      Drilling Techniques
      Exploration Drilling
      DOI-BLM-NV-C010-2010-0008-EAEAMagma EnergySoda Lake Geothermal AreaBureau of Land ManagementBLM Carson City District OfficeBLM Stillwater Field OfficeBureau of Land ManagementBureau of Land ManagementGeothermal/ExplorationDownhole Techniques
      Well Testing Techniques
      Drilling Techniques
      Exploration Drilling
      DOI-BLM-NV-C010-2010-0010-EAEATerra-Gen Power LLCDixie Valley Geothermal AreaBureau of Land ManagementBLM Carson City District OfficeBLM Stillwater Field OfficeBureau of Land ManagementBureau of Land ManagementGeothermal/ExplorationDownhole Techniques
      Well Testing Techniques
      Drilling Techniques
      Exploration Drilling
      DOI-BLM-NV-C010-2010-0052-CXCXMagma EnergySoda Lake Geothermal AreaBLM Nevada State OfficeBLM Carson City District OfficeBLM Stillwater Field OfficeGeothermal/ExplorationThermal Gradient Holes
      Drilling Techniques
      DOI-BLM-NV-C010-2011-0516-EAEAOrmat Technologies IncDixie Meadows Geothermal AreaBureau of Land ManagementBLM Carson City District OfficeBLM Stillwater Field OfficeBureau of Land ManagementBureau of Land ManagementGeothermal/Exploration
      Geothermal/Well Field      		Thermal Gradient Holes
      Drilling Techniques
      DOI-BLM-NV-C010-2011-0517-DNADNAOrmat Technologies IncDead Horse Wells Geothermal AreaBureau of Land ManagementBLM Carson City District OfficeBLM Stillwater Field OfficeBureau of Land ManagementBureau of Land ManagementGeothermal/ExplorationDrilling Techniques
      DOI-BLM-NV-C010-2012-0029-EAEAOrmat Technologies IncTungsten Mountain Geothermal AreaBureau of Land ManagementBLM Carson City District OfficeBLM Stillwater Field OfficeBureau of Land ManagementBureau of Land ManagementGeothermal/Well FieldDownhole Techniques
      Well Testing Techniques
      Drilling Techniques
      Exploration Drilling
      DOI-BLM-NV-C010-2012-0050-EAEAOrmat Technologies IncDead Horse Wells Geothermal AreaBureau of Land ManagementBLM Carson City District OfficeBLM Stillwater Field OfficeBureau of Land ManagementBureau of Land ManagementGeothermal/Well Field
      Geothermal/Power Plant      		Drilling Techniques
      Development Drilling
      DOI-BLM-OR-P000-2010-0003-EAEADavenport Power LLCNewberry Caldera Geothermal AreaBureau of Land ManagementBLM Prineville District OfficeBureau of Land ManagementUnited States Forest ServiceGeothermal/ExplorationWell Testing Techniques
      Drilling Techniques
      Exploration Drilling
      Seismic Techniques
      Passive Seismic Techniques
      DOI-BLM-OR-P000-2011-0003-EAEADavenport Power LLCNewberry Caldera Geothermal AreaBureau of Land ManagementBLM Prineville District OfficeBureau of Land ManagementUnited States Forest ServiceGeothermal/Well FieldDrilling Techniques
      DOI-BLM-OR-P040-0021-EAEAOrmat Technologies IncGlass Buttes Geothermal AreaBureau of Land ManagementBLM Prineville District Office
      BLM Burns District Office      		Bureau of Land ManagementBureau of Land ManagementGeothermal/ExplorationDrilling Techniques
      EA for Well Field Development at Patua Geothermal Area - DOI-BLM-NV-C010-2011-00016-EAEAGradient ResourcesPatua Geothermal AreaBureau of Land ManagementBLM Carson City District OfficeBLM Stillwater Field OfficeBureau of Land ManagementBureau of Land Management
      Bureau of Reclamation      		Geothermal/Exploration
      Geothermal/Well Field      		Thermal Gradient Holes
      Drilling Techniques
      Exploratory Well
      LLNV-WO1000-2009-0002-EAEAOrmat Technologies IncJersey Valley Geothermal AreaBLM Nevada State OfficeBLM Winnemucca District OfficeBLM Humboldt River Field OfficeBureau of Land ManagementBureau of Land ManagementGeothermal/ExplorationDrilling Techniques
      Observation Wells
      NV-020-07-EA-01EAOrmat Technologies IncJersey Valley Geothermal AreaBureau of Land ManagementBLM Winnemucca District OfficeBureau of Land ManagementBureau of Land ManagementGeothermal/Exploration
      Geothermal/Well Field      		Drilling Techniques
      Observation Wells


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