Geothermal

Geothermal: ACL Luttelgeest drilling triplet

Project Description

Drillmec HH300 (contracted via GERF, operated by D&S) has been rigged up in Q1 2020. Mid-April 2020 drilling operations of the first well commence. WEP has been contracted by ACL to provide supervisional support on the well deliveries (both on site and back-office) and testing of the wells. Expectations are high, nextdoor of the Hoogweg Aardwarmte project (also a triplet: LTG-GT-01, 02 & 03) which is producing/exploiting geothermal heat since 2018.

Late October 2020 LTG-GT-06, the last of the three wells was drilled to TD and tested. Unfortunately, the thickness of the geothermal aquifer (Slochteren formation) was found to be significantly less as anticipated, resulting in disappointing test results. Rig to be demobilized before the end of 2020. It is investigated whether the output of the well(s) can be improved.

Challenges

Execution during COVID-19 “intelligent lockdown”, Unconventional sizes in production well.

Role of WEP

Drilling Supervision, HSE and subsequent support (on-site and office based) during the well delivery phase.

Overview

  • Client
    Aardwarmte Combinatie Luttelgeest (ACL) B.V.
  • Location
    Luttelgeest / ACL Triplet
  • Well
    LTG-GT-04 & LTG-GT-05 & LTG-GT-06
  • Date
    Start drilling: 15 April 2020
    End execution: 23 December 2020
  • Objective
    Aquifer in the Slochteren Sandstone formation
  • Depth
    Depth (MD): LTG-GT-04: 1962m; LTG-GT-05: 2286m; LTG-GT-06: 2275m
    Depth (TVD): LTG-GT-04: 1851m; LTG-GT-05: 1830m; LTG-GT-06: 1821m

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Name
Geothermal triplet LTG-GT-04 & LTG-GT-05 & LTG-GT-06
Description
Execution during COVID-19 “intelligent lockdown”, Unconventional sizes in production well
Start Execution
April 15th, 2020
End Execution
December 23rd, 2020
Aquifer in the Slochteren Sandstone formation. Execution during COVID-19 “intelligent lockdown”, Unconventional sizes in production well.

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