Geothermal triplet LTG-GT-04 & LTG-GT-05 & LTG-GT-06
Start drilling: Mid april 2020
End drilling: December 2020
Target: Aquifer in the Slochteren Sandstone formation
Depth (AH): 1962m; 2286m; 2275m
Depth (TVD): 1851m; 1830m; 1821m
Project Summary
Client: | Aardwarmte Combinatie Luttelgeest (ACL) B.V. |
Triplet: | Luttelgeest / ACL Triplet |
Wells: | LTG-GT-04 & LTG-GT-05 & LTG-GT-06 |
Start drilling: | Mid April 2020 |
End drilling: | December 2020 |
Target: | Aquifer in the Slochteren Sandstone Formation |
Result: | Successfully drilled wells, disappointing test results |
Power (thermal): | 14 MWTh |
Depths (AH): | LTG-GT-04: 1962m; LTG-GT-05: 2286m; LTG-GT-06: 2275m |
Depths (TVD): | LTG-GT-04: 1851m; LTG-GT-05: 1830m; LTG-GT-06: 1821m |
Role of WEP: | Drilling Supervision, HSE and subsequent support (on-site and office based) during the well delivery phase |
Challenges: | Execution during COVID-19 “intelligent lockdown”, Unconventional sizes in production well |
New Technology: | Not applicable |
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.