Well testing restarting

We are restarting geothermal well testing operations this morning. This follows a review of our injection testing programme after the seismicity that was felt and heard last Wednesday. We know that some people want to better understand what caused the felt seismicity last Wednesday. Microseismicity is linked to well testing during the early stages of […]

Felt seismicity – update

UPDATE AT 12:55 ON 1OTH MARCH 2022 The seismic event which occurred at approximately 9.20pm on 9th March was induced by injection testing at Eden Geothermal.  These tests have been ongoing since late January and have involved injecting fresh water into the natural fractures near the bottom of the well.  Injection testing induces low level […]

Reports of felt seismicity

We are aware that a seismic event was felt and heard in the vicinity of the Eden Geothermal site shortly after 9.20pm this evening. An investigation and analysis of seismic monitoring data have confirmed that the event was linked to testing operations at Eden Geothermal. No damage has been reported, and the event was within […]

Well testing at Eden Geothermal

We’re currently in a phase of testing our first geothermal well. Well tests provide us with essential information about the temperature and permeability of the rock in our target zone, and how water moves through the hot granite deep underground. The results of our tests will enable us to characterise the geothermal resource, and to […]

Geothermal heat main installation begins

Work has started on the installation of the new heat main that will supply Eden Project’s Biomes, greenhouses and other buildings with geothermal heat. The heat main consists of two 150mm (6”) steel pipes – a flow and return – each encapsulated in a thick layer of insulation to a total diameter of 280mm. They […]

We’re drilling our final 8 ½” section

Having successfully run and cemented casing in the 12¼” section of EG-1, we’re now into the final 8 ½” open hole section. The bits are grinding the granite to powder – as this cuttings sample from 4050m shows. Current depth is 4324m MD and we expect to intersect Great Crosscourse fault soon. The Eden Project […]

‘Drilling break’ a positive sign for project

Last week we encountered a ‘drilling break’ at 3949m. This is a great sign for the future of our project – the increased ROP (rate of penetration) and losses of drilling muds into the formation are indicators of a zone of natural fracturing and permeability in the rock. Heat and permeability are the prerequisites for […]

Drilling reaches 3755m

We’ve now drilled to 3755m MD so are approaching the end of the 12¼“ section of EG-1. At 4000m, we’ll be tripping out of the hole to run and cement casing (in other words to line this section), before embarking on the final section of the well, and the last part of our journey towards […]