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P17 · I.06(b) · Tools · Industrial · Low carbon drilling

Low carbon drilling — multi-lateral geothermal pathways

Deep multi-lateral designs (Li · H₂ · CO₂ · closed-loop / Eavor-class) and the industrial transfer of drilling know-how to low-carbon heat — with EGS, France potential maps, and a clear priority on low-risk surface geothermal.

GEO-MULTI-LATERAL-SPECS-LI-H2-CO2-EAVOR-FD-2026 · Rev 3G · François Dorléans · EngEthics

Public enquiry dossiers — deep geothermal
Public enquiry stack (Aulnergie · Aulnay-sous-Bois) — the paper density of deep geothermal projects; industrialisation is still rare compared with oil & gas campaigns.
Present · DFKPS PDF Rev 3G DOCX Rev 3G I.06(a) Drilling SOA I.06(c) Casing design Industrial tools

Partner review (protected): each section has a #tag. Comments blocked for public until ?role=partner.

1. Purpose & master documents

2. Multi-lateral architectures (including “lobster antenna” layouts)

3. EGS — Enhanced Geothermal Systems

4. Under our feet — perception vs industrial reality

5. France — basins, heat operations & official maps

BRGM — deep aquifer resources in metropolitan France and operating heat operations (2018)
Figure 1 (BRGM) — Deep aquifer resources in metropolitan France and heat operations in service (2018). Orange: operating geothermal heat plants. Blues: potential or proven resources (>70 °C / >100 °C) and geological basin extent. Official source figure — decisions require current geothermies.fr / BRGM WMS layers.

6. Deep geothermal vs oil & gas — shared tools, unequal ROI

7. What is useful and feasible immediately

8. Priority path — intense surface geothermal (< ~200 m)

Geothermal suitability — indicative global map

Indicative global geothermal suitability map with legend
Artistic reading of geothermal suitability / capacity indices (not a substitute for BRGM / D4Science official layers). Use for project storytelling and engagement; decisions require sovereign map services.