LA Asia Pacific Updated 2026-08-20

Laos Geothermal Screening

Geothermal screening assessment identifies 21.3% prospective land reaching 185°C by 5.5 km depth in Laos.

Key Geothermal Metrics

Land Reaching 185°C by 5.5 km Moderate
21.3%

Primary baseline screening criterion

Shallowest Depth to 200°C Deep Target
4.6 km

Minimum drill depth for high enthalpy

Peak Temperature at 5 km Depth Commercial EGS
235.5 °C

Maximum modeled temperature

Typical Geothermal Gradient Elevated
42 °C/km

Average to 5 km depth (15°C surface)

Grid Connectable Prospective Area High Accessibility
88.5%

Hot territory within 50 km transmission

Stored Heat In-Place (3–7 km) 1 ZJ = 10²¹ Joules
54.5 ZJ

Thermal volume in place (>80°C baseline)

Depth vs. Temperature Matrix (% Land Area)

Proportion of national territory exceeding target isotherm at specified depth

0.1° Inversion Grid
Isotherm 3.0 km 4.0 km 5.0 km 6.0 km 7.0 km 8.0 km
150°C 4.2% 11.8% 16.1% 26.5% 28.3% 39.2%
175°C 4.8% 8.6% 13.5% 19.9% 23.1% 26.9%
200°C 2.6% 7.2% 9.9% 13.7% 17.4% 23.5%
225°C 2.5% 5.1% 7.4% 11.2% 12.5% 17.3%
250°C 1.5% 2.8% 5% 6.3% 7.2% 10.4%

4-Stage Geothermal Resource & Infrastructure Funnel

Progressive screening from gross national territory down to grid-connected & populated prospective zones

1 Whole country
236 800 km² 100%
2 Reaches 185°C by 5.5 km
50 438 km² 21.3%
3 ...and within 50 km transmission
44 638 km² 18.9%
4 ...and within 100 km town
40 273 km² 17.5%

Geological Setting & Subsurface Parameters

Lithology, basement thickness, stress and thermal boundary constraints

Median Depth to 200°C Isotherm 6.6 km
Best 10th Percentile Depth to 200°C 5.3 km
Median Temperature at 5 km Depth 189.4 °C
Best 10th Percentile Temp at 5 km 211.5 °C
Median Sediment Thickness 1.3 km
Sediment / Hard-Rock Well Share 22.3%
Territory Under 1 km Sediment Cover 41.1%
Lithostatic Pressure at 5 km Depth 134.3 MPa
Moho Crustal Discontinuity Depth 32.3 km
Thermal Lithosphere Thickness 91 km
Curie Temperature Isotherm Depth 25.3 km
Model Temperature Spread Uncertainty (200°C) ±1.1 km

Transmission Grid & Demand Colocation

Infrastructure interconnectivity and urban power demand proximity

High-Voltage Transmission Network Length 10 290 km
Land Area Within 25 km of Grid 72.1%
Land Area Within 50 km of Grid 88.5%
Land Area Within 100 km of Grid 98.6%
Average Proximity to Nearest Substation / Line 18.2 km
Urban Centers (>10,000 Population) 73
Total Urban Population 20.9 M
Prospective Resource Colocated Near Demand (>1M Pop) 43%

Target Sensitivity & Deep EGS Upside

Sensitivity of prospective resource area to adjusted depth and temperature thresholds

150°C Baseline at 5.5 km 34.1% of national territory reaches 150°C at 5.5 km depth
185°C Baseline at 7.5 km 38.3% of national territory reaches 185°C at 7.5 km depth

Global Peer Benchmarking (vs. 278 Assessed Jurisdictions)

Relative ranking distribution of Laos across 11 standardized geothermal indicators

Laos Rank Global Peer Spread
Shallowest 200°C depth
4.6 km Lower 50%
P0 (Lowest) P50 (Median) P100 (Highest) • 49th percentile
Peak temp at 5 km
235.5 °C Middle 50%
P0 (Lowest) P50 (Median) P100 (Highest) • 54th percentile
Prospective land area (>185°C at 5.5 km)
21.3% Lower 50%
P0 (Lowest) P50 (Median) P100 (Highest) • 36th percentile
Stored heat in-place (3-7 km)
54.5 ZJ Middle 50%
P0 (Lowest) P50 (Median) P100 (Highest) • 54th percentile
Typical geothermal gradient
42 °C/km Middle 50%
P0 (Lowest) P50 (Median) P100 (Highest) • 60th percentile
Grid proximity (<50 km)
88.5% Top 25%
P0 (Lowest) P50 (Median) P100 (Highest) • 88th percentile
Thin sediment coverage (<1 km)
41.1% Lower 50%
P0 (Lowest) P50 (Median) P100 (Highest) • 41th percentile
Curie isotherm depth
25.3 km Lower 50%
P0 (Lowest) P50 (Median) P100 (Highest) • 44th percentile
Moho crustal thickness
32.3 km Lower 50%
P0 (Lowest) P50 (Median) P100 (Highest) • 42th percentile
Model temperature uncertainty spread
±1.1 km Middle 50%
P0 (Lowest) P50 (Median) P100 (Highest) • 46th percentile
Urban demand colocation
39.8% Top 25%
P0 (Lowest) P50 (Median) P100 (Highest) • 79th percentile
Asset-Level 3D Simulation Available

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Analytical Geothermal Assessment & Discussion: Laos

Subsurface thermal interpretation, model uncertainty, infrastructure colocation, and resource quality analysis

Resource Overview

Geothermal assessment for Laos indicates granite_radiogenic geological controls governing subsurface heat transport, yielding 21.3% of land area reaching the baseline target of 185°C at 5.5 km depth.

Uncertainty & Model Variance

Thermal inversion across Laos shows consistent model convergence with constrained standard deviations across deep crustal layers.

Grid & Infrastructure Colocation

National electrical transmission coverage positions approximately 88.5% of prospective geothermal ground within 50 km of existing high-voltage corridors.

Geological & Basement Setting

Subsurface lithology is characterized by granite radiogenic dynamics with median sediment thickness of 1.3 km and crustal thickness of 32.3 km.

Stored Heat Volume

Accessible thermal energy in place between 3 km and 7 km depth above 80°C totals 54.5 Zettajoules (ZJ).

Peer Comparison

Benchmarked against 237 global assessment jurisdictions, Laos demonstrates competitive positioning across heat flow, infrastructure, and basement competence indicators.

Target Sensitivity Analysis

Screening at 150°C baseline at 5.5 km increases prospective territory, demonstrating substantial deep EGS resource headroom.

Screening Methodology, Parameters & Limitations

This screening assessment for Laos is generated from Geothermal Radar Data Pack 2026.1 utilizing global 0.1° hex-grid thermal inversion across 2 631 model cells (land area: 236 800 km²). Baseline prospective criterion is defined as reaching 185°C at or above 5.5 km depth with surface temperature normalized to 15°C.

  • Screening estimates represent regional-scale heat in place and do not replace localized 3D seismic or exploratory drilling.
  • Model uncertainties expand in regions with sparse deep boreholes and complex thrust fault kinematics.
  • Grid proximity indicators reflect line-of-sight distance to high-voltage transmission and do not account for local substation thermal capacity.
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