Block No. 1, Texas, USA — Shale-gas anomaly survey (>120 km²)
RS-NMR study on a >120 km² Texas block to identify shale-gas occurrences, showing accumulation only along porous fault zones with gas migrating from major deposits at high pressure. Confirmed by drilling at 3.5 km depth and ~620 kg/cm² (~65 MPa) gas pressure.
Objective
Identify the spatial distribution of shale-gas accumulation across a >120 km² licence block and characterise the migration pathway from primary deposits.
Approach
Stage 1 RS-NMR satellite-imagery analysis across the >120 km² block, followed by Stage 2 portable-equipment measurements at points along selected geological transects. Anomaly boundaries mapped relative to fault-zone fabric.
Outcome
Survey showed shale-gas accumulation concentrated only along porous fault zones, with active migration from major gas deposits at high pressure. Confirmed by a well drilled in a detected anomaly which encountered a gas deposit at 3.5 km depth with gas pressure of 620 kg/cm² (~65 MPa).
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