Laboratory tests on water samples from the Korangi Creek gas leak have confirmed the presence of underground hydrocarbons, indicating continuous leakage from subsurface faults or fractures.
The chemical analysis suggests that the gas is thermogenic, originating from deep reservoirs rather than biological activity near the surface.
The samples revealed high concentrations of benzene, toluene, and tetrachloroethane, along with elevated levels of o-xylene, all commonly linked to petroleum hydrocarbons or natural gas condensate.
Despite visible flames and bubbling water in the affected area, the overall hydrocarbon content in the water remains below regulatory limits.
However, the detection of volatile organic compounds (VOCs) suggests that gas is escaping through underground fractures, fueling a persistent fire that has been burning for over nine days.
Borehole water samples also showed contamination with VOCs associated with hydrocarbon-rich formations, reinforcing evidence of ongoing gas leakage.
The presence of tetrachloroethane (PCE), often used in industrial settings, suggests migration due to pressure fluctuations or fractured formations.
The lab report also identified thermogenic signatures, confirming that the methane detected is not a product of surface-level biological activity but rather a mix of aromatic hydrocarbons and chlorinated solvents, pointing to a deeper gas source.
Experts warn that these substances are both flammable and toxic, posing serious health risks if they enter the atmosphere. As a safety measure, residents in the surrounding areas are advised to wear masks and take necessary precautions.
The findings indicate that natural gas or methyl vapors may have accumulated near the surface due to poor sealing or sudden pressure changes, leading to the prolonged fire.