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Local features of the gas volcanism and regional deep hydrocarbon system in the Shenhu area (northern continental slope of the South China Sea)
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 17th International Conference on Geoinformatics - Theoretical and Applied Aspects, May 2018, Volume 2018, p.1 - 6
Abstract
New anomalies of “gas hydrates reservoir and gas deposit” types in the drilling Shenchu area (South China Sea) were revealed by the frequency-resonance technology of the satellite images processing and decoding. The local area with very high reservoir pressure values of 67 MPa – possible vertical channel for deep gas bearing fluids migration – was detected. Diapers and mud volcanoes can have deep roots in the form of disturbances and fracture zones at the base of the sediments and near the basement. They may be connected both with deep sources of thermogenic methane and with shallow biogenic hydrates, since the nature of the occurrence of gas hydrates indicates their migratory character. Thermogenic gas in local structures of the Shenhu area possibly connected with vertical and lateral fluid pathways from a depth of 5 – 15 km, where the favorable conditions for the intermediate reservoirs of the abiogenic methane are existing. The obtained results confirmed the presence of the regional hydrocarbon system in local features with gas hydrates in their structure, which formed here in process of gas emanating along lateral fluid pathways from mud volcanoes and diapers with deep roots.