Gas Hydrates exploration

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Gas hydrates with their abundant resource potential is emerging as a potential fuel resource. The preliminary assessment of geological condition and limited available seismic data suggests high possibility of occurrence of large quantity of gas hydrates within the EEZ of India. The multi-channel seismic data collected by various organisations has been evaluated and based on the data, two promising sites of 100 km x 100 km were identified and surveyed in detail in the Krishna-Godavari (KG) and the Mahanadi basins. A total of 6660 line km of coarse grid data (with line spacing of 8 to 12 km) and 1067 km of fine grid seismic reflection data (with line spacing of 500 m) was acquired. In addition, 48 deployments of the Ocean Bottom seismometer were carried out with acquisition of 1055 line km of seismic refraction data. The seismic data is expected to provide the sediment profiles revealing signatures of gas hydrates. A remotely operated Autonomous Coring System (ACS) has been developed, equipped with tool handling system and cam gate assembly to drill each section of about 3 m [approximately 100m sediment core], retrieve the sample, and store in magazine at the seabed in deep sea operation [3000 m]. An exploratory tool (ROV) with necessary sensor is developed and an exploration trial at gas hydrate site is completed. Further, acquisition of high resolution sparker data has been carried out in the KG Basin.

Last Updated On 05/14/2014 - 16:49
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