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深盆氣
Deep Basin Gas is short for deep basin gas accumulation.It is an abnormal gas accumulation whose formation conditions,trapping mechanism and distribution are different from those of normal gas accumulations.Deep basin gas
accumulation is characterized by gentle dip angles,subnormal pressure,gas- water inversion and co-occurrence of reservoir and source rock.The fundamental conditions favourable to the formation of deep basin gas accumulation include a plentiful gas source,tight reservoir and tight seal under the reservoir.