A NEW TYPE OF SHALLOW NATURAL GAS WITH BROAD EXPLORATION PROSPECT──THEREGENERATED BIOGENIC GAS FROM OIL RESERVOIR AND COAL SEAMS BY THE DEGRADATON OF ANAERODIC BACTERIA

Tbe biogenous natural gas of regenerated type is a widespread shallow natural gas which is a regenerated energy sotirce by the degradation of the anaerobic bacteria(mainly-methanegenerated bacteria)from shallow oil reservoir and coal seams under a reduction condition. Such an understanding breaks through the conception that biogenic natural gas could only be discovered in shallow unmatured players, and expands the exploration field-into oil-bearing and coal-bearing basins and even some salt-bearing and alkali-bearing basins,which are attributed to shallow-buried and thermal mature type. So this kind of shallow natural gas would be a significaiit prospecting and can probably become a main resource type of biogenic gas of our country in the future.