Abstract:

The buried hill reservoir is the important type of oil and gas pools in SINOPEC eastern exploration region.Formtion of buried hill reservoir is controlled by several factors.In view of the formation of buried hill,the early-formed buried hills were subjected to a stronger dissolution than did late-formed buried hills,with better reservoir condition.In view of the reservoir lithology of buried hill,carbonate reservoir is easier to undergo dissolution than does clastic reservoir,with a relatively better preserving condition of reservoir space.Tectonic stress can reform the buried hill reservoir to some extent, as fault and fold are advantageous to the development of fracture and underground dissolution.The near disposition of source rock,reservoir rock and cap rock is favorable for oil and gas accumulation in buried hill traps. The future exploration of buried hill in SINOPEC eastern exploration region is (1) to conduct the further detailed prospecting in Jiyang sag in order to ensure stable reserve additions;(2)to drill the favorable traps in Dongpu and Subei sags for finding major discoveries in buried hill reservoirs;(3)to evaluate the exploration prospect of buried hill reservoirs in Nanxiang and Jianghan basins.

Key words: buried hill, reservoiring condition, petroleum accumulation, prospecting strategy