中国石化东部探区潜山油气藏勘探前景

PROSPECT OF BURIED HILL RESERVOIRS IN SINOPEC EASTERN EXPLORATION REGION

潜山油气藏是中国石化东部探区重要的油气藏类型 ,其成藏条件受控于多种因素。从潜山的成山过程来看 ,先成潜山比后成潜山经历的溶蚀作用强 ,储层条件较好 ;从潜山储层的岩性来看 ,碳酸盐岩比碎屑岩更易遭受溶蚀 ,且储集空间易于保存 ;构造应力对潜山储层有一定的改善作用 ,表现在断裂和褶皱有利于裂缝和地下溶蚀的发育 ;潜山储层与上覆烃源岩和盖层之间的就近配置利于油气进入潜山圈闭而成藏。下一步的勘探应分 3个层次进行 :一是深化济阳坳陷 ,扩大储量规模 ;二是突破东濮凹陷和苏北盆地 ,形成新的场面 ;三是探索南襄盆地和江汉盆地 ,积极寻找新的领域。

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.