丽水、椒江凹陷油气潜力分析和勘探突破口的选择

本文利用第四轮对外合作勘探成果分析台北坳陷丽水、椒江凹陷具有中国东部裂陷盆地的基本地质特征.下古新统优质烃源岩、丰富的油气资源和众多的圈闭是“九五”勘探的主战场.丽水凹陷已发现好的油气显示,是实现勘探突破的最现实地区,椒江凹陷勘探程度低是勘探的后备地区.以灵峰组为区域盖层的下古新统成油组合是主要勘探目的层.丽水西斜坡和分隔丽水东西次凹的灵峰低潜山构造带是该区最有利的两个区带,缓坡近凹构造是实现勘探突破的首选目标.文中指出了该区勘探的复杂性及相应的措施.

ANALYSIS OF HYDROCARBON POTENTIAL AND SELECTION OF EXPLORATION PROSPECT OF LISHUI AND JIAO-JIANG SAGS

It is believed that Lishui and Jiaojiang sags in Taibei depression possess the basic geological features of the rifting basins in the eastern China in the light of the analysis of the exploration work of Fourth round corporation. They will be the main exploration fields in the coming years for its high quality source rock of lower Plaeocene, abundant resources and various kinds of traps. Lishui sag in which good hydrocarbon shows have been encountered will be the most practical area to achieve the commercial discovery .and Jiaojiang sag with a lower ecploration degree is a reserve area. The main target zone is the lower oil-combination of Lower Plaeocene with the regional seals of Lingfeng Formation. The western slope of Lishui sag and Lingfeng lower burried-hill structure zone which separates east Lishui sub-sag and west Lishui sub-sag are the most promising zones. The structures adjacent sedimentary center in the western gentle slope are the most favorable prospects. The complex in this area for ecploration is also discussed in the paper.