摘要
世界上许多含油气盆地深层油气藏的形成都与膏盐层有关。针对膏盐层的空间展布及其与油气成藏条件的关系,探讨了济阳坳陷渤南洼陷深层膏盐层对油气运聚的影响。认为:渤南洼陷的膏盐层主要发育在洼陷中心部位,并向南、北依次减薄;膏盐层不仅可作盖层,同时也可储集油气,在膏盐层发育层段,次生孔隙相对发育;膏盐层常伴生异常高压,压力系数高达1.73;膏盐间成藏和膏盐下成藏是该区两种主要的与膏盐层有关的油气成藏模式,发育在膏盐层之下的油气藏数量相对较多,是今后深层油气勘探的重点。
A study on the distribution of Paleogene evaporates and their relationship with hydrocarbon accumulation in deep Bonan Sub-sag indicates that; (1) the evaporates are the thickest at the center and thin out to the south and north; (2) the evaporates can serve as seal on top as well as reservoirs when secondary porosity develops within evaporates; ( 3 ) overpressure may closely associate with evaporates and the pressure coefficient may reach as high as 1. 73 in certain areas; (4) sub-evaporate and evaporate are two major types of reservoirs in the Bonan Sub-sag and therefore greater attention should be paid to the sub-evaporate reservoirs in future exploration.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2003年第5期24-27,共4页
Petroleum Exploration and Development
关键词
渤南洼陷
深层
膏盐层
油气藏
Bonan Sub-sag
deep zone
evaporate formation
hydrocarbon pool
