摘要
通过对东营凹陷沙四段下亚段烃源岩和储层特征进行分析,并结合丰深1井沙四段下亚段凝析气藏的精细解剖,探讨东营凹陷深层凝析气藏的形成条件。研究结果表明,沙四段下亚段盐间发育的暗色泥岩为主要烃源岩,属于“自生自储”型气藏。东营凹陷北部控盆断层下降盘同期广泛发育的砂砾岩扇体和异常高压带,为油气聚集提供了良好的储层和有利的保存条件,扇体之上沉积的巨厚膏岩层是优质的盖层,同时,适当的温压条件且温压场的耦合,决定了该凝析气藏的形成和保存。
According to analyzing characteristics of source rock and reservoir in lower Es4 in Dongying Sag,and combining with precise investigation on condensate gas reservoir in lower Es4 of Fengshen 1 well,the author discussed the formation conditions and control factors for deep-seated condensate gas reservoir in Dongying Sag.The result shows that dark mudstone of lower Es4 is the main source rock and the gas reservoir belongs to source and reservoir in the same bed.The synchronous glutinite body and the abnormal high-pressure zone,which occur in downthrow block of the major faults in the north of Dongying Sag,provide favorable conditions for petroleum accumulation and preservation.The thick evaporites on the glutinite body are the best caprock.The formation and preservation of the condensate gas reservoir attribute to the appropriate pressure and temperature conditions.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2007年第3期55-57,共3页
Petroleum Geology and Recovery Efficiency
关键词
深层
凝析气藏
砂砾岩体
膏盐岩
异常高压
东营凹陷
deep-seated,(Condensate gas reservoir,glutenite body,abnormal high-pressure,Dongying Sag
