摘要
黄骅坳陷风化店中生界火山岩油藏的岩石类型主要为粗面英安岩、粗面岩及少量英安岩和粗面安山岩。火山岩可分为火山喷发相 (包括火山爆发亚相和火山溢流亚相 )及火山沉积相两个岩相带。位于不同岩相带的储层其储集物性不同 ,火山爆发亚相是最有利的储集层段。火山岩所处的古地貌位置对其储集性也有较大的影响 ,位于古构造高部位及转折部位的火山溢流亚相熔岩的上部是理想的油气储集层段。有机地化研究显示 ,火山岩原油样品与孔店组二、三段泥岩抽提物的TIC图谱和饱和烃图谱十分相似 ,原油甾烷和藿烷也与孔店组二段泥岩抽提物相似 ,因此 ,沧东坳陷中的烃源岩及火山岩上覆地层下第三系孔店组二段泥页岩为火山岩油藏的主要烃源岩。
The Mesozoic volcanic rocks in Fenghuadian, Huanghua depression ,mainly consist of rhyolites,trachydacites, trachytes and minor trachyandesites and dacites. Two lithofacies, volcanic explosion (including explosion and effusion subfacies) and volcaniclastic lithofacies can be distinguished. Reservoir in different lithofacies are characterized with different reservoirs physical properties, the volcanic explosion subfacies are the most favorable reservoirs. Different locations of volcanic rock in terms of palaeo-geomorphology have a great impact on the reservoir quality. Upper portion of the lava of the volcanic effusion subfacies in the highland of palaeo-geomorphology and in the hinge area are believed to be ideal oil and gas reservoirs. It is indicated by organic geo-chemical researches that source rock samples gathered from the volcanic rocks are quite similar to TIC chromatograph of mudstone extracts and saturated hydrocarbon chromatograph from Member II,III of Kongdian Formation, sterane and hopane of crude oil also have similarities with mudstone from Member II of Kongdian Formation, therefore, the Eocene Member II (E K 2 )of Kongdian Formation overlain the Suite and in Cangdong depression is the principal source rocks for generation of hydrocarbons reserved in Fenghuadian suite.The faults in the suite may have acted as conduits for hydrocarbon migration.
出处
《石油与天然气地质》
EI
CAS
CSCD
北大核心
2002年第4期357-360,共4页
Oil & Gas Geology
基金
国家自然科学基金 (批准号:40 172 0 5 5 )资助项目成果
关键词
风化店
中生界
火山岩油藏
特征
油源
油气运移
Fernghuadian
volcanic pool
lithofacies
hydrocarbons
provenace
migration
