石油与天然气地质 ›› 2002, Vol. 23 ›› Issue (4): 357-360.doi: 10.11743/ogg20020411

• 油气空间 • 上一篇    下一篇

风化店中生界火山岩油藏特征及油源

罗静兰, 张成立   

  1. 西北大学大陆动力学教育部重点实验室, 西北大学地质系, 陕西西安, 710069
  • 收稿日期:2002-09-05 出版日期:2002-12-25 发布日期:2012-01-16
  • 基金资助:

    国家自然科学基金(批准号:40172055)资助项目成果

CHARACTERISTICS AND OIL SOURCE FOR MESOZOIC VOLCANIC POOLS IN FENGHUADIAN REGION

Luo Jinglan, Zhang Chengli   

  1. The Key Laboratory of Continental Dynamics, the Ministry of Education, Department of Geology, Northwest University, Xi'an
  • Received:2002-09-05 Online:2002-12-25 Published:2012-01-16

PDF (PC)

612

被引次数

21

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。断裂为油气的运移起了输导作用。

关键词: 风化店, 火山岩油藏, 岩相与油气, 油气的来源与运移

Abstract:

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(EK2)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.

Key words: Fernghuadian, volcanic pool, lithofacies, hydrocarbons, provenace, migration

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