源外鼻状构造区油运移输导通道及对成藏的作用
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本文为国家973重点基础研究项目(编号 2001CB209104)的成果。


An example of Shangjia region in the Songliao basin
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    摘要:

    尚家地区为一鼻状构造,位于三肇凹陷下白垩统青山口组一段油源区之外,其石油的成藏与分布主要受输导通道的控制。能否正确认识该区石油输导通道及对成藏的作用,对于指导该区石油勘探和丰富油气成藏理论均具重要意义。采用油源对比、典型油藏解剖和成藏模式的研究方法,对尚家地区石油输导过程进行了研究,将其划分为以下3个部分:① T2源断裂是三肇凹陷青山口组一段源岩生成石油向下伏下白垩统泉头组四段扶余油层、下白垩统泉头组三段杨大城子油层“倒灌”运移的输导通道;② 被T2—T2-2断裂沟通的砂体是扶余、杨大城子油层石油从三肇凹陷向尚家地区侧向运移的输导通道;③ T2—T1-1断裂是尚家地区扶余、杨大城子油层石油向上覆下白垩统姚家组葡萄花油层运移的输导通道。采用石油输导通道和石油分布之间匹配关系的研究方法,对尚家地区输导通道对石油成藏与分布中的作用进行了研究,得到T2源断裂越发育,三肇凹陷向尚家地区侧向运移的油源越充足;被T2—T2-2断裂沟通的砂体输导通道位置和能力控制着扶余、杨大城子油层和下白垩统泉头组二段石油的分布及富集程度;T2—T1-1断裂输导通道分布控制着尚家地区葡萄花油层的石油富集区域。

    Abstract:

    Shangjia region is a nose structure. It is located outside of the oil area of K1qn1(1st Member, Qingshankou Formation, Lower Cretaceous) in the Sanzhao sag, Songliao Basin. In this region oil accumulation and distribution are controlled by transporting pathway. Transporting pathways of oil and its controlling to oil accumulation and distribution in the region can or not be recognized, it is of important significance to point oil exploration and to abundance oil—gas accumulation theory. Using the method of oil source correlation, typical oil reservoirs anatomy and oil accumulation models, oil transporting process in Shangjia region was studied. It is classified into 3 parts:T2 faults connecting sourcerock were transporting pathways for migration downward of oil from K1qn1 source rocks into Fuyu, Yangdachengzi oil layers in Sanzhao sag. Sand bodies connecting by T2—T2-2 faults were transporting pathways for oil in Fuyu, Yangdachengzi oil layers migrating laterally from Sanzhao sag to Shangjia region. T2—T1-1 faults were transporting pathways for oil in Fuyu, Yangdachengzi oil layer migrating to Putaohua oil layers in Shangjia region . Using the method studying the relation between oil transporting pathways and oil distribution, controlling of transporting pathways to oil accumulation and distribution was studied, it was concluded that the more developed the faults were, the more sufficient the oil source for lateral migration from Sanzhao sag to Shangjia region was. The position and ability of transporting pathways which were sand bodies connected by T2—T1-1 faults controlled the distribution and abundant degree of oil in Fuyu, Yangdachengzi oil layers and K1q2. The distribution of T2—T1-1 faults transporting pathways controlled the abundant area of Putaohua oil layers in Shangjia area.

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付广,王有功.2008.源外鼻状构造区油运移输导通道及对成藏的作用[J].地质论评,54(5):646-652,[DOI].
.2008. An example of Shangjia region in the Songliao basin[J]. Geological Review,54(5):646-652.

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  • 收稿日期:2008-04-06
  • 最后修改日期:2008-07-27
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