天然气地球科学

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沿断裂运移油气向两侧砂体发生侧向分流的判识方法

付广,张博为,历娜,王浩然   

  1. (东北石油大学,黑龙江 大庆 163318)
  • 收稿日期:2015-04-24 修回日期:2015-07-07 出版日期:2016-02-10 发布日期:2016-02-10
  • 作者简介:付广(1962),男,辽宁新宾人,教授,主要从事油气藏形成与保存研究. Email:fuguang2008@126.com.
  • 基金资助:

    国家自然科学基金项目“油源断裂转换带优势输导运移油气条件研究”(编号:41372153)资助.

Discussion on judging method of oilgas migration along fault or along sandbodies on both sides with lateral division migration

Fu Guang,Zhang Bowei,Li Na,Wang Haoran   

  1. (Northeast Petroleum University,Daqing 163318,China)
  • Received:2015-04-24 Revised:2015-07-07 Online:2016-02-10 Published:2016-02-10

摘要:

为了研究含油气盆地下生上储式生储盖组合中油气分布规律,在沿断裂运移油气向两侧砂体发生侧向分流运移机制及条件研究的基础上,通过比较断裂填充物和两侧砂体排替压力的相对大小,探讨了一套沿断裂运移油气是否向两侧砂体发生侧向分流运移的判识方法,并将其应用于南堡凹陷5个典型区块沿7条输导断裂运移油气是否在东营组向62个砂层发生侧向分流运移的判别中。结果表明:东营组62个砂层中有43个砂层的排替压力小于断裂填充物的排替压力,油气向砂层发生侧向分流运移;有19个砂层的排替压力大于断裂填充物的排替压力,油气仍沿断裂向上运移,这与目前油气钻探所揭示的油气分布结果相吻合。表明该方法用于判别沿断裂向上运移油气是否向两侧砂体发生侧向分流运移是可行的。

关键词: 断裂, 油气, 砂体, 分流运移, 判识方法, 南堡凹陷, 东营组

Abstract:

To study oilgas distribution law of the lower generation and upper accumulation source rockreservoircaprock pattern in oilgasbearing basin,based on the study of condition and mechanism of oilgas migration along fault or along sandbodies on both sides with lateral division migration,by comparing the relative size of the displacement pressure in fault filler and sandbodies on both sides,this study discussed a set of judging method of oilgas migration along fault or along sandbodies on both sides with lateral division migration,and applied it to the discrimination of whether oilgas migrates along 7 faults or along 62 sand layers on both sides with lateral diversion migration in Dongying Formation of 5 Nanpu Depression typical blocks.The result indicated that,in 62 sand layers of Dongying Formation,the displacement pressure of 43 sand layers was less than that of fault filler,oilgas migrated into sand layers with lateral diversion migration;the displacement pressure of 19 sand layers was larger than that of fault filler,so oilgas migrated upward along fault,which was coincident with current result of oilgas drilling revealing the distribution of oilgas.It indicates that the method is feasible to be applied in discrimination of whether oilgas migrated upward along faults or along sandbodies on both sides with lateral division migration.

Key words: Fault, Oilgas, Sandbodies, Division migration, Discrimination method, Nanpu Sag, Dongying Formation

中图分类号: 

  • TE122.2+2

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