天然气地球科学 ›› 2003, Vol. 14 ›› Issue (6): 443–447.doi: 10.11764/j.issn.1672-1926.2003.06.443

• 论著 • 上一篇    下一篇

龙门山北段前缘前陆盆地须二段―须三段含油气区带油气地质条件研究

韩应钧, 丁玉兰   

  1. 中油股份西南油气田分公司勘探开发研究院,四川 成都 610051
  • 收稿日期:2003-05-21 修回日期:2003-09-23 出版日期:2003-12-20 发布日期:2003-12-20
  • 作者简介:韩应钧(1950-),男,重庆市人,高级工程师,从事石油天然气勘探研究.

THE OIL AND GAS GEOLOGICAL CONDITION OF XUJIAHE FORMATIONSECOND-THIRD MEMBER IN THE NORTH SECTION OF LONGMENMOUNT FORELAND BASIN

HAN Ying-jun, DING Yu-lan   

  1. Research Institute of Exploration and Development, Southweast Oil and GasField Branch, PCL, Chengdu  610051, China
  • Received:2003-05-21 Revised:2003-09-23 Online:2003-12-20 Published:2003-12-20

摘要:

依据构造演化史、生烃史和微裂缝密度,将龙门山北段前缘前陆盆地须家河组二段―三段含油气区带划分为梓潼凹陷西斜坡含油气区、梓潼凹陷东斜坡含油气区和九龙山含油气区。梓潼凹陷西斜坡含油气区须二段-须三段发育有4套大型砂体。在诺尼克晚期的表生作用下,该区砂体生成粒内-粒间溶孔,其后由于中深埋藏作用而发育微张裂缝;在燕山期大型砂体与古隆起构成复合型圈闭并继承性捕获油气。

关键词: 叠置砂体, 溶孔, 微裂缝, 古圈闭

Abstract:

The petroleum province, oil and gas bearing area ,of the Xujiahe formation second-third member in the north section of Longmen mount foreland basin were divided into three  parts: the Zitong sag west slop petroleum province, the Zitong sag east slop petroleum province and  the Jiulongshan petroleum province on the basis of its tectonic evolution, hydrocarbon generation history, the kinds of pore and density of microcrack in Xujiahe formation second-third member's sand bodies. The Zitong sag west slop petroleum province: 1.The Xujiahe formation second-third member's four huge overriding sand bodies are generated by quick aggradation of sediment in early-medium Norian stage; 2.The fresh water leaching during epigenesis late Norian stage results in the intragranular-intergranuler solution pore generating in these sand bodies; 3. Subsequently, the microcrack in these sand bodies grows as a result of the geostatic pressure or dynamic pressure in medium-deep buried diagentic enviroment; 4. These sand bodies and the huge ancient uplift constitute a huge ancient compound trap, which catchs oil and gas all time.

Key words: Overriding sand bodies, Intragranular-intergranuler solution pore, Microcrack, Ancient compound trap.

中图分类号: 

  • TE122.2

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