新疆石油地质 ›› 2009, Vol. 30 ›› Issue (2): 201-204.

• 油气勘探 • 上一篇    下一篇

库车坳陷克拉苏构造带膏盐岩对油气成藏的影响

杨宪彰, 雷刚林, 张国伟, 赵丹阳   

  1. 中国石油 塔里木油田分公司,新疆 库尔勒 841000
  • 收稿日期:2008-07-29 出版日期:2009-04-01 发布日期:2020-08-25
  • 作者简介:杨宪彰(1979-),男,甘肃镇原人,工程师,硕士,石油地质, (Tel)0996-2172135(E-mail)yangxianzhang@163.com.

Effect of Gypsum-Salt Rocks on Hydrocarbon Accumulation in Kelasu Structural Belt of Kuqa Depression

YANG Xian-zhang, LEI Gang-lin, ZHANG Guo-wei, ZHAO Dan-yang   

  1. Tarim Oilfield Company, PetroChina, Korla, Xinjiang 841000, China
  • Received:2008-07-29 Online:2009-04-01 Published:2020-08-25

摘要: 对库车坳陷克拉苏构造带膏盐岩特征研究后指出,古近系膏盐岩对该区油气成藏具有重要影响:一是区域分布的巨厚膏盐岩为盐下圈闭提供了优质盖层;二是膏盐岩密度小、热导率高、隔热性差、塑性流动性强,能够有效释放侧向挤压应力等特性,有利于深层储集层保持较好物性,使盐下超深层圈闭成为现实勘探目标;三是膏盐层塑性流动性避免了构造挤压对盐下构造圈闭的破坏作用,大型圈闭得以保存,膏盐层聚集区与大型构造圈闭互为依存。精细研究刻画该区膏盐层空间展布、岩石物理特征对于扩大该区油气勘探成果具有重要意义。

关键词: 塔里木盆地, 库车坳陷, 克拉苏构造带, 膏盐岩层, 盖层, 储集层, 构造圈闭

Abstract: The study shows that the Paleogene gypsum-salt rocks of Kelasu structural belt in Kuqa depression has a significant effect on hydrocarbon accumulation in this area: 1)the regional distributing thick gypsum-salt rocks could provide premium conditions for subsalt trapping; 2)the petrophysical property of the rocks, such as low density, high thermal conductivity, poor insulation, strong plastic flow and effectively releasing lateral squeeze stress, is favorable for protection of the deep reservoir's porosity and permeability; 3)the strong plastic flow prevents from damages of tectonic compression to subsalt structural traps, and helps preservation of large traps and dependence of gypsum-salt zone on the traps. The result shows that in-depth study of the spatial distribution and petrophysical property is of great significance for further petroleum exploration in this area.

Key words: Tarim basin, Kuqa depression, Kelasu structural belt, gypsum-salt rock, cap rock, reservoir, structural trap

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