Controlling effect of tectonic uplift on helium enrichment in the northern margin of Q aidam Basin

Tao Gang; Qin Shengfei; Qi Wen; Li Bo; Zhou Fei; Lei Tao; Wang Duo

doi:10.7623/syxb202503013

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Controlling effect of tectonic uplift on helium enrichment in the northern margin of Q aidam Basin

更新时间：2025-12-03

- Controlling effect of tectonic uplift on helium enrichment in the northern margin of Q aidam Basin
- ACTA PETROLEI SINICA Vol. 46, Issue 3, Pages: 649-660(2025)
- 作者机构：
  
  1. 中国石油勘探开发研究院西北分院,甘肃,兰州,730020
  2. 中国石油勘探开发研究院,北京,100083
  3. 中国石油青海油田公司甘肃敦煌,736202
- 作者简介：
- 基金信息：
- DOI：10.7623/syxb202503013
  CLC： TE132.3
- Published Online：03 April 2025，
  
  Published：2025
- 稿件说明：
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陶刚, 秦胜飞, 齐雯, 李博, 周飞, 雷涛, 王铎. 构造抬升对柴达木盆地北缘氦气富集的控制作用[J]. 石油学报, 2025, 46(3): 649-660.

Tao Gang, Qin Shengfei, Qi Wen, et al. Controlling effect of tectonic uplift on helium enrichment in the northern margin of Q aidam Basin[J]. ACTA PETROLEI SINICA, 2025, 46(3): 649-660.
陶刚, 秦胜飞, 齐雯, 李博, 周飞, 雷涛, 王铎. 构造抬升对柴达木盆地北缘氦气富集的控制作用[J]. 石油学报, 2025, 46(3): 649-660. DOI： 10.7623/syxb202503013.

Tao Gang, Qin Shengfei, Qi Wen, et al. Controlling effect of tectonic uplift on helium enrichment in the northern margin of Q aidam Basin[J]. ACTA PETROLEI SINICA, 2025, 46(3): 649-660. DOI： 10.7623/syxb202503013.

摘要

柴达木盆地北缘(柴北缘)地区发现了东坪气田和马北气田等富氦气田

其氦气成因和来源尽管有初步探讨

但氦气分布特征及富集机理的研究还比较薄弱。基于对柴北缘地区的系统采样及天然气样品组分和同位素测试

结合研究区的基底分布和构造特征等地质背景资料

总结了柴北缘地区富氦气藏的分布特征

深度剖析了富氦气藏与贫氦气藏的地质背景差异。研究结果表明:在柴北缘地区目前的在产气田中

东坪气田、尖北气田和马北气田的氦气平均含量大于0.1%

为富氦气田;牛东气田、昆特依气田和南八仙气田为贫氦气田。柴北缘地区富氦气田具有坐落在古老花岗岩基底之上、分布在深大断裂附近、气藏边底水活跃、经历了喜马拉雅期大幅度构造抬升和气藏的含气丰度较低等特征。构造抬升对柴北缘地区的氦气富集的控制作用表现在:①构造抬升作用形成的断裂系统为氦气的运移提供了高效通道;②构造抬升作用为深部含氦地质流体的向上运移提供了动力;③构造抬升作用为氦气沿古老储层横向运移并不断富集创造了条件。

Abstract

Helium-rich fields such as Dongping gas field and Mabei gas field have been found in the northern margin of Qaidam Basin. Although the origin and source of helium have been discussed

the studies on the distribution characteristics and enrichment mechanism of helium are still relatively weak. Based on the systematical sampling of natural gas in the study area for component testing

in combination with the geological backgrounds such as basement distribution and tectonic features

this paper summarizes the distribution characteristics of helium-rich gas reservoirs in the northern margin of Qaidam Basin

and deeply analyzes the differences in geological backgrounds between helium-rich and helium-poor reservoirs. The results show that among the gas fields in production in the northern margin of Qaidam Basin

Dongping

Jianbei and Mabei gas fields are rich in helium

with the average helium content greater than 0.1 %

while Niudong

Kunteyi and Nanbaxian gas fields are helium-poor. In the study area

the helium-rich gas field is characterized by being situated on the top of an ancient granite basement

distributed near deep and large faults

boasting of active edge and bottom water

experiencing a large tectonic uplift during the Himalaya orogeny period

and having a low gas abundance in the gas reservoir. The controlling effects of tectonic uplift on helium enrichment in the northern margin of Qaidam Basin are as follows. (1)The fault system formed by tectonic uplifting provides an efficient channel for helium migration. (2)Tectonic uplift provides a driving force for the upward migration of deep helium-bearing geologic fluids. (3)Tectonic uplift creates the conditions for the transverse migration and continuous accumulation of helium along the old reservoirs.

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references

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