松辽盆地长岭断陷无机成因CO<sub>2</sub>气成藏条件分析

李贶; 王果寿; 周卓明

doi:10.11781/sysydz201504439

松辽盆地长岭断陷无机成因CO₂气成藏条件分析

doi: 10.11781/sysydz201504439

中国石化石油勘探开发研究院无锡石油地质研究所, 江苏无锡 214126

基金项目: 中国石化东北油气分公司项目"松南长岭断陷无机成因气识别及分布规律研究"(G1200-08-WT-0439)资助。

详细信息

作者简介:
李贶(1980-),男,工程师,从事有机地球化学研究。E-mail:kuangli.syky@sinopec.com。

中图分类号: TE132.3
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出版历程
- 收稿日期: 2015-01-16
- 修回日期: 2015-06-03
- 刊出日期: 2015-07-28

Inorganic carbon dioxide gas reservoir formation in Changling Fault Depression, Songliao Basin

Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, China

摘要

摘要: 随着深层天然气勘探的进展,在松辽盆地长岭断陷的多个气田中发现了含量不等的CO₂气体。通过天然气的CO₂碳同位素值和³He/⁴He值,分析了长岭断陷CO₂气体的成因类型,认为长深2、长深4、长深6井区以及松南气田的CO₂气体为幔源无机成因为主,而东岭气田的CO₂气体为有机成因,这主要受控于断陷内的深大断裂的分布。盆地内地幔隆起导致地壳减薄而发育的低速高导岩浆房、长岭断陷深层"网状结构"的构造拆离带和基底深大断裂则是长岭断陷无机成因CO₂气藏形成的有利条件。
- 无机CO₂ /
- 碳同位素 /
- 深大断裂 /
- 岩浆活动 /
- 成藏条件 /
- 长岭断陷 /
- 松辽盆地
Abstract: With the development of deep gas exploration, some huge, enriched zones of CO₂ have been found in the Changling Fault Depression of the Songliao Basin. The origin of the CO₂ was analyzed for carbon isotope values of and the ³He/⁴He ratio was determined. The CO₂ gas in the Changshen2, 4, 6 well blocks and the Songnan gas field is mainly inorganic gas sourced from the mantle, while that in the Dongling gas field is organic gas. The type was controlled by the distribution of deep fractures in the fault depression. The low-speed and high-conductivity magma chambers resulted from crustal thinning during mantle uplift, the "mesh structure" tectonic detachment belt in the deep Changling Fault Depression and the deep and extensive faults on the basement are the advantageous conditions for the formation of inorganic CO₂ reservoirs.
- inorganic CO₂ /
- carbon isotope /
- deep and huge fault /
- magmatic activity /
- reservoir formation conditions /
- Changling Fault Depression /
- Songliao Basin

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参考文献(19)

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