自生伊利石K-Ar、Ar-Ar测年技术对比与应用前景展望——以苏里格气田为例

doi:10.7623/syxb201403001

石油学报 ›› 2014, Vol. 35 ›› Issue (3): 407-416.DOI: 10.7623/syxb201403001

• 地质勘探 • 下一篇

自生伊利石K-Ar、Ar-Ar测年技术对比与应用前景展望——以苏里格气田为例

张有瑜^1,2,3, Horst Zwingmann⁴, 刘可禹^1,2,3,4, 罗修泉¹

1. 中国石油勘探开发研究院北京 100083;
2. 中国石油天然气集团公司盆地构造与油气成藏重点实验室北京 100083;
3. 提高石油采收率国家重点实验室北京 100083;
4. Earth Science and Resource Engineering, Commonwealth Scientific and Industrial Research Organization Bentley, Australia P.O.Box 1130

收稿日期:2013-12-07 修回日期:2014-03-12 出版日期:2014-05-25 发布日期:2014-04-11
通讯作者: 张有瑜，男，1955年8月生，1982年获中南大学学士学位，1988年获中国地质大学（北京）硕士学位，现为中国石油勘探开发研究院教授级高级工程师，主要从事油气储层自生伊利石K-Ar、Ar-Ar测年、He、Ar同位素质谱分析、常规K-Ar、Ar-Ar测年和含油气盆地黏土矿物研究。Email：ngms@petrochina.com.cn
作者简介:张有瑜，男，1955年8月生，1982年获中南大学学士学位，1988年获中国地质大学（北京）硕士学位，现为中国石油勘探开发研究院教授级高级工程师，主要从事油气储层自生伊利石K-Ar、Ar-Ar测年、He、Ar同位素质谱分析、常规K-Ar、Ar-Ar测年和含油气盆地黏土矿物研究。Email：ngms@petrochina.com.cn
基金资助:
中国石油天然气股份有限公司科技攻关项目“油气勘探新领域、新理论、新方法、新技术”（2011A-0207）资助。

Perspective on the K/Ar and Ar/Ar geochronology of authigenic illites：a case study from the Sulige gas field, Ordos Basin, China

Zhang Youyu^1,2,3, Horst Zwingmann⁴, Liu Keyu^1,2,3,4, Luo Xiuquan¹

1. PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China;
2. CNPC Key Laboratory of Basin Structure and Hydrocarbon Accumulation, Beijing 100083, China;
3. State Key Laboratory of Enhanced Oil Recovery, Beijing 100083, China;
4. Earth Science and Resource Engineering, Commonwealth Scientific and Industrial Research Organization, Bentley, P.O. Box 1130, Australia

Received:2013-12-07 Revised:2014-03-12 Online:2014-05-25 Published:2014-04-11

摘要/Abstract

摘要：

以苏里格气田为例，对自生伊利石K-Ar法、Ar-Ar法年龄测定的技术特点、应用效果和应用前景进行了系统对比和深入研究。苏里格气田自生伊利石（I/S有序间层）发育较好，主要呈丝状，具有典型的自生成因特征，其K-Ar年龄、未真空封装Ar-Ar总气体年龄和真空封装Ar-Ar总气体年龄分别为141~145 Ma、171~237 Ma和130~152 Ma。K-Ar年龄表明主要为晚侏罗世晚期―早白垩世早期成藏，其分布规律很好地反映了成藏特征和成藏过程；未真空封装Ar-Ar总气体年龄明显偏老，不能代表自生伊利石的形成年龄，更不能反映成藏时代，“³⁹Ar核反冲丢失”现象是导致其偏老的主要原因；真空封装Ar-Ar总气体年龄与K-Ar年龄基本接近，可能反映自生伊利石的形成年龄并代表成藏时代。本次对比研究表明，对于利用自生伊利石同位素测年技术探讨砂岩油气藏成藏时代，K-Ar法测年技术简便快捷、经济成熟、稳定可靠，是第一选择并具有较好的应用前景；未真空封装Ar-Ar法测年技术很难获得理想的年龄数据和较好的应用效果，如果没有其他特殊目的，可以不予考虑；真空封装Ar-Ar法测年技术，如果运用得当，有可能获得相对较好的年龄数据和相对较好的应用效果，但技术复杂、环节多、周期长和费用高等将会严重制约其发展和应用。

关键词: 苏里格气田, 下石盒子组八段砂岩储层, 自生伊利石, K-Ar测年, 未真空封装Ar-Ar测年, 真空封装Ar-Ar测年, ³⁹Ar核反冲丢失, 成藏年代

Abstract:

This paper makes a systematic comparison of and a deep study on the technical features, application prospective and effects of the K-Ar, vacuum-encapsulated Ar-Ar, and non-encapsulated Ar-Ar dating of authigenic illites from petroleum reservoirs by taking the Sulige gas field as an example. Authigenic illite, or the ordered mixed-layer illite/smectite (I/S) is well developed in reservoirs of the Sulige gas field. It is mainly presented in filamentous form, with typical authigenic origin. The corresponding K-Ar ages, vacuum-encapsulated Ar-Ar total gas ages, and non-encapsulated Ar-Ar total gas ages are 141-145 Ma, 130-152 Ma, and 171-237 Ma, respectively. The K-Ar ages indicate that the hydrocarbon accumulations mainly occurred during the period from the late phase of the Late Jurassic to the early phase of the Early Cretaceous, reflecting the accumulation features and processes by their distributions. The non-encapsulated Ar-Ar total gas ages are older due to ³⁹Ar recoil loss, and can't represent the forming ages of authigenic illites, or the accumulation times, both of which may be represented by the vacuum-encapsulated Ar-Ar total gas ages that are basically close to the K-Ar ages. The comparative results show that the K-Ar isotopic dating of authigenic illites is most applicable to exploring the hydrocarbon accumulation time in sandstone, with the advantages of easy-operation, low-cost, celerity and reliability, and better application prospect. The non-encapsulated Ar-Ar dating method will not be adopted unless for some special purposes, due to the difficulties in obtaining desirable age data and achieving good application prospect. The vacuum-encapsulated Ar-Ar dating method may yield reasonable age data if performed properly. However, the complex technical procedures, long analytical duration and high cost present a huge challenge for its development and routine application in studying petroleum reservoir chronology.

Key words: Sulige gas field, sandstone reservoirs of Member 8 of Xiashihezi Formation, authigenic illites, K-Ar dating, vacuum-encapsulated Ar-Ar dating, non-encapsulated Ar-Ar dating, ³⁹Ar recoil loss, accumulation time

中图分类号:

TE122.14

张有瑜, Horst Zwingmann, 刘可禹, 罗修泉. 自生伊利石K-Ar、Ar-Ar测年技术对比与应用前景展望——以苏里格气田为例[J]. 石油学报, 2014, 35(3): 407-416.

Zhang Youyu, Horst Zwingmann, Liu Keyu, Luo Xiuquan. Perspective on the K/Ar and Ar/Ar geochronology of authigenic illites：a case study from the Sulige gas field, Ordos Basin, China[J]. ACTA PETROLEI SINICA, 2014, 35(3): 407-416.

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自生伊利石K-Ar、Ar-Ar测年技术对比与应用前景展望——以苏里格气田为例

Perspective on the K/Ar and Ar/Ar geochronology of authigenic illites：a case study from the Sulige gas field, Ordos Basin, China

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