鄂尔多斯盆地氦同位素的特征

鄂尔多斯盆地氦同位素的特征

戴金星1 2, 李剑2, 侯路3

1. 中国石油勘探开发研究院, 北京 100083; 2.中国石油勘探开发研究院廊坊分院, 河北廊坊, 065007; 3. 中国石油大学资源与信息学院, 北京 102200

收稿日期:2005-12-20 修回日期:2005-12-20 出版日期:2005-12-20 发布日期:2005-12-20

Characteristics of Helium Isotopes in the Ordos Basin

DAI din-xing1 2, LI dian2, HOU Lu3

1. Research Institute of Petroleum Exploration and Development, Beijing 100083, China; 2. Langfang Branch Research Institute of Petroleum Exploration and Development, Langfang 065007, Hefei, China; 3. Faculty of Natural Resources and Information Technology, China University of Petroleum, Beijin 102200, China

Received:2005-12-20 Revised:2005-12-20 Online:2005-12-20 Published:2005-12-20

摘要/Abstract

摘要： 鄂尔多斯盆地是中国最稳定的含油气盆地,也是我国发现1000×10^8m^3以上大气田最多的盆地。根据46个气样氦同位素分析,^3He／^4He为3．1×10^8～1．2×10^-7,平均为4．36×10^-8,R／Ra值为0．022～0．085,是壳源氦的特征。鄂尔多斯盆地^3He／^4He和R／Ra值不受天然气的成因类型、气的产状及气的原生性与后生改造的影响。R／Ra值定量说明鄂尔多斯盆地构造上极稳定。

Abstract: The Ordos Basin is a basin, which contains the largest amount of gas fields with proved geological reserves over 100 b m^3 in China. It is also the most stable craton petroliferous basin in China. According to the helium isotope analyses for 46 gas samples from the basin, the following results have been obtained： ^3He/^4He values, range from 3.1×10^8～1.2×10^-7, averaging 4.36×10^-8 ; R/Ra values, range from 0. 022 to 0. 085. These data show the character of crust-derived helium. The values of ^3He/^4He and R/Ra show no relation with the formation types, occurrence, autogenetic characteristics and catageneic changes of natural gases in the basin. The values of R/Ra quantitatively demonstrate the extremely stable structure of Ordos Basin.

戴金星 , 李剑, 侯路. 鄂尔多斯盆地氦同位素的特征[J]. J4.

DAI din-xing1 2, LI dian2, HOU Lu3. Characteristics of Helium Isotopes in the Ordos Basin[J]. J4.