土壤气中He、Ar组分在金家地区油气化探中应用研究  

THE STUDY OF HELIUM AND ARGON IN SOIL GASES IN JINJIA AREA FOR OIL-GAS EXPLORATION

作　　者：朱铭[1] 霍卫国[1] 张福松[1] 马志邦[1] 廖永胜[1] 许卫平[1] 

机构地区：[1]中国科学院地质研究所,中国石油天然气总公司胜利石油管理局

出　　处：《地质科学》1995年第3期302-312,共11页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：国家自然科学基金;中国科学院资环局资助

摘　　要：对济阳凹陷南缘与鲁西隆起接合部开展了土壤气Ｈｅ、Ａｒ组分及Ａｒ同位素测定，结果表明Ｈｅ的丰度从５．１—６μＬ／Ｌ（Ｓ．Ｔ．Ｐ），δＨｅ值从－４％－１６％，平均２．５９％；４０Ａｒ／３６Ａｒ比值从２５５—３２５，δ（４０Ａｒ／３６Ａｒ）值从＋１１％－１１％，Ｈｅ异常主要分布在研究区北部，而Ａｒ等值图分布比较复杂。Ｈｅ、Ａｒ、烃三组分之间的组合关系表明有３个远景区，最有意义的是中深层远景区。此外，根据地质分析及Ａｒ同位素特征表明中深层异常远景区不仅是与已知的第三系油田有关，而且还与深部Ｃ—Ｐ煤系地层有关，故属煤成气异常。sing helium techaique to find oil-gas pool has been applited for several years.Recently, the authors have just developed a new technique-combination of heliumand argon for oil-gas exploration.The result shows that the abundance of He is 5.1-6 μL/L(S.T.P),δ He is from-4% to 16%, average is 2.59%; tEe values of,40Ar/36Ar in soil gas are 255-325, thevalue of δ (40Ar/36Ar) is from +11 %-11%, average is-0.50%. The research suggests that the anomaly of δHe is related to oil-gas pool, but tEe anomaly of δ(40Ar/36Ar) is rather complex. For negative value of 6 (40Ar/36Ar) the more negative it is.the more it is riched in 36Ar, and the more argon is fractionated. As the cap rockabove oil-gas pool is usually cemented by CaCO3, the channel is getting worse with.increasing argon fractionation. That is why tEe negat ive values of δ (40Ar/36Ar) always occur above oil-gas pool.The authors discover that there are eight patterns among He, Ar and hydrocarbon. Different patterns have different significance for oil-gas estimation. According'to their re lationship with each oiLer three kinds of prospect for oil-gas explorationhave been estimated, but the mid-deep gas prospect area is the best.

关 键 词：石油 天然气 地球化学勘探 土壤气 氦 氩 

分 类 号：P618.130.8[天文地球—矿床学]