中国主要含油气盆地区域地球化学场参数特征及其成因研究  

Features and genesis of regional geochemical fields of the main hydrocarbon-bearing basins in China.

作　　者：汤玉平[1] 丁相玉[1] 吴向华[1] 魏巍[1] 李尚刚[1] 

机构地区：[1]中国石化石油勘探开发研究院石油化探研究所

出　　处：《石油勘探与开发》2001年第3期1-4,共4页Petroleum Exploration and Development

摘　　要：统计分析了我国 1 4个主要含油气盆地或地区的主要油气化探指标及变异特征 ,对其成因进行了讨论 ,提出了主要含油气盆地区域地球化学场划分准则。认为我国自西向东地球化学背景场渐渐降低 (西部盆地为高区域背景场 ,中、东部和近海盆地为中等区域背景场 ,东北部盆地为低区域背景场 ) ;变异性不断增高 (酸解烃的变异系数 :塔里木盆地北部为 0 .2 1～ 0 .40 ,中、东部盆地为 0 .3 7～ 1 .2 ,松辽盆地南部为 1 .1 1～ 3 .5 0 ) ;烃类湿度系数呈现西干东湿的变化趋势。主要含油气盆地地球化学场与地热梯度具有明显的相关性 ,揭示了两者间的成因关系。图The key geochemical prospecting indicators of 14 main hydrocarbon bearing basins and their various characteristics have been analyzed statistically, and the genesis and variation of the indicators have been discussed. Based on this, a criterion has been proposed to classify the regional geochemical field of the main hydrocarbon bearing basins in China. A variation trend has been pointed out in this paper that the geochemical background field descends gradually (i.e. high background field exists in the basins of the West, medium background field in the basins of the Central, the East and the offshore basins and low background field in the basins of the Northeast); while the indicator variability increases constantly from west to east (e.g. the variation coefficient of acidolyzed hydrocarbon ranging from 0.21 to 0.40 in the north of Tarim basin, 0.37 to 1.2 in the central and eastern basins and 1.11 to 3.50 in the south of Songliao basin) with the lower humidity coefficient of hydrocarbons in the west and the higher humidity coefficient in the east. Geochemical field of the main hydrocarbon bearing basins in China obviously relates to geothermal gradient, which reveals the relatives between them genetically.

关 键 词：中国 含油气盆地 区域地球化学场 参数特征 成因 

分 类 号：P618.130.2[天文地球—矿床学] TE12[天文地球—地质学]