摘要
对川西地区地球化学场的参数特征、丰度场特征、变异性特征、结构特征等进行了研究和解剖,用统计参数和图式表现了区域地球化学场的特征和变化。甲烷、重烃的丰度系数(K值)在川西地区的北部最高,南部最低,而ΔC的K值系数具有从东往西渐减的南北分区特征,Hg的K值则呈明显的东西分带性。变异性分析(Cv)结果显示了川西地区为非均匀地球化学场,干燥系数(C1/C2+)和琼斯图解分析均显示了以含气为主的地球化学场特征。这些特征是地质构造运动、烃类微渗漏、地球化学作用等相互交织影响的综合效应表现。
This paper analyzes the parameter characteristics of the geochemical field,characteristics of the abundance field,variability characteristics and constructional characteristics in the western Sichuan region and shows the characteristics and variation of the regional geochemical field with statistical parameters or diagrams.The K values of methane and heavy hydrocarbon are the highest in the northern part of the western Sichuan region and the lowest in the southern part,while the abundance coefficient of ΔC shows the features of north-south division due to gradual decrease from east to west and the K values of Hg show distinct east-west zoning.The variability analysis(Cv )shows that the western Sichuan region is an inhomogeneous geochemical field.The dryness coefficient (C 1 /C 2 +)and Jothers diagram both show the characteristics of gas-dominated geochemical field.These characteristics are manifestations of combined ef-fects of the mutual influences of the tectonic movements slight leakage of hydrocarbons and geochemical processes.
出处
《地质通报》
CAS
CSCD
北大核心
2003年第4期290-294,共5页
Geological Bulletin of China
基金
中国新星石油公司科技攻关项目资助。
关键词
地球化学场
参数特征
指标丰度特征
变异性特征
结构特征
川西油气田
geochemical field
parameter feature
index abundance
index distribution
constructional characteristics
variability characteristics
the western Sichuan oil-gas field
