期刊文献+

川西地区浅、中层天然气藏化探判别模型 预览 被引量:6

Discriminant model of geochemical prospecting for shallow and Medium depth gas reservoirs in western Sichuan
在线阅读 下载PDF
分享 导出
摘要 川西地区上沙溪庙组储层的物上气甲烷、丙烷、重烃,酸解烃甲烷、丙烷、重烃,荧光320 nm和360 nm等浓度指标及物上气湿度系数、物上气丙烷/甲烷、酸解烃湿度系数、酸解烃丙烷/甲烷、荧光360 nm/320 nm、荧光405 nm/320 nm等比值指标均明显高于蓬莱镇组储层,具有显著的浓度降或浓度正向梯度,确实存在烃类的垂向微运移.上沙溪庙组储层天然气三维荧光图谱具有明显的T2峰,峰型相对复杂,与蓬莱镇组储层具有显著的差异性.聚类、模糊聚类、因子分析、非线性映射和对应分析等可以很好地将蓬莱镇组、上沙溪庙组储层划分为两大类,反映了蓬莱镇组和上沙溪庙组储层具有良好的自然分群特征及可判别性.依据费歇尔准则建立的判别模型表明,物上气甲烷作用最大,反映了物上气在井中化探判别天然气储层中的重要作用. For the Shaximiao Formation reservoirs in western Sichuan, both the concentration indexes (such as the /nethane, propane and heavy hydrocarbon of headspace analysis, the methane, propane and heavy hydrocarbon of acidolysis- hydrocarbon analysis, and the fluorescence 320 nm and 360 nm ) and the ratio indexes ( such as headspace humidity coefficient, headspace propane/methane, acidolysis hydrocarbon humidity coefficient, acidolysis hydrocarbon propane/methane, and fluorescence 360 nm/320 nm and 405 nm/320 nm ) , are obviously higher than that in Penglaizhen Formation reservoirs. Decrease or positive gradient of hydrocarbon concentrations are noticeable, suggesting that hydrocarbon vertical micro-migration do occur. The 3D fluorescence spectrum of natural gas in Shaximiao Fm reservoirs has apparent T2 peak, the pattern of which is relatively complex and is remarkably different with that in Penglaizhen Fm reservoirs. Based on graph theory, fuzzy cluster, factor analysis, nonlinear mapping and correspondence analysis, the reservoir rocks in Penglaizhen and Shaximiao Formations can be divided into two types. They have a good natural grouping features and identifiabiliity. Discriminant model built on Fisher Criteria demonstrates that the function of headspace methane is the largest, indicating that headspace methane is very important in identifying gas reservoirs in the well by geochemical prospecting.
作者 汤玉平 刘运黎 赵耀伟 陈银节 陈浙春 Shang YuPing;Liu YunLi;Zhao YaoWei;Chen YinJie;Chen ZheChun
出处 《石油与天然气地质》 EI CAS CSCD 北大核心 2005年第4期 530-536,共7页 Oil & Gas Geology
基金 中国新星石油公司资助项目
关键词 油气化探 判别模型 川西地区 oil and gas geochemical prospecting discriminant model western Sichuan
作者简介 汤玉平,男,44岁,教授级高级工程师,石油地质和油气化探
  • 相关文献

参考文献8

二级参考文献36

共引文献78

同被引文献123

引证文献6

二级引证文献28

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部 意见反馈