亚铁离子指标在地表油气化探研究工作中有效性及改进方法探讨  

INVESTIGATION ON THE EFFECTIVENESS OF FERROUS ION LNDEX IN THE SURFACE GEOCHEMICAL PROSPECTING OF OIL GAS AND ITS IMPROVEMENT METHOD

作　　者：徐庆鸿[1] 贾国相[1] 

机构地区：[1]中国有色金属工业总公司矿产地质研究院

出　　处：《矿产与地质》1998年第5期358-361,共4页Mineral Resources and Geology

摘　　要：亚铁离子（Ｆｅ２＋）是地表油气化探工作中重要的评价指标。铁元素的变价特征可导致铁离子的不同存在形式，直接利用Ｆｅ２＋值作为反映油气田上方还原柱性质的指标，存在一定的片面性。因此，提出用亚铁离子转化率Ｋ＝Ｆｅ２＋／Ｆｅ３＋＋Ｆｅ２＋的改进方法，并在实际勘查中验证，认为亚铁离子转化率可以为油气化探异常评价和靶区圈定提供更可靠的信息。Ferrous ion (Fe 2+ )is an important evaluation index in the surface geochemical prospecting of oil gas.The nature of variable valences of iron may lead to different existing forms of iron ion.So it is somewhat one sided to directly use the Fe 2+ values to reflect the property of the reduction column above the oil gas field.For this reason,a new index,namely the transfering percentage of ferrous ion (Fe 2+ ) defined by K=Fe 2+ /Fe 3+ +Fe 2+ ,is proposed as an improvement.The practice of the improvemcnt index in prospecting shows the new index may supply dependable information for the evaluation of anomalies and target outlineng in geochemical prospecting of oil gas.

关 键 词：亚铁离子转化率 化探指标 油气藏 地球化学勘探 

分 类 号：P618.130.8[天文地球—矿床学]