湖北江陵凹陷科探井现场分析技术及其应用

江陵凹陷是江汉断陷盆地的一个面积宽广、矿产资源丰富的次级凹陷。通过对比钾盐等蒸发岩的分析技术,X射线荧光光谱技术(简称XRF)具有分析灵敏度高、样品制备简单、分析速度快等特点,有效的避免了岩盐和钾盐的易溶性和变化性所带来的影响。现场采集江陵凹陷科探井(SKD2)蒸发岩发育层段(327.11~437.70m)的岩屑样品,经处理、测定,分析结果与蒸发岩系盐类矿物成分具有较好的一致性。开展钻井实时化学监测技术研发、应用,为及时发现目标层、停钻取心提供数据支撑,对于蒸发岩勘查及钾盐找矿具有重要意义。

ON-SITE ANALYSIS FOR SCIENCE EXPLORATION WELL IN JIANGLING SAG AND APPLICATION

Jiangling sag is a faulted basin that have broad area and rich mineral resources in Jianghan basin. Because of advantages such as high sensitivity, simple sample preparation, rapid analysis and so on, X ray fluorescence technology (XRF), compared analysis technics for measuring evaporite, is appropriate for on-site analysis and can avoid influence by easy dissolubility and variability of rock salt and sylvite. Rock debris samples that existing -intervals (327.11-437.70m) of evaporite were collected in science exploration well (SKD2) in Jiangling sag and were measured by XRF. The result can be favourably compared with component of saline minerals of evaporite. The research and application of developing drilling monitoring technology can discover the target layer and can provide data support to drilling and coring. It is significance for prospecting potash evaporate in the future.