摘要
对靖边气田奥陶系和石炭—二叠系产出的油田水进行常、微量元素分析，分析结果表明: 样品富集 Br－、I－、Li+、K+，奥陶系的 Br－、I－、Li+以及石炭—二叠系的 Br－和 K+都已经达到工业开采或综合开采标准。其高 Br－含量特征以及相关水化学参数特点反映靖边气田油田水主要为海相沉积型卤水，且保存环境较封闭，具有很好的原生性; 同时，高的溴氯系数及钾氯系数说明奥陶系海水高度浓缩，并已经达到钾盐沉积阶段，反映靖边气田所在的陕北盐盆西部可能有固体钾盐沉积存在。而石炭—二叠系油田水除对原始沉积卤水的保存外，可能受到富钾围岩的影响。The analysis result of the major element and trace element of the oil field water from Ordovician and carbonic-Permian in the Jingbian gas field indicate that the water samples are rich in Br，I，Li，K. The contents of Br、I、Li from the Ordovician oil field water and Br and K from the Carbonic-Permian oil field water reach the standards of industrial exploitation or combined exploitation. The high content of Br and the character of water chemistry indicate that the oil field water in Jingbian gas field is marine sedimentary brine, and the preservation circumstance is closed, showing the character of reducibility well. At the same time, the high values of Br/Cl×103 and K/Cl×103 illustrate the oil field water derives from the sea water concentrating strongly, and getting the stage of potash depositing. It infers it is probable the solid potash also exist in the west of the Shanbei salt basin, not only in the east.
NSTRS