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在石油开采中，采出的石油伴生水的性质往往显示出油井所处地层的特征，根据实验室的油田水分析资料，有助于确定油田水所处地层的特点，了解油田水的来源。尤其在注水工程中，对于油田水的各种沉淀生成的预测、油田水与其它水的可混性研究，油田水的分析工作都是不可缺少的。本文对北部湾的几个油田水样进行了物理、化学分析，探讨了油田水特性，并将这些油田水分类。从本次研究得知，这些在海上油井采出的油田水，主要离子Cl-、Na+的含量相对于各自的总溶解盐来说是相似的，且与海水相似；不同地层采出的油田水性质差异较大。
In oil exploration, the nature of petroleum associated water is often characterized by the formation in which the well is located. Based on laboratory oilfield water analysis data, it helps to determine the characteristics of the formation where the oil is located and to understand the source of the water in the field. Especially in the waterflooding project, it is indispensable to predict the formation of various precipitation of oilfield water, the research on the miscibility of oilfield water and other water and the analysis of oilfield water. In this paper, several oilfield water samples in the Beibu Gulf have been subjected to physical and chemical analyzes, the water characteristics of the oilfields have been discussed, and the water classification of these fields has been studied. According to this study, the content of major ions Cl- and Na + in oilfield water produced at offshore oil wells is similar to the total dissolved salt and similar to that of seawater. The oilfield water extracted from different formations The nature of the difference.