松南气田营城组油田水特征及演化规律

The characteristics and evolution regularities of oilfield water in Yingcheng Formation of the southern part of Songliao gas field

松南气田营城组油田水无色、无味道、半透明、含有少量絮状物。水型以NaHCO3型为主。油田水中阳离子组合基本保持Na+(K+)>Ca2+的关系,阴离子组合保持了HCO3->Cl->SO42-关系,离子质量浓度与矿化度线性正相关。按离子组成划分3类4型。按产出与特征演变主要划分为3个阶段。平面展布上油田水不受地域控制,无规律性可循。在纵向上产出类型复杂,具多样性,各项离子特征变化不受深度影响。总体来看油田水特征主要受火山机构、岩相岩性、构造及开发阶段影响。

The oilfield water in Yiagcheng formation of the southern part of Songliao gas field show some characteristics of tasteless,colorless translucent,containing a small amount of Floc.The type is dominated by NaHCO3.The cationic relations is Na ＋（K ＋） Ca2 ＋,The anion combination relations is HCO3-Cl-SO42-,The Ion content is positive linear correlation with degree of mineralization.According to the ionic composition,it is divided into three categories and four types,It can be divided into three stages with evolution characteristics.The planar distribution of oil field water is not controlled by district,without rules to follow.The output type is complex in the vertical,with diversity,the ion characteristics is not affected by depth.Overall,the oilfield water feature is mainly affected by the volcanoes,lithofacies and lithology,structure and development.