摘要
气田中6口井的17个莺二段的地层水样品进行化学组分分析,采用目前油田水研究普遍应用的苏林分类法进行分类。分别从平面上和垂向上来分析研究地层水的特征与成因,并综合本区构造活动及伴随的CO2上侵和岩石学方面的特征进行分析,判断气田水文地质条件、封闭状况及油气保存条件。研究结果认为,本区莺二段地层水以代表大陆环境的沉积水NaHCO3水型为主,也见Na2SO4及MgCl2水型。该区整体水动力较弱,油气保存较好,有利于天然气成藏。
In this study,17 formation-water samples of Yinggehai 2 Member,from six wells in DF1-1 gasfield,are at first carried out an analysis on chemical composition;and then they are classified by Sulin way;thirdly,the formation-water characteristics and origin are analyzed in lateral and vertical;at last,the hydrogeological,closure and preservation conditions of the gasfield are analyzed based on tectonic movements,accompanied CO2 invasion upward and petrology.It is considered that(1) the formation water of the member is mainly NaHCO3 type,a type of sedimentary water representing continental settings;(2) both Na2SO4 and MgCl2 types can be also found in formation water;and(3) in this gasfield,its hydrodynamics is basically poor whereas its hydrocarbon preservation is better,favorable for forming gas reservoir.
出处
《天然气勘探与开发》
2010年第2期19-22,共4页
Natural Gas Exploration and Development
关键词
莺歌海盆地
东方1—1气田
地层水特征
矿化度
油气保存
Yinggehai Basin,DF1-1 gasfield,formation-water characteristics,salinity,hydrocarbon preservation
