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塔河油田及邻区主要油气储层的地层水以高矿化度为特征 ,长期以来多数人认为这类地层水代表了互不沟通的深层封存环境的产物。该文通过对该区地层水的系统采样分析 ,从地层水的组成特点及所反映的成因环境 ,提出 :a)塔河油田及邻区地层水具有反向化学剖面的特点 ,高矿化度与溶滤地层中的岩盐有关 ;b)氢 (δD)氧 (δ1 8O)同位素明显偏轻 ,δD最大为 -4 2 .0‰ ,最小值为-6 6 .0‰ ,δ1 8O最大值为 2 .7‰ ,最小值为 -6 .0‰ ,反映出地表水渗混溶滤成因的地层水 ;c)通过对比研究区内地层水的主要受地表水渗流 ,溶解地层中的NaCl,而形成高矿化度地层水。塔河油田及邻区是一个水文地质环境相对活跃的地区 ,因此 ,对该地层水的成因环境对该区油气的运聚、保存条件的影响需进一步的考虑。
Formation water in the major oil and gas reservoirs of Tahe Oilfield and its adjacent areas is characterized by a high degree of mineralization, which for a long time now is considered by most to represent such a product of deep sequestration that does not interact with each other. Based on the systematic sampling and analysis of formation water in this area, this paper presents the characteristics of formation water and the genetic environment that it reflects: a) The formation water in Tahe oilfield and its adjacent area has the features of reverse chemical profile, high salinity (Δ18O) isotopes of hydrogen (δD) are obviously light, the maximum δD is -4.2 ‰, the minimum is -6 6 .0 ‰, and the maximum of δ1 80 is 2 7 ‰, the minimum value of -6. 0 ‰, reflecting the formation of surface water seepage-mixing formation of stratigraphic water; c) through the comparative study of formation water within the main surface water seepage, dissolving NaCl in the formation, and Formation of high salinity formation water. The Tahe oilfield and its adjacent area is a relatively active hydrogeological environment, so further consideration should be given to the influence of the formation environment of the formation water on the migration and accumulation of oil and gas in this area.