摘要
塔中地区石炭系底部不整合面之上,由西向东,总体上具有水势降低、原油物性变好、油田水总矿化度和二价阳离子浓度增高以及γNa/γCl降低等趋势。这些变化规律说明该区存在淡水的水动力冲刷作用。在塔中4号构造上,由CⅢ油组往上,油田水氢、氧同位素值发生正偏移,至CⅠ油组又变轻;指示着淡水是自下而上运动的,且对CⅠ油组的影响较CⅡ明显。油、水化学表征结果与之一致。
In the west part of central Tarim basin,the highest hydraulic potentials are associated with the lowest TDS and amount of divalent cations,and with the highest γNa/γCl Toward east,the above parameters increase or decrease orderly They reflect recharge in the west along the C/S or C/O unconformitiy In the TZ4 structure,from C Ⅲ unit upward,hydrogen and oxygen stable isotopes are shifted positively,and toward C Ⅰ unit shifted negatively,indicating meteoric water flow upward and C Ⅰ unit are influenced more than C Ⅱ The conclusion drawn here is consistent with the changes of oil and water compositions
出处
《江汉石油学院学报》
CSCD
北大核心
1997年第3期30-33,共4页
Journal of Jianghan Petroleum Institute
基金
国家"八五"重点科技攻关课题
关键词
水文地质学
石炭纪
盆地
生油岩
hydrogeology
oilfield water
(fluid heterogeneity)
Carboniferous period
Tarim basin