摘要
对长岭断陷腰英台—查干花地区营城组主要探井油田水常规化学组分特征和微量元素特征进行了分析。该区NaHCO3型水占总样品数的80%,CaCl2型水主要分布于YS1和YS2井区;ρ(HCO-3)、总矿化度、脱硫系数等参数之间存在着较好的匹配性,矿化度高值区对应脱硫系数低值,反映地层封闭性好、水交替作用缓慢,有利于油气聚集及保存。钾含量高可能是储层储渗性能好的一个标志,钡含量较高则反映了其地层处于较强的还原环境中,可能具有更为有利的天然气保存环境。结合该区构造活动的影响,表明根据油田水水文地质特征能有效地判断油气储集和保存条件。
The conventional chemical composition and trace element characteristics of oilfield exploratory wells of the Yingcheng Formation in Yaoyingtai-Cbaganhua area in the Changling water from main Fault Depression were analyzed. The NaHCO3 type water accounts for 80% of water samples. The CaC12 type water mainly distri- butes around wells YS1 and YS2. p（ HCO3 ）, total salinity （TDS）, and desulfurization coefficient （rSO24×100/ rC1-） are well consistent with each other. High TDS area corresponds to low desulfurization coefficient, indica- ting for good sealing capacity and slow water exchange, which are favorable for petroleum accumulation and pre- servation. The high content of K is a sign for good permeability reservoir. The high content of Ba reflects a strong reducing environment and may be more favorable for natural gas preservation. In brief, combined with tectonic activity, the hydrogeochemical characteristics of formation water can be used to effectively judge the conditions for petroleum accumulation and preservation.
出处
《石油实验地质》
CAS
CSCD
北大核心
2013年第3期269-273,279,共6页
Petroleum Geology & Experiment
基金
中国石油化工股份有限公司科技部项目(P05037)资助
关键词
油田水
水文地质
总矿化度
脱硫系数
微量元素
长岭断陷
松辽盆地
oilfield water
hydrological geology
total salinity
desulfurization coefficient
trace element
Changling Fault Depression
Songliao Basin
