摘要
醇致盐沉积法是一种基于盐沉积理论的调整地层吸水剖面的方法,将诱导剂和盐水段塞注入地层,盐的溶解度下降而析出盐粒,部分或全部堵塞渗流通道。室内实验表明,25.6%的KCl溶液和无水乙醇体积比为3∶2时,盐沉积量最高。KCl在水中的溶解度相比NaCl受温度影响更为显著,结合成本问题综合考虑,醇致盐调剖剂推荐选用浓度为26.4%的NaCl饱和溶液作为主剂和无水乙醇作为诱导剂段塞注入地层,使其在地层条件下沉积出盐结晶颗粒,达到调整地层吸水剖面的目的。
Alcohol induced salt precipitation is used to modify profile based on salt precipitation theory.Inducer and saturated salt water are injected in the formation,the solubility of salt will be decreased and the salt will be separated out,and then the salt can plug the pore in the reservoir formation.According to a series of experiments,the volume ratio of 25.6% KCl solution to ethanol was 3 ∶2,the amount of salt deposition was maximum.KCl solubility in water is more remarkable compared to NaCl affected by temperature.Taking the cost into consideration,saturated salt water（26.4% solution） and absolute ethyl alcohol are injected into the formation,then the saturated salt water will be separated out,and the profile is modified.
出处
《应用化工》
CAS
CSCD
2012年第2期187-189,共3页
Applied Chemical Industry
基金
大型油气田及煤层气开发国家重大专项技术(2011ZX05051)
关键词
盐沉积
调剖
优选
诱导剂
salt precipitation
profile modification
optimization
inducer
