储层石英生长影响因素的实验证据

Experimental evidence of influential factor of quartz growth in reservoir

设计不同盐度、不同油水比及不同油品的人工合成石英烃类包裹体的实验,考察不同成岩条件下油气充注对石英生长的影响,对合成烃类包裹体的岩相学特征、均一温度、荧光测试结果进行分析,讨论油水比、油品性质、盐度等因素对石英生长的影响。结果表明:含油气条件下石英晶体能够继续生长从而捕获烃类包裹体,但是也受到了一定抑制,抑制作用随着含油饱和度增高而增强;油气可能会完全终止矿物的生长,但边界条件还有待于进一步确定;较高的盐度促进了石英包裹体的形成,轻质油对石英晶体生长的抑制作用要相对大于重质油的抑制作用。

Experiments of different salinity,oil-water ratio and oil were carried out to synthesize oil （hydrocarbon）-bearing inclusions in quartz.Effects of hydrocarbon emplacement on quartz growth were studied on the basis of experimental results.Through analysis of petrographical character,homogenization temperature and fluorometric analysis results of synthetic hydrocarbon inclusions,the effects of oil-water ratio,salinity and oil quality on quartz growth were researched.As shown from the experiments,quartz could continue growing and trapping hydrocarbon inclusions under hydrocarbon emplacement.But it was restrained by hydrocarbon.The effect became more intense along with oil saturation increasing.Oil might terminate the growth of mineral but the boundary needs to be confirmed.Trapping inclusions in quartz was improved by relatively high salinity.The inhibiting effect of light oil on quartz growth was relatively more intense than that of heavy oil.