DIRECT INDEX OF PALEOTEMPERATURE OF HIGH MATURE MARINE FACIES CARBONATE SEQUENCES-HOMOGENIZATION TEMPERATURE OF FLUID INCLUSIONS
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摘要: 对川东北地区多口钻井岩心样品包裹体均一温度、盐度、密度等的系统分析发现,该地区具有3期烃类流体活动的迹象。包裹体均一温度与盐度、密度具有较好的相关性,在古今地温梯度变化不大的情况下,可以利用实测包裹体均一温度与古地温梯度推算当时的最大埋深或剥蚀厚度,恢复其热演化历史。储层最高包裹体均一温度与镜质体反射率、实测地温、伊利石结晶度等多项指标均具有较好的相关性,是现今开展海相高演化地区热史恢复的一项直接、有效的指标。Abstract: Based on analyses of homogenization temperature,salinity and density of fluid inclusions in core samples from wells in the northeast of Sichuan Basin,there are 3 stages of hydrocarbon fluid activities in the region.Homogenization temperature,salinity and density of fluid inclusions are closely related.When ancient and present geothermal gradient changes are small,measured fluid inclusion homogenization temperature and palaeogeothermal gradient can be used to calculate the maximum burial depth or corrosional thickness,so as to restore thermal evolution history.Homogenization temperature of fluid inclusion,Ro,measured strata temperature and illite crystallinity are also closely related.They are direct and effective index used in thermal evolution history restoration in high mature marine facies regions.
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