包裹体在石油地质研究中的应用与问题讨论

包裹体在石油地质领域主要应用于确定成岩和成藏作用的时间与温度,推断油气运移、构造运动及古热流历史。其应用前提是流体包裹体是在均一体系中形成的,形成后保持封闭和等容体系。由于包裹体具有成分复杂、形态各异的特性,所以后期易随温度和压力的变化而产生塑性变形或爆裂,导致所测均一温度值失真。因此,在应用包裹体均一温度时,必须分析包裹体形成后的变化及成藏、成岩作用对它的影响,进行均一温度校正。将包裹体中烃的等容线的起点定在现今油藏油的泡点曲线上,而等容线的另一点由包裹体的爆裂温度和矿物所承受的包裹体内压力来确定,油气包裹体的等容线与盐水包裹体等容线的交点的温度和压力即为其捕获时的温度和压力。

APPLICATION OF FLUID INCLUSIONS TO PETROLEUM GEOLOGICAL STUDY AND DISCUSSION

This paper summerizes the research advances and application methods of fluid inclusion homogenization temperature,especially in the aspects of determining the time of oil reservoir formation,petroleum expulsion,oil migration,history of deposition and uplift and geothermal gradient.Some problems relating to the criteria of homogenization temperature resetting and pressure correction,the application of fluid inclusion homogenization temperature and petroleum geology are discussed.