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成岩和成油各阶段形成的包裹体在成分、温度上的差异反映了油气演化程度,使人们可对油气演化规律获得更清楚的认识,因而可为油气的进一步勘探开发提供依据。石油包裹体,多数是在油、气、水不混溶条件下被捕获形成的,它除了可以作为找油的直接标志外,其单个包裹体气相成分以及同期形成的盐水溶液包裹体均一温度可作为油气成熟度划分的可靠依据,并可以排除油气二次运移时混入的他源气体。探讨了渤海湾济阳坳陷已知不同成熟度油田的原油与其所获包裹体的类型、均一温度和气相成分等的关系,并以其规律为依据,以中外三个不同地区油田的包裹体为实例,从其类型、均一温度和气相成分上反推了这些油气田的石油成熟度及其油气演化规律。
The differences in composition and temperature of the inclusions formed at each stage of diagenesis and oil formation reflect the degree of evolution of oil and gas so that people can get a clearer understanding of the evolution law of oil and gas and thus provide a basis for further exploration and development of oil and gas. Petroleum inclusions, most of which are trapped under oil, gas and water immiscibility, can not only be used as a direct marker for oil discovery, but also have the same gas composition of single inclusions and the homogenization temperatures of brine inclusions formed in the same period As a reliable basis for the division of oil and gas maturity, and can exclude other sources of gas mixed with oil during the second migration. This paper discusses the relationship between the type of crude oil, the homogenization temperature and the gas phase composition of the known oilfield of different maturity in the Jiyang Depression of Bohai Bay. Based on its laws, As an example, the oil maturity of oil and gas fields and their hydrocarbon evolution are deduced from their type, homogenization temperature and gas composition.