摘要:
不管是油气的运移还是聚集过程都是在储层孔隙中进行的,因此,储层孔隙结构特征直接影响了油气的聚集过程和油气藏的形成分布特征。从孔隙结构出发,研究油气聚集的微观定量过程,划分油气聚集的三个定量阶段,建立了不同非均质组合单一圈闭和系列圈闭的油气聚集分布模型,对传统石油地质学进行了补充和完善,也在定量地质学研究方面进行了成功的尝试。
Abstract:
Because both migration and accumulation of oil and gas proceeded within the pore space of reservoir,the porosity structures directly have an effect on the accumulation of oil and gas as well as the formation and distribution of oil and gas reservoirs. Based on pore microstructure,the microscopic process of hydrocarbon accumulation is quantitatively studied by proposing three stages and relevant concepts models,which inclueds early migration with resistance force,interim accumulation and late filling. Several models of hydrocarbon accumulation and distrbution are also presented respectively according to the related serial complex traps and simple traps that are composed of various porelevel heterogeneous reservoirs.In homogeneous reservoir hydrocarbon accumulation is similar to capillary pressure curve and the change of oil saturation in reservoir directly has something to do with depth or height of oil column,it is also to say that oil saturation on the bottom of reservoir(nearly from the oil-water conatct)is lower,while oil saturation on the top of reservior is higher. In heterogeneous reservoir,the features of hydrocarbon accumilation are very complex,and,sometimes, it has regular features that oil saturation on the bottom of reservoir (nearly from the oil-water contact) is lower,while oil saturation on the top of reservoir is higher,but sometimes it has contrary ones,because of characteristics of internal combination in reservior.In serial traps,hydrocarbon accumulation has something to do with lots of macroscopic factors of reservoir that includes intercalated beds,different graded combination of pore structure type,connectedness of reservoir and so on. The conclusion makes a good complement to the traditional theories of petroleum geology.The study is also proved a successful attempt in quatitative geology.
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