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化石韵律性,是指代表某一沉积环境的化石物种,在地质剖面的纵向上和水平方向上,与代表其它不同沉积环境的化石物种呈规律性交替式重复出现。海侵、地壳颤动和河流三角洲注入湖盆造成湖盆涨落所引起的沉积环境的变化,均可使化石在剖面的纵向和水平方向上形成韵律。这种韵律性,反映了石油生、储、盖层的关系。根据不同环境的化石物种分布状况的资料,可以帮助我们判断含油气情况。
Fossil rhythms refer to the fossil species that represent a sedimentary environment that appears regularly and alternately with fossil species representing other sedimentary environments, both longitudinally and horizontally in the geological profile. Transgression, crustal vibration and delta injection into the lake basin caused by fluctuations in the sedimentary environment caused by changes in the fossil can make the longitudinal and horizontal profile of the rhythm. This rhythm reflects the relationship between oil and gas, reservoir and overburden. Information on the distribution of fossil species in different environments can help us determine the status of oil and gas.