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根据盆地演化及生储盖组合特征,将中国南方盆地叠合关系分为覆盖型(连续覆盖型、间断覆盖型)和非覆盖型(下组合保持型、上组合保持型)。不同的覆盖关系对烃类的生成、演化、运移、保存或破坏有不同程度的影响。在不同覆盖类型的盆地中,以连续覆盖型盆地的油气勘探前景最为优越;具有间断覆盖特点的江汉南部的沉湖—土地堂复向斜和苏北盆地的南陵—句容—海安区块,其地质条件较为有利;上组合保持型覆盖地区的油气前景值得认真研究和探索,就保存条件来说,阿坝地区勘探前景优于南盘江地区;下组合保持型地区也具有良好的油气勘探远景;对于那些由于大型推覆构造所形成的特殊覆盖关系地区,下盘海相地层中的油气成藏和勘探值得重视。
According to the evolution of basin and the characteristics of reservoir-cap assemblage, the superimposition relations in the southern basin of China are divided into cover type (continuous cover type, intermittent cover type) and non-cover type (under combined hold type, combined hold type). Different coverage relationships have varying degrees of impact on hydrocarbon generation, evolution, migration, preservation or destruction. Among the different types of basins, the prospect of oil and gas exploration in continuous covered basins is the most superior. In the southern part of Jianghan with intermittent cover features, the Shenhu-Ditang synclinorium and the Nanling-Jurong-Haian block in the Subei Basin, The geological conditions are more favorable; the prospect of oil and gas in the upper and lower relict-covered areas deserves to be seriously studied and explored. For the preservation conditions, the prospect of Aba is better than that of Nanpanjiang; the lower retentive areas also have good prospect of oil and gas exploration For those areas with special coverage due to the large nappe structure, the accumulation and exploration of oil and gas in the lower platform marine strata deserve attention.