泌阳凹陷北部斜坡石油成藏组合特征

泌阳凹陷北部斜坡发育有Eh3^上亚段未熟-低熟原油、Eh3^上产亚段成熟原油和Eh3^下亚段低熟原油，分别来自于凹陷中部Eh3^上亚段成熟烃源岩，古城东南部Eh3^上亚段未熟-低成熟烃源岩和杨楼油田Eh3^下亚段未熟-低熟烃源岩。在成藏期次分析基础上，根据北部斜坡储集层分布、油源类型、油气运聚与圈闭形成的配套情况，可划分出3个成藏组合，即王集-新庄Eh3^上亚段成熟油成藏组合、杨楼Eh3^下亚段未熟-低熟油成藏组合、古城断鼻复合成藏组合。

Characteristics of Hydrocarbon Accumulation Assemblage in the North Slope of Biyang Depression

In the north slope in Biyang Depression, immature and low mature crude oil is developed in the upper member of Eh_3 and mature oil in the upper member of Eh_3 and low mature oil in the lower member of Eh_3 are developed, which are from the mature source rocks in the upper member of Eh_3 in the middle of the depression, from the immature-low mature source rocks in the upper member of Eh_3 in southeast of Gucheng Oilfield and from the immature-low mature source rocks in the lower member of Eh_3 of Yanglou Oilfield respectively. On the basis of analyzing the periods and times of hydrocarbon accumulaton, in combination with the situations of reservoir distribution, type of oil source, hydrocarbon migration and accumulation and formation of traps in the north slope, 3 hydrocarbon accumulation assemblages, such as the assemblage of Wangji-Xinzhuang Eh~ upper_3 mature oil reservoir; and the assemblage of Yanglou Eh~ lower_3 immature-low mature oil reservoir; and fault nose combined assemblage in Gucheng can be divided.