渤海海域庙西中南洼勘探潜力分析

发布时间：2018-05-27 18:58

本文选题：庙西中南洼 + 边缘凹陷　；参考：《特种油气藏》2017年02期

【摘要】：渤海海域庙西凹陷为渤海湾盆地众多边缘凹陷之一,其成凹、成烃、成藏研究相对富生烃凹陷较为薄弱,制约了勘探进程。通过对庙西凹陷中南洼构造、沉积、地化及成藏等综合研究,形成了一套边缘凹陷分析方法:以凹陷构造研究为切入点,综合考虑断裂、隆起作用,明确凹陷动力成因机制,进而厘定边缘凹陷构造演化和原型盆地,在此基础上进行资源潜力及圈闭演化研究,预测有利勘探方向。通过研究,总结了4种断裂-隆起协同演化模式,明确了研究区盆地边缘的演化特征,发现中南洼古近纪盆地面积为现今残留盆地的3倍以上;确认沙三段烃源岩是庙西凹陷中南洼的一套优质烃源岩,估算了其生烃量;并在断裂-隆起协同演化模式指导下,明确了圈闭成因模式及分布;结合区域成藏研究,预测了庙西中南洼有利勘探方向及区带,提出了下一步勘探建议。
[Abstract]:Miaoxi sag in Bohai Sea area is one of many marginal sag in Bohai Bay basin. The research on hydrocarbon generation and hydrocarbon generation is relatively weak, which restricts the exploration process. Based on the comprehensive study of the structure, deposition, geochemistry and reservoir formation of the Zhongnanwa in the Miaoxi Sag, a set of analysis methods of the marginal sag are formed: taking the research of the sag structure as the starting point, considering comprehensively the faults, the uplift and the mechanism of the dynamic genesis of the depression, Furthermore, the tectonic evolution and prototype basin of marginal sag are determined, on the basis of which the resource potential and trap evolution are studied, and the favorable exploration direction is predicted. Based on the study, four kinds of synergetic evolution models of fault-uplift are summarized, and the evolution characteristics of basin margin in the study area are clarified. It is found that the area of Paleogene basin in Zhongnanwa is more than three times as large as that of the present residual basin. It is confirmed that the source rock of the third member of the Shahejie formation is a set of high quality source rocks in the Zhongnanwa of Miaoxi Sag, and its hydrocarbon generation is estimated, and the genetic model and distribution of the traps are defined under the guidance of the synergistic evolution model of the fault-uplift, and combined with the study of regional reservoir formation. The favorable exploration direction and zone in the central and southern Miao depression are forecasted, and the next exploration suggestions are put forward.
【作者单位】：中海石油(中国)有限公司天津分公司;
【基金】：“十二五”国家科技重大专项“渤海大中型油气田地质特征”(2011ZX05023-006-002)
【分类号】：P618.13

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