黄骅坳陷寒武系—中新元古界潜山内幕成藏条件及勘探前景

doi:10.3969/j.issn.1672-7703.2018.06.006

摘要/Abstract

摘要： 基于黄骅坳陷与冀中坳陷和辽河坳陷潜山内幕成藏条件对比研究，分析黄骅坳陷寒武系—中新元古界潜山勘探潜力，明确勘探方向。研究认为黄骅坳陷寒武系—中新元古界勘探程度偏低，潜山内幕成藏地质条件好，潜山类型多，分布面积大，是一个十分有利的勘探领域。通过评价黄骅坳陷重点圈闭，提出有利（Ⅰ类）圈闭面积占48%，主要分布于歧口凹陷，具备形成较大规模潜山内幕油气藏的有利条件。尤其是大多数圈闭分布在洼槽区，深大断裂较发育，使寒武系—中新元古界白云岩优质储层与沙三段主力烃源层能够形成“侧向对接”，易形成较大规模的“新生古储”式潜山内幕油气藏，由此提出羊二庄潜山带上1号圈闭(羊二庄潜山)作为首选风险目标。

关键词: 勘探潜力, 潜山内幕, 成藏条件, 寒武系—中新元古界, 黄骅坳陷, 渤海湾盆地

Abstract: Based on the comparison of hydrocarbon accumulation conditions of inner buried hills among the Huanghua depression, Jizhong depression and Liaohe depression, the exploration potential of the inner buried hills of Cambrian to Meso-Neoproterozoic in the Huanghua depression, Bohai Bay Basin, was analyzed, and its exploration direction has been confirmed. The study results indicate that the Cambrian to Meso-Neoproterozoic in the Huanghua depression has lower exploration degree, the inner buried hill has good geologic conditions for hydrocarbon accumulation, with various types of buried hills and extensive distribution area, thus it is a much favorable exploration region. By evaluating the major traps of the Huanghua depression, it is concluded that the favorable (type I) traps accounts for 48% of the total trap area, and are chiefly distributed in the Qikou sag; they have the favorable conditions for forming large-scale reservoirs in inner buried hills. Especially, most traps are distributed in trough regions, with better developed deep-large faults, then the high-quality dolomite reservoirs in Cambrian to Meso-Neoproterozoic and the major source rock in the third member of the Shahejie Formation (Es3) can connect laterally, thus larger inner buried hill reservoirs with hydrocarbons being generated in younger strata and stored in older strata can be formed. Therefore, it is proposed that the No.1 trap (the Yangerzhuang buried hill) in the Yangerzhuang buried hill belt is the preferred exploration risk target.

Key words: exploration potential, inner buried hill, hydrocarbon accumulation condition, Cambrian to Meso-Neoproterozoic, Huanghua depression, Bohai Bay Basin

中图分类号:

方杰, 王兴元, 韩品龙, 吴丰成, 周学先, 王铜山. 黄骅坳陷寒武系—中新元古界潜山内幕成藏条件及勘探前景[J]. 中国石油勘探, 2018, 23(6): 46-58.

Fang Jie, Wang Xinyuan, Han Pinlong, Wu Fengcheng, Zhou Xuexian, Wang Tongshan. Hydrocarbon accumulation conditions and exploration potential of inner buried hills of Cambrian to Meso-Neoproterozoic in Huanghua depression, Bohai Bay Basin[J]. China Petroleum Exploration, 2018, 23(6): 46-58.

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