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  

Hydrocarbon accumulation conditions and exploration potential of inner buried hills of Cambrian to Meso-Neoproterozoic in Huanghua depression, Bohai Bay Basin

作　　者：方杰[1] 王兴元[2] 韩品龙 吴丰成[1] 周学先 王铜山[1] Fang Jie;Wang Xinyuan;Han Pinlong;Wu Fengcheng;Zhou Xuexian;Wang Tongshan(PetroChina Research Institute of Petroleum Exploration ＆ Development;College of Geosciences and Surveying Engineering,China University of Mining and Technology（Beijing)

机构地区：[1]中国石油勘探开发研究院地质所 [2]中国矿业大学(北京)地球科学与测绘工程学院

出　　处：《中国石油勘探》2018年第6期46-58,共13页China Petroleum Exploration

基　　金：国家科技重大专项"渤海湾盆地北部油气富集规律与增储领域研究"(20111ZX05006-005)

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。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 yonnger 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.

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 

分 类 号：TE112.3[石油与天然气工程—油气勘探]