The Huanghua depression located in the hinterland of the Bohai Bay Basin in eastern China is a typical area for the research of multistage magmatic activities with hydrocarbon enrichment, many high-yield wells related to igneous rocks were discovered within the Cretaceous strata in recent years. However, the spatial and temporal distribution of Cretaceous igneous rocks remains unclear, and the relationships among magmatic sequence, lithology, and hydrocarbon enrichment have been poorly studied. In order to solve these problems, core observation, logging analysis, major element analysis, zircon U-Pb chronology, oil-bearing grade statistics and reservoir spaces analysis were used to subdivide the magmatism cycles and to investigate the characteristics of igneous reservoirs. Our results show that the Mesozoic magmatism in Huanghua depression started in 140.1±1.4 Ma and could be divided into two stages including the Early Cretaceous stage and Late Cretaceous stage. The Early Cretaceous magmatism principally developed basic-intermediate rocks in the north zone, and could be subdivided into 3 cycles with their forming ages of 140, 125–119, and 118–111 Ma, respectively. By contrast, the late stage mainly developed intermediate-acid rocks centralized in the south zone and formed at 75–70 Ma. The GR and SP curves are good indicators for the contrast of different lithologies, lithofacies and for magmatic sequences division. Intensive magmatism may have an advantage to form reservoirs, since basalt in cycle III in the Early Cretaceous and dacite porphyrite in the Late Cretaceous have great exploration potential. Lithology and tectonic fractures have an important influence on the formation of reservoir spaces and hydrocarbon enrichment. The characteristics of Cretaceous magmatism and igneous reservoirs in Huanghua depression and adjacent areas are summarized, providing important information for igneous reservoirs research and oil-gas exploration in the Cretaceous in related areas.

位于华东渤海湾盆地腹地的黄hua凹陷是研究油气富集多阶段岩浆活动的典型地区，近年来在白垩纪地层发现了许多与火成岩有关的高产井。但是，白垩纪火成岩的时空分布尚不清楚，对岩浆层序，岩性和油气富集之间的关系还缺乏研究。为了解决这些问题，利用岩心观测，测井分析，主要元素分析，锆石U-Pb年代学，含油品位统计和储层空间分析来细分岩浆活动周期并研究火成岩储层的特征。结果表明，黄hua凹陷中生代岩浆作用始于140.1±1.4 Ma，可分为白垩纪早期和白垩纪晚期两个阶段。早白垩纪岩浆作用主要在北部地区发育基本中性岩石，并且可分为三个旋回，其形成年龄分别为140、125-119和118-111 Ma。相比之下，后期主要发育集中在南部带并形成在75-70 Ma的中酸性岩石。GR和SP曲线是不同岩性，岩相和岩浆层序对比的良好指示。强烈的岩浆作用可能具有形成储层的优势，因为白垩纪早期的第三轮玄武岩和白垩纪晚期的闪锌矿斑岩具有很大的勘探潜力。岩性和构造裂缝对储集空间的形成和油气富集具有重要影响。总结了黄hua凹陷及邻近地区白垩纪岩浆岩和火成岩的特征，为相关地区白垩纪的火成岩研究和油气勘探提供重要信息。