南堡1号构造带新生代断层与火成岩发育特征及其联合控藏作用

断层分期、分段特征的精细研究是渤海湾断陷盆地精细勘探的关键。然而，地震资料品质差和解释模型的固化极大地制约了对不同类型断层成因、构造样式及其控藏作用的系统认识以及潜力区的挖掘。基于地震资料、钻井取心及测试数据，系统研究了南堡1号构造带断层与火成岩的发育特征及其联合控藏作用。研究认为，南堡1号构造带的控区带断层在新生代经历3期构造运动、具有3段差异生长特征，形成了渐新世中、晚期—中新世早期与岩浆通道系统相伴生的构造和上新世—更新世由新构造运动产生的复式塌陷背斜构造，控制了馆陶组大面积广覆式喷发岩的分布、中—深层碟形侵入岩沿大型断层的侵入以及中—浅层复杂断块圈闭的形成。不同类型的断层与火成岩联合控制了南堡1号构造带的油气成藏和富集，上新世—更新世断层与厚层火山岩盖层的时空配置控制了东营组断块圈闭的形成，渐新世中、晚期的通道断层控制了岩浆通道系统相关圈闭的形成，晚期继承性活动的断层控制了油气运移而由断层分段连接点所形成的调节带则控制了油气富集。中—浅层复杂断块圈闭形成时间的厘定、岩浆通道系统相关圈闭以及调节带的发现拓宽了南堡凹陷中—浅层精细勘探的研究思路，对渤海湾盆地富油气凹陷的精细勘探具有一定指导意义。

Development characteristics of the Cenozoic faults and igneous rocks and their joint control of hydrocarbon accumulation in the Nanpu No.1 structural belt

The detailed study of fault periods and segmentation features is the key to the fine exploration of Bohai Bay Basin. However, the seismic data with poor quality and the stereotyped interpretation model greatly restrict the systematic understanding of the genesis, structural styles, and control of hydrocarbon accumulation for different types of faults as well as the exploitation in potential areas. Based on seismic data, drilling cores, and test data, the development characteristics of faults and igneous rocks, and their joint control of hydrocarbon accumulation in the Nanpu No.1 structural belt were systematically studied. The study shows that the zone faults in the Nanpu No.1 structural belt experienced three phases of tectonic movement in Cenozoic, and had different growth characteristics of 3 segments, forming the structures associated with the igneous plumbing system in the Middle-Late Oligocene to Early Miocene and the complex collapse anticlinal structure generated by the Pliocene to Pleistocene neotectonic movement, and controlling the distribution of large-scale overlying eruptive rocks in Guantao Formation, the intrusion of dish intrusive rocks along large faults, and the formation of complex fault block traps in the middle-shallow strata. Different types of faults and igneous rocks jointly control the hydrocarbon accumulation and enrichment in the Nanpu No.1 structural belt. The spatial-temporal configuration of the Pliocene-Pleistocene faults and thick volcanic rock caps control the formation of fault-block traps in Dongying Formations. The plumbing faults in the Middle-Late Oligocene control the formation of traps related to the igneous plumbing system. The faults formed by inherited activities in the late period control the hydrocarbon migration, and the transition zone formed by the connection points of fault segments control the hydrocarbon enrichment. The determination of formation time of the complex fault-block trap and the discovery of the traps related to the igneous plumbing system and the transition zone in middle-shallow strata have broadened the strategy of the fine exploration of middle-shallow targets in Nanpu sag, and have certain guiding significance for the fine exploration of the oil-gas rich sag in Bohai Bay Basin.