印支——燕山运动对大港探区古潜山形成的控制作用

发布时间：2018-03-30 10:16

本文选题：大港探区　切入点：印支—燕山运动　出处：《石油学报》2016年S2期

【摘要】：基于三维地震勘探及钻井资料,系统研究了古生界、中生界残留地层分布及基岩断裂体系,重构了晚三叠世—早白垩世期间的古构造格架。根据古构造样式及演化的研究,明确大港探区基底构造经历了印支—早燕山阶段的逆冲褶皱和差异隆升、燕山运动中期拉分断陷两大演化阶段。探区内古潜山圈闭形成与分布受控于上述古构造演化,印支—燕山运动构造变形对古潜山发育的影响主要表现在3个方面:(1)印支—早燕山期古构造背景控制潜山类型的有序分布,形成古地貌残丘潜山、断块-地貌潜山以及构造变形潜山,并表现出与古近纪盆地结构反转分布的特点;(2)潜山内幕圈闭样式与裂缝型储层发育则受古构造变形体系控制,古隆起与古斜坡区古逆冲及走滑构造控圈闭特点明显;(3)印支—燕山构造运动控制古生界差异剥蚀,跷跷板反转的古斜坡区发育内幕隐蔽型潜山圈闭。中生代印支—燕山运动决定和影响了大港探区古潜山的油气类型和分布,综合考虑构造和石油地质因素,大港探区中、低位序古地貌残丘潜山和内幕隐蔽型潜山勘探潜力较大,而远离生烃灶的高位序断块潜山油气保存条件差、潜力最小。
[Abstract]:Based on the 3D seismic exploration and drilling data, the distribution of Paleozoic and Mesozoic residual strata and the basement fault system are systematically studied, and the paleotectonic framework during the late Triassic to early Cretaceous is reconstructed. It is clear that the basement structure of the Dagang exploration area has experienced the thrust fold and differential uplift of the Indosinian to early Yanshanian stage, and the two major evolution stages of the mid-Yanshanian rift depression. The formation and distribution of the buried hill traps in the exploration area are controlled by the evolution of the paleotectonics mentioned above. The influence of Indosinian Yanshanian movement structural deformation on the development of buried hill is mainly manifested in three aspects: 1) Indosinian and early Yanshanian paleotectonic background controls the orderly distribution of buried hill type and forms paleomorphological remnant hill buried hill. Fault-geomorphologic buried hill and structural deformation buried hill, which show characteristics of inversion distribution of structure in Paleogene basin, are controlled by paleotectonic deformation system, and the inside trap style and the development of fractured reservoir in buried hill are controlled by paleotectonic deformation system. The paleo-thrust and strike-slip tectonic-controlled traps of paleo-uplift and paleo-slope area are obviously characterized by Indosinian Yanshanian tectonic movement to control the differential erosion of Paleozoic. The Indosinian Yanshan movement determined and affected the oil and gas types and distribution of the buried hill in the Dagang exploration area, taking into account the structural and petroleum geological factors, in the Dagang exploration area, The low order paleogeomorphic buried hill and hidden buried hill have great potential for exploration, while the buried hill of high order fault block far from hydrocarbon generating range has poor oil and gas preservation conditions and minimum potential.
【作者单位】：中国石油大港油田公司;中国石油大学地球科学学院;中国石油勘探开发研究院廊坊分院;
【基金】：中国石油天然气股份有限公司重大科技专项“大港油区大油气田勘探开发关键技术研究”(2014E-06-02)资助
【分类号】：P618.13

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