渤海湾盆地黄骅坳陷古潜山的宏观展布特征与演化过程  

Macroscopic distribution characteristics and evolution process of buried hill in the Huanghua depression,Bohai Bay basin

作　　者：张津宁 付立新[1] 周建生[1] 楼达[1] 李宏军[1] 赵勇刚[1] 冯建园[1] 王鑫[1] ZHANG Jinning;FU Lixin;ZHOU Jiansheng;LOU Da;LI Hongjun;ZHAO Yonggang;FENG Jianyuan;WANG Xin(Dagang Oilfield Company , PetroChina , Tianjin, 300280;Research Institute of Petroleum Exploration & Development, CNPC, Beijing 100083)

机构地区：[1]中国石油大港油田公司,天津300280 [2]中国石油勘探开发研究院,北京100083

出　　处：《地质学报》2019年第3期585-596,共12页Acta Geologica Sinica

基　　金：中国石油天然气股份有限公司重大科技专项"大港油区效益增储稳产关键技术研究与应用"(编号2018E-11-02)资助成果

摘　　要：古潜山的形成与发育受控于多期构造运动,在不同构造背景下所表现出的结构形态是有规律可循的,呈现出成群、成带分布的现象。本文以黄骅坳陷潜山宏观展布特征为研究重点,利用三维地震资料,解剖潜山结构特征,探讨潜山的演化过程。研究表明,黄骅坳陷古潜山可分为基岩褶皱形成的潜山背斜群、基底断块掀斜作用形成的大型断鼻和盆缘裙边断鼻潜山构造三大类潜山。歧口凹陷内部潜山构造带总体构成"轮毂"式格局,沧东-盐山断陷区潜山带结构整体性强,以大型背斜构造为主。基底逆掩断裂系统复杂化潜山构造带内幕结构,可分为三角逆冲构造、背驮式逆冲构造及双重构造等。三大拆离伸展构造系统控制掀斜断块潜山的分布,形成以断鼻和断垒构造为主的潜山构造群。黄骅坳陷古潜山分为四个主要演化阶段:中元古代至古生代末为潜山内幕地层建造阶段,中生代为潜山内幕构造发育阶段,新生代古近纪为潜山宏观面貌定型阶段,新近纪为潜山深埋阶段。The formation and development of buried hill are controlled by multi-stage tectonic movements. But their structural forms can be identified because they often occur in group and band distribution in different tectonic settings. With an emphasis on the distribution characteristics of buried hill in the Huanghua depression, this paper analyzed the process and features of buried hill evolution using 3 D seismic data. The study shows that the buried hill in the Huanghua depression can be divided into three types, buried hill anticline group formed by differential uplift of basement, large fault nose structure formed by tilting of basement fault block and fault nose buried hill structure of basin margin. The buried hill belt in the Qikou sag generally presents a "wheel hub" pattern, and the structure of buried hill in the Cangdong-Yanshan sag shows integrity which is dominated by large anticline structure. The thrusting fault system of basement resulted in the much complicated internal structure of the buried hill and can be divided into trigonometric thrust structure, piggyback thrusting structure and duplex structure. Three large detached extensional tectonic systems control the distribution of the tilted block buried hill, forming buried hill structural group dominated by fault nose structure and horst structure. The buried hill consists of four main stages of evolution in the Huanghua depression: the construction stage of buried hill interior strata from Mesoproterozoic to late Paleozoic, the tectonic development stage of the buried hill interior in the Mesozoic, the stage of buried hill macro stereotype in the Paleogene, and the subsidence stage of buried hill in the Neogene.

关 键 词：古潜山 潜山成因 构造特征 构造演化 黄骅坳陷 渤海湾盆地 

分 类 号：P618.13[天文地球—矿床学]