石油勘探与开发 >

2019 , Vol. 46 >Issue 2: 254 - 267

DOI: https://doi.org/10.11698/PED.2019.02.06

油气勘探

渤海海域走滑断裂叠合特征与成因机制

  • 胡志伟 ,
  • 徐长贵 ,
  • 王德英 ,
  • 任健 ,
  • 柳屿博 ,
  • 肖述光 ,
  • 周鑫
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  • 中海石油（中国）有限公司天津分公司 天津300452
胡志伟（1986-）,男,湖北仙桃人,硕士,中海石油（中国）有限公司天津分公司渤海石油研究院工程师,主要从事构造地质与石油地质综合研究工作。地址：天津市滨海新区,渤海石油管理局渤海石油研究院,邮政编码：300459。E-mail: huzhw@cnooc.com.cn

收稿日期: 2018-08-10

  网络出版日期: 2019-01-24

基金资助

国家科技重大专项（2016ZX05024-002,2016ZX05024-003）

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Superimposed characteristics and genetic mechanism of strike-slip faults in the Bohai Sea, China

  • HU Zhiwei ,
  • XU Changgui ,
  • WANG Deying ,
  • REN Jian ,
  • LIU Yubo ,
  • XIAO Shuguang ,
  • ZHOU Xin
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  • CNOOC Tianjin Company, Tianjin 300452, China

Received date: 2018-08-10

  Online published: 2019-01-24

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摘要

以全三维地震构造解释为基础,结合构造物理模拟、构造样式解析和磷灰石裂变径迹分析等研究,探讨渤海海域新生代走滑断裂的构造特征与成因机制。研究结果表明,渤海海域新生代郯庐走滑断裂在古近系沙河街组四段沉积末期完成了从左旋走滑到右旋走滑的转变,总体经历3期明显走滑活动。渤海海域走滑断裂具有多期次、多性质应力叠合的特征,根据不同强度、不同性质、不同配比条件下的叠合方式,可划分为伸展-走滑叠合、伸展-挤压叠合、挤压-走滑叠合3大成因类型和15种典型构造样式。受新生代太平洋板块俯冲方向和速率多次变化的影响,渤海海域地壳薄化伸展和走滑拉分作用并存,但在不同时期和地区,两者叠合配比差异明显,导致断裂体系的差异叠合性和凹陷结构的分区性。依据断裂叠合特征,渤海海域可以划分为辽西S型弱走滑区、辽东辫状强走滑区、渤西共轭中等走滑区、渤东帚状中等走滑区和渤南平行强走滑区5大叠合构造区,不同叠合构造区油气差异富集特征不同。图14参38

关键词： 走滑断裂; 叠合特征; 成因机制; 郯庐断裂; 渤海湾盆地; 渤海海域; 构造物理模拟

本文引用格式

胡志伟 , 徐长贵 , 王德英 , 任健 , 柳屿博 , 肖述光 , 周鑫 . 渤海海域走滑断裂叠合特征与成因机制[J]. 石油勘探与开发, 2019 , 46(2) : 254 -267 . DOI: 10.11698/PED.2019.02.06

Abstract

Based on the 3D seismic structure interpretation of Bohai Sea, combined with physical modeling of structure, structural style analysis and apatite fission track simulation, the structural characteristics and genetic mechanism of the Cenozoic strike-slip faults in Bohai Sea were investigated. The results show that Tanlu strike-slip fault experienced three stages of strike-slip activities in the Cenozoic,and the transition from left-lateral strike to right-lateral strike-slip was completed at the end of the fourth member of the Shahejie Formation. The strike-slip faults in the Bohai Sea have the characteristics of multi-stage and multi-strength stress superposition. According to the superimposed forms of different strengths, different properties and different ratios, they can be divided into three major genetic types, stretch-slip superimposed, stretch-extrusion superimposed and extrusion-slip superimposed, and fifteen typical structure patterns. Affected by multiple changes in the direction and rate of subduction of the Cenozoic Pacific plate, the difference between the Cenozoic extension and the strike-slip in the Bohai Sea area leads to the diversity of the fault system and the zoning of the depression structure. According to superimposition features of faults, the Bohai Sea area can be divided into the Liaoxi S-type weak strike-slip zone, Liaodong braided strong strike-slip zone, Boxi conjugated medium strike-slip zone, Bodong brush structure medium strike-slip zone and Bonan parallel strong strike-slip zone. These zones differ in oil and gas accumulation features.

Key words： strike-slip fault; superimposition characteristic; genetic mechanism; Tanlu fault; Bohai Bay Basin; Bohai Sea; physical modeling of structure

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