Cenozoic transtensional structural styles and their controls over hydrocarbon accumulation in Dongying Depression

Zhang Weizhong; Zha Ming; Zhang Yunyin; Chen Cheng; Qu Zhipeng; Zhang Lin; Gao Ping

doi:10.11743/ogg20170605

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Cenozoic transtensional structural styles and their controls over hydrocarbon accumulation in Dongying Depression
Vol. 38, Issue 6, Pages: 1052-1058(2017)
Online First：28 December 2017，

Published：2017
DOI： 10.11743/ogg20170605
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DOI：

Zhang Weizhong, Zha Ming, Zhang Yunyin, et al. Cenozoic transtensional structural styles and their controls over hydrocarbon accumulation in Dongying Depression[J]. 2017, 38(6): 1052-1058. DOI： 10.11743/ogg20170605.

摘要

在精细构造解释的基础上，采用地层切片、地震相干等技术手段，系统解剖扭张构造基本特征，明确扭张构造样式及其分布规律，并建立了扭张构造的控藏模式。研究表明，东营凹陷新生代共发育王家岗、八面河、高青、青西以及郝现等11个扭张构造带。依据断层平面、剖面组合特征及地层变形特征，对这11个扭张构造进行了分类研究，该地区主要发育帚状-半花状，雁列-树形花状及侧接-卷心式花状3种类型的复合构造样式。帚状-半花状扭张构造分布于盆地的陡坡带，雁列-树形花状扭张构造分布于斜坡带，侧接-卷心式花状扭张构造分布于凹陷的中央隆起带。这3种扭张构造样式控制了不同的圈闭类型，并形成了帚状两段式、雁列分割式以及侧接弧形式的成藏模式。

Abstract

Various methods including stratigraphic slicing and seismic coherence are adopted based on fine interpretation of seismic data to analyze the styles and distribution patterns of transtensional structures and their controls over hydrocarbon accumulation in Dongying Depression.The results show that there are at least 11 transtensional structural belts

including Wang Jiagang

Ba Mianhe

Gaoqing

Qingxi

Haoxian and etc.They can be categorized into three types of compound structures according to the features of fault complexes on map and section and the characteristics of formation deformation there:the broom-half-flower transtensional structure

the en echelon-tree-shaped flower transtensional structure and the juxtaposed-curled flower transtensional structure.The first style is mostly found in the steep slope of the basin

the second one is mainly observed in the slope of the basin and the last style is distributed in the central uplift belt of the depression.The three styles controlled the trap types

and formed their own individual types of oil and gas accumulation.