| 郯庐断裂莱州湾段块体旋转效应及意义 |
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| 引用本文： | 邓辉,杨海风,李果营,郭轩,温宏雷.郯庐断裂莱州湾段块体旋转效应及意义[J].地球科学,2020,45(11):4176-4186. |
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| 作者姓名： | 邓辉 杨海风 李果营 郭轩 温宏雷 |
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| 作者单位： | 中海石油(中国)有限公司天津分公司渤海石油研究院, 天津 300459 |
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| 基金项目： | 国家重大科技专项2016ZX05024-003中海石油（中国）有限公司科技项目YXKY-2017-TJ-01 |
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| 摘 要： | 为探究郯庐断裂莱州湾段右行走滑活动的构造响应并约束其起始时期，以最新钻井资料和三维地震资料为基础，深入剖析研究区与右行走滑活动密切相关的构造-沉积响应.结果显示，双轨走滑右行活动开始后，其夹持块因发生顺时针方向的被动旋转而产生差异应变（伸展或挤压）效应.在叠加区域伸展作用的背景下，伸展效应促进沉降作用，致使先存凸起区加速沉降并演变为洼陷区，先存洼陷区沉降幅度更大，现今均为富烃洼陷；挤压效应则抑制沉降作用，致使先存凸起区持续保持凸起状态，而先存洼陷区多沉降减缓甚至转为抬升，生烃潜力减小.综合地层残存信息及区域构造环境表明郯庐断裂带莱州湾段的右行走滑旋转效应最早始于沙三中段沉积时期.
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| 关 键 词： | 郯庐断裂 双轨走滑 旋转效应 差异应变 构造地质 |
| 收稿时间： | 2019-11-29 |
Block Rotation Effect and Its Significance of Tanlu Fault |
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| Abstract: | In order to explore the starting time of dextral strike slip of the Laizhou Bay segment of the Tanlu fault and its tectonic response, structural sedimentary responses closely related to right strike slip movement are studied in depth based on the latest drilling data and 3D seismic data. It is found that the clamped geological block rotated clockwise passively as soon as the double track strike slip began its dextral strike slip, resulting in differential strain (extension or extrusion) effect. During a regional extensional background, subsiding would be promoted if the extension effect is produced, enlarging the subsidence area of the partial depression and changing the part of the uplift into the depression area, both proved to be hydrocarbon rich depressions. If the extrusion effect is produced, subsiding would be inhibited, resulting in the slowdown, even shrinking, uplifting and eroding of the settlement of some depression areas, and the potential of hydrocarbon generation decreases or even disappears, and convex areas still maintain a state of protruding. The comprehensive information of stratigraphic residuals and regional tectonic environment indicate that tectonic responses to the dextral strike slip of the Tanlu fault (Laizhou Bay segment) simultaneously appeared when the E2s3M was deposited. |
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