| 尼日尔三角洲盆地泥收缩构造发育特征及对沉积的控制 |
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| 引用本文： | 于水,李涛,胡望水,成瀚,赵红岩.尼日尔三角洲盆地泥收缩构造发育特征及对沉积的控制[J].海相油气地质,2017,22(4). |
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| 作者姓名： | 于水 李涛 胡望水 成瀚 赵红岩 |
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| 作者单位： | 1. 中海油研究总院;2. 长江大学 |
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| 基金项目： | 国家科技重大专项"非洲、中东重点勘探区油气地质评价及关键技术研究" |
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| 摘 要： | 泥收缩构造是发育在尼日尔三角洲盆地深水区的典型构造样式,属重力滑脱冲断构造,主要构造类型有冲断裂、塑性泥构造及相关褶皱和正断裂。基于地震地质解释,结合构造发育史分析,认为泥收缩构造主要受塑性泥构造控制,在中新世托尔托纳(Tortonian)晚期开始活动,中新世墨西拿期(Messinian)—上新世赞克勒期(Zanclean)达到最强,之后构造活动逐渐减弱,但至今仍在活动。通过古构造恢复,结合沉积展布分析,认为中新世托尔托纳晚期沉积开始受构造活动控制,托尔托纳阶上部及以上地层具有明显的同沉积特征,泥收缩构造相关的冲断裂上升盘厚度明显小于下降盘厚度,褶皱两翼的地层厚度明显厚于中间背斜顶部的地层厚度。
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| 关 键 词： | 尼日尔三角洲盆地 泥收缩构造 构造特征 构造演化 |
Contractional Structure in Muds:Pattern,Evolution, and the Control on the Deposition of Niger Delta Basin |
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| Yu Shui,Li Tao,Hu Wangshui,Cheng Han,Zhao Hongyan.Contractional Structure in Muds:Pattern,Evolution, and the Control on the Deposition of Niger Delta Basin[J].Marine Origin Petroleum Geology,2017,22(4). |
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| Authors: | Yu Shui Li Tao Hu Wangshui Cheng Han Zhao Hongyan |
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| Abstract: | The contractional structure in muds, which is a typical tectonic pattern of the gravitational decollment thrust structure in the deepwater area of Niger Delta Basin, is mainly composed of thrust faults, plastic mud structures and associated folds and normal faults. Based on the interpretation of seismic data, it is considered that the contractional structure is mainly controlled by plastic mud structure. On the tectonic history, the contractional structure began to form in the late Tortonian of the Miocene, and in the Messianian-Zanclean reached the strongest, then the tectonic activity gradually weakened, but still active. Based on the analysis of paleo-structure restoration and sedimentary system, it is believed that the late Tertonian tectonic activity begin to control the sediments. The upper part of the Tertonian and its overlying strata are of obvious syn-deposition. As to the thrust fault, the thickness of hanging wall is clearly smaller than that of footwall, and as to the associated fold, the thickness of the strata of wings is larger than that of the top of anticline. |
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| Keywords: | Contractional structure in muds Structural feature Structural evolution Niger Delta Basin |
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