石油与天然气地质 ›› 1987, Vol. 8 ›› Issue (1): 90-98.doi: 10.11743/ogg19870112

• 论文 • 上一篇    下一篇

冀中坳陷下第三系构造-沉积相特征

田崇鲁1, 李德同1, 刘铁铨2, 江宏涛2, 吴振明3, 卢松年3   

  1. 1. 华东石油学院北京研究生部;
    2. 石油工业部物探局解释中心;
    3. 武汉地质学院北京研究生部
  • 收稿日期:1985-10-07 修回日期:1986-03-22 出版日期:1987-03-25 发布日期:2012-01-16

CHARACTERISTICS OF TECTONIC-SEDIMENTARY FACIES IN THE LOWER TERTIARY OF JIZHONG DEPRESSION

Tian Chonglu1, Li Detong1, Liu Tiequan2, Jiang Hongtao2, Wu Zhengming3, Lu Songnian3   

  1. 1. Beijing Graduate School, Huadong College of Petroleum;
    2. Interpretation Center of Geophysical Exploration Euneau, Ministry of Petroleum Industry;
    3. Beijing Graduate School, Wuhan College of Geology
  • Received:1985-10-07 Revised:1986-03-22 Online:1987-03-25 Published:2012-01-16

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摘要：

本文以构造-沉积相的概念,划分了冀中坳陷下第三系构造-沉积相的类型,论述了在次级构造因素控制下沉积相带在时间、空间上的分布规律。 冀中坳陷由东向西划分为三个构造-沉积相带。冀中坳陷的14个小凹陷,分属上述三带。由于次级构造因素的控制,文中提出8种不同类型的、各具特色的构造-沉积相。 根据凹陷的结构特征将其分为封闭式、半封闭式和非封闭式三种盆地结构类型。

Abstract:

Deposition is usually controlled by tectonic movements. The so-called tectonic-sedimentary facies is the sedimental facies that are controlled by various tectonic factors in different tectanic units and evolution stages. In the Jizhong Depression, the factors controlling the deposition include followings: 1. differential vertical movements and their strengths; 2. paleotopography is controlled by synsedimentary structures; 3. paleotopography is controlled by gravitational tectonic, and 4. lake level undulation resulted from the tectonic events. The tectonic unites of the Jizhong Depression are very clear in stripped distribution. As the basement uplifted gradually from west to east, the depo-center moved correspondingly. Accorrding to its characteristics, the depression might be divided into three tectonic belts, i.e. a stable subsident belt; an alternated belt of elevation and subsidence and the last one that subsided first and then uplifted. Correspondingly, there are three tectonic-sedimentary facies, i.e.,1. stable subsidence lake facies; 2. alternating fluvial-lake facies: and 3. flu-vial facies with first subsiding, soon elevating. On the tectonic unit of depression, there are six types of the tectonic-sedimentary facies: 1.shore-shallow lake facies of lake-depression; 2. deep-hemideep lake facies of lake-depression; 3. submarine fan of steep slopes or/and faulted scarps; 4. gravitative slumping along the steep faults; 5. subequeous fan on gentle slope; 6. delta facies on gentle slope. According to the structure of paleo-1ake basin, the depression might be divided into enclosed fault depression: semi-enclosed fault depression and nonenclosed fault depression. They correspond to three tectonic-sedimentary facies in the Jizhong Depression as stated above. The first two are favourable for hydrocarbon accumulation, but the last one is not.