| 南海北部湾盆地北部凹陷涠洲组层序地层格架及特征 |
| |
| 引用本文： | 杜振川,魏魁生.南海北部湾盆地北部凹陷涠洲组层序地层格架及特征[J].沉积学报,2001,19(4):563-568. |
| |
| 作者姓名： | 杜振川 魏魁生 |
| |
| 作者单位： | 1.河北建筑科技学院 河北邯郸 056038; |
| |
| 摘 要： | 通过地震、测井和岩心等资料及重矿物变化规律的综合分析,识别出沉积基准面旋回产生的层序界面,在北部湾盆地北部凹陷涠洲组划分出 3个超层序 9个三级层序,并研究了各层序发育的特征及沉积体系构成。盆地充填超层序的发育受控于中长周期基准面变化,层序地层单元在中长周期基准面旋回中所处位置不同,其地层厚度、沉积体系的类型和分布均有显著的不同。通过分析对比确认主要控油层序为超层序 1的层序 2和 3,主要储层赋存于低水位和水进体系域。以基准面旋回为基础,论述了层序与油气储盖组合的关系。
|
| 关 键 词： | 北部湾盆地 可容纳空间 层序 沉积体系 |
| 文章编号： | 1000-0550(2001)04-0563-06 |
| 收稿时间： | 2000-11-23 |
| 修稿时间： | 2000年11月23日 |
Sequence Stratigraphic Framework and Its Characteristics of the Weizhou Formation in North Sag of Beibuwan Basin |
| |
| DU Zhen chuan,WEI Kui sheng.Sequence Stratigraphic Framework and Its Characteristics of the Weizhou Formation in North Sag of Beibuwan Basin[J].Acta Sedimentologica Sinica,2001,19(4):563-568. |
| |
| Authors: | DU Zhen chuan WEI Kui sheng |
| |
| Institution: | 1.Hebei Institute of Architectural Science and Technology, Handan Hebei 056038;2.China University of Geosciences, Beijing 100083 |
| |
| Abstract: | According to the comprehensive analysis of the data of well logging, core, seismic and change of heavy minera, under the guide of the thought and methodology of high resolution sequence stratigraphy, and identification of sequence boundary generated by base level cycle, the sequence stratigraphic framework in Weizhou Formation has been established,and 3 super sequence, 9 sequence have been recognized . Sequence characteristics and sedimentary system formation have been investigated. Spatially, based on the study of depositional environment in the unit of chronological sequence, the system tracts and depositional system were traced. Temporally, the authors have studied the basin evolution with every sequence and faulting action on depositional filling. The development of basin fill supper sequences in Weizhou Formation is controlled by middle term base level cycle change. Because place difference of sequence stratigraphic unit in middle term base level cycle, stratigraphic thickness ,classification and distribution of sedimentary system make obvious difference. Lowstand system tract(LST) developed, there had mostly developed braided river delta, alluvial fan, slop fan, multiple fan, fan deltas and near shore subfan sediments in middle term base level cycle fall rise early stage. Water transgressive system tract(TST) dformed, there mostly developed fine grain lake faces sediments in middle term base level cycle rise stage. Highstand system tract(HST) formed, there mostly developed shallow lacustrine, fluvial delta and fan deltas sedimentary system in middle term base level cycle late stage. It could be concluded that, in Weizhou Formation, most oil bearing formations are controlled by sequence 2 and sequence 3 of supper sequence 1, and reservoirs are mostly sandbody in LST and TST. The seal and structure jointly made the composite traps. The important commercial accumulation of oil and gas were formed in North sag of Beibuwan basin. |
| |
| Keywords: | Beibuwan basin accumulation sequence sedimentary system |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《沉积学报》浏览原始摘要信息 |
| 点击此处可从《沉积学报》下载免费的PDF全文 |
|
