Evolution Features and Controlling Factors of Depositional Systems of Paleogene-Neogene in Maxian Area, the Northern Margin of Qaidam Basin

2011 ◽  
Vol 71-78 ◽  
pp. 3224-3228
Author(s):  
Rui Zhang ◽  
You Liang Ji
Keyword(s):  
Qaidam Basin ◽  
Low Frequency ◽  
Sedimentary Facies ◽  
River Delta ◽  
Lake Basin ◽  
Frequency Change ◽  
Braided River ◽  
Northern Margin ◽  
Core Logging ◽  
Depositional Systems

According to the comprehensive detailed analysis of data such as, drilling core, logging and outcrop section, four kinds of sedimentary facies, namely, proluvial fan, braided river, shallow water braided river delta, and oxidative lacustrine, are recognized in Paleogene-Neogene of Maxian area in the northern margin of Qaidam basin. The evolution features of the sedimentary systems were analyzed in details: at the early forming stage of the lake basin (Paleocene-Eocene), proluvial fan -braided river depositional systems were developed in the study area. At the middle flourishing stage of the lake basin (Oligocene-Middle Pliocene), the main sedimentary systems were braided river-shallow braided river delta-oxidative lacustrine. Then the study area was dominated by proluvial fan-braided river-oxidative lacustrine depositional systems in the regression stage of the lake basin (Late Pliocene). The range of the depositional systems in low frequency sedimentary cycle was controlled by the multi-cycle tectonic uplifts and squeezing action of mountains around the study area. Paleoclimate and ancient landform controlled the high frequency change of the lacustrine level and supplied an advantage for the development of shallow braided river delta and oxidative lacustrine facies.

scholarly journals The Sedimentary Facies and Evolution Characteristics of the Middle and Deep Strata in the Nanpu No. 3 Structural Area

2021 ◽  
Vol 9 ◽  
Author(s):  
Hui Zhang ◽  
Zhiqin Lan ◽  
Xiaoyan Li ◽  
Xinglong Huang
Keyword(s):  
Shallow Lake ◽  
Oil And Gas ◽  
Sedimentary Facies ◽  
Seismic Profile ◽  
Tectonic Activity ◽  
Lake Basin ◽  
Braided River ◽  
Break Zone ◽  
Sedimentary System ◽  
Deep Strata

In this study, due to the inconsistencies in the understanding of the sedimentary types in the second section of the Dongying Formation (Ed2) and the third section of the Shahejie Formation (Es3) in the middle and deep strata of Nanpu No. 3 structural area, the depositional characteristics of the deep braided river delta, fan delta, deep-water slump turbidite fan, and coastal and shallow lake in the Nanpu No. 3 structural area were examined in-depth. The investigations were begun based on the descriptions and observations of core samples obtained from eight cored wells in the study area, in combination with seismic, well logging, and rock ore data. The results revealed that the sources of the material in the study area originated from the Shaleitian salient in the southwest direction. It was determined that the fan deltas and the shallow lake sedimentary system had developed during the SQ1 sequence and SQ2 sequence periods. The braided river deltas and the shallow lake and turbidite sedimentary system with multi-stage superposition had developed during the SQ3 to SQ7 sequence periods, and their distribution range had been controlled by the structural background of the gentle slope zone of the lake basin. On that basis, a sequence deposition filling model controlled by a slope break zone in the middle and deep strata of the Nanpu No. 3 structural area was established in this study starting from the typical seismic profile, in which such factors as the tectonic activity characteristics, lake basin boundary shape, water depths, and so on, were comprehensively considered. The goal of this research investigation was to provide beneficial information for oil and gas explorations in similar areas.

Research of Sequence Stratigraphic Models of Jiufotang Formation, Lower Cretaceous, the Luxi Sag, the Kailu Basin

2011 ◽  
Vol 356-360 ◽  
pp. 2941-2949
Author(s):  
Yang Li ◽  
Qing Bin Xie ◽  
Xiao Min Zhu ◽  
Fen Liu
Keyword(s):  
Seismic Data ◽  
Lower Cretaceous ◽  
Sedimentary Facies ◽  
River Delta ◽  
Braided River ◽  
Sequence Stratigraphic ◽  
Meandering River ◽  
River Deltas ◽  
Lacustrine Facies ◽  
Order Sequence

With comprehensive utilization of drilling, logging and seismic data, research was conducted on the sequence stratigraphic models of Jiufotang Formation, Lower Cretaceous in the Luxi Sag, Kailu Basin. It was revealed that Jiufotang Formation could be divided into one three-order sequence, which including lowstand systems tract (LST), transgressive systems tract (TST), highstand systems tract (HST) and regressive systems tract (RST). Within the sequence, it developed five types of sedimentary facies, which were nearshore subaqueous fan, braided river delta, meandering river fan, turbidite fan and lacustrine facies, respectively. The LST mainly developed nearshore subaqueous fan, the TST mainly developed meandering river deltas while the HST and RST mainly developed meandering river delta, braided river delta and nearshore subaqueous fan. In addition, turbidite fan developed in all four systems tracts. Two types of sequence stratigraphic models developed: short-axis model and long-axis model.

The Types of Sedimentary Facies and Rock Characteristics of Xujiaweizi Fault Depression in Songliao Basin

2013 ◽  
Vol 787 ◽  
pp. 717-720
Author(s):  
Cheng Zhi Liu ◽  
Xue Du ◽  
Xiao Zhou ◽  
Bo Li ◽  
Xi Liu
Keyword(s):  
Main Type ◽  
Sedimentary Facies ◽  
Songliao Basin ◽  
River Delta ◽  
Braided River ◽  
Delta Front ◽  
Braided Channel ◽  
Fan Delta ◽  
Sedimentary System ◽  
Lacustrine Facies

In the Shahezi Formation of Xujiaweizi fault depression in the Songliao Basin mainly tow sedimentary system is developed: the Xudong gentle slope belt and Xuxi fault zone systems. However, this area is little studied as there have been only limited efforts in exploration. Based on the latest drilling, outcrop data, description of core observation and laboratory microscope identification, it has been concluded that four mainly sedimentary facies are developed in this area: braided river delta, fan delta, lacustrine facies and sublacustrine fan. The subaqueous distribute channel is the main type of the fan delta front while the braided channel is the main type of the braided river delta. A number of clastic, sandstone and mudstone are developed in these two types of sedimentary facies. We can use it to make further study of dividing into micro-facies.

Sequence Stratigraphic Analysis of Badaowan Formation in Dishuiquan Area, Junggar Basin

2012 ◽  
Vol 616-618 ◽  
pp. 56-59 ◽  
Author(s):  
Zhe Wang ◽  
Zhen Kui Jin ◽  
Gui Zai Li
Keyword(s):  
Lacustrine Sediments ◽  
Junggar Basin ◽  
Sedimentary Facies ◽  
River Delta ◽  
Braided River ◽  
Transgressive System Tract ◽  
Sequence Stratigraphic ◽  
Sedimentary Microfacies ◽  
System Tracts ◽  
System Tract

In the light of the principle and method of sequence stratigraphy, the sequence stratigraphic framework of Badaowan formation in the Dishuiquan area was established. The results show that the sequence of Badaowan formation is one and half, including 5 system tracts. The whole experiences the process of retrogradation, progradation and then retrogradation again. There develop three types of sedimentary facies such as braided river, braided river delta and lakes, five types of sedimentary subfacies and 10 types of sedimentary microfacies. Most of JSQ1 sequence lowstand system tract is braided rivers, the lacustrine transgressive system tract mainly develops shore-shallow lacustrine sediment and most of highstand system tract is braided river delta; lowstand systems tract of JSQ2 sequence mainly develops braided river delta, most of the lacustrine transgressive system tract is shore-shallow lacustrine sediments.

Sedimentary Characteristics in Zhalainuoer Group in Cano Depression Hailaer Basin

2013 ◽  
Vol 652-654 ◽  
pp. 2515-2519
Author(s):  
Ying Hua Yu ◽  
Hong Qi Yuan ◽  
Zi Xue Guo
Keyword(s):  
Sequence Stratigraphy ◽  
Seismic Data ◽  
Sedimentary Facies ◽  
Sedimentary Characteristics ◽  
Core Logging ◽  
Depositional System ◽  
Depositional Systems

Based on the theory of sequence stratigraphy, sequence stratigraphy framework of is established in this paper by comprehensively search of core, logging and 3-D seismic data. Zhalainuoer group in Cano Depression is divided into 5 3rd-order sequences: Sq1、Sq2、Sq3、Sq4、Sq5 from down to up. Based on the division and comparison of sequence formation, the sedimentary facies and the depositional system are proposed to study in the paper, and the main depositional systems are detailed explained. The distribution of these depositional systems is controlled by the sequence framework.

EVOLUTION OF SEDIMENTARY FACIES AND PALEOENVIRONMENT DURING THE LATE QUATERNARY IN WANQINGSHA AREA OF THE PEARL RIVER DELTA

2010 ◽  
Vol 29 (6) ◽  
pp. 35-42
Author(s):  
Jianhua WANG ◽  
Linglong CAO ◽  
Xiaojing WANG ◽  
Xiaoqiang YANG ◽  
Jie YANG ◽  
...  
Keyword(s):  
Pearl River Delta ◽  
Late Quaternary ◽  
Sedimentary Facies ◽  
River Delta ◽  
Pearl River ◽  
The Pearl River Delta ◽  
The Pearl River
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