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.

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.

scholarly journals Sequence stratigraphic analysis of the Surma Group in X Gas Field, Surma Basin, Bengal Delta

2019 ◽  
Vol 58 ◽  
pp. 39-52
Author(s):  
Afroza Parvin ◽  
A. S. M. Woobaidullah ◽  
Md Jamilur Rahman
Keyword(s):  
Tidal Flat ◽  
Transgressive System Tract ◽  
Gas Field ◽  
Depositional Sequences ◽  
Sequence Stratigraphic ◽  
Bengal Delta ◽  
Stratigraphic Framework ◽  
Facies Associations ◽  
Surma Group ◽  
System Tract

This study builds a high-resolution sequence stratigraphic framework for the Surma Group in the X Gas field. At first, electrofacies and depositional sequences were interpreted from wire line logs. Then, the field wide configurations of these sequences have been identified in seismic using reflection terminations (of flap, onlap, top lap and down lap relationship). Finally, wire line log and seismic interpretations were integrated to establish sequences stratigraphic framework in the Surma Group. Electrofacies analysis has revealed four major facies associations namely: (i) Bell shaped fining upward facies corresponds to retrogradational shoreface to tidal flat deposits, (ii) Funnel shaped coarsening upward facies corresponds to progradational shoreface to tidal flat, (iii) Cylindrical aggradational facies interpreted as stacked channel and (iv) Symmetrical or Bow shaped facies corresponds to heterolithic unit. The succession of Surma group of about 3100+ m has been divided into twelve depositional sequences. With exception of depositional sequence 1, 11 and 12, most of them are composed of three system tracts: sandy lowstand system tract, shaley transgressive system tract and heterolithic to shaley highstand system tract. Repetitive occurrence of incised valley, shoreface sand as well as tidal channel sand separated by transgressive system tract shelfal mud resulted in sand-shale alternation in the Surma Group. The lower depositional sequences (up to sequence-6) are shale dominated and equivalent to the Lower Surma Group. The upper six sequences are sand dominated, have more channel incisions and sequence boundary representing the Upper Surma Group

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.

scholarly journals Characteristics and controlling factors of glutenite reservoir rock quality of retrogradational fan Delta: A case study of the Upper Wuerhe Formation of the Mahu Sag, the Junggar Basin

2021 ◽  
pp. 014459872110189
Author(s):  
Yongping Ma ◽  
Xianwen Zhang ◽  
Linjun Huang ◽  
Guodong Wang ◽  
Han Zhang ◽  
...  
Keyword(s):  
Sedimentary Environment ◽  
Junggar Basin ◽  
Controlling Factors ◽  
Reservoir Rock ◽  
Rock Properties ◽  
Reservoir Rocks ◽  
Rock Quality ◽  
Fan Delta ◽  
System Tracts ◽  
System Tract

The glutenite reservoir rock of the fan delta facies is associated with a complex sedimentary environment and high heterogeneity, and by far the characteristics and controlling factors of the reservoir rock quality have not been well understood. By comprehensively investigating the lithofacies, petrology, physical properties and diagenesis of the Upper Wuerhe Formation of the Mahu Sag, the Junggar Basin, it is concluded that the Upper Wuerhe Formation develops three major groups of lithofacies, totally consisting of 11 sub-types, and reservoir rock properties of different lithofacies are greatly varied. This research shows that the lithofacies attributed to the tractive current and density current have well-sorted rock particles, low mud content, well-developed secondary dissolved pores, and thus high overall reservoir rock quality. On the contrary, the lithofacies based on debris flow and sheet flow, are observed with high mud content, suppressed development of intergranular and dissolved pores, and thus poor reservoir rock quality. The system tract controls the macro variation of the reservoir rock quality. The best quality is found in the highstand system tract, followed by those of the lake transgression and at last lowstand system tracts. The micro variation of the reservoir rock quality is determined by the mud content, rock particle size and dissolution. The muddy matrix mainly damages the pore connectivity, and presents the strongest correlation with permeability. The reservoir rock with concentrated particle sizes and well-sorted particles has quality better than those of reservoir rocks composed of excessively large or small particles. Dissolution effectively improves the storage capability of the reservoir rock, resulting in an average porosity increment by 4.2%.

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.

KAJIAN HUBUNGAN DIAGENESIS DAN SIKUEN STRATIGRAFI FORMASI NANGGULAN BERDASARKAN ANALISIS PETROGRAFI BATUPASIR

KURVATEK ◽  
2018 ◽  
Vol 3 (1) ◽  
pp. 71-82
Author(s):  
Wahyu Sasongko
Keyword(s):  
Transgressive System Tract ◽  
Highstand System Tract ◽  
System Tract

Proses diagenesis yang terjadi pada batuan memiliki hubungan yang erat dengan konsep sikuen stratigrafi. Proses diagenesis awal (eogenesis) yang terbentuk pada suatu batuan dipengaruhi oleh posisi stratigrafi batuan tersebut dalam tataan sikuen stratigrafi. Eogenesis tersebut dapat diteliti dengan menggunakan data petrografi batupasir mengenai proses diagenesis yang terdapat pada batuan, dan juga dengan melihat posisi batuan dalam tataan sikuen stratigrafi. Formasi Nanggulan yang tersingkap di Kulon Progo, Yogyakarta merupakan salah satu formasi yang dengan beberapa interval litologi batupasir. Analisis mengenai sikuen stratigrafi Formasi Nanggulan telah diteliti sebelumnya dengan menggunakan analisis batuan inti. Studi lebih lanjut mengenai Formasi Nanggulan bertujuan untuk mengetahui karakteristik batupasir dan proses diagenesisnya, serta mencari hubungan antara proses diagenesis dan sikuen stratigrafi. Penelitian dilakukan dengan menggunakan analisis petrografi dari data batuan inti dan singkapan permukaan dengan tujuan untuk mengetahui hubungan antara diagenesis dan sikuen stratigrafi pada batupasir Formasi Nanggulan.Berdasarkan analisis petrografi terhadap diagenesis pada Formasi Nanggulan, dapat dikonfirmasi bahwa Formasi Nanggulan terdiri dari 3 system tract yaitu lowstand system tract (LST), transgressive system tract (TST), dan highstand system tract (HST). Tahapan proses diagenesis yaitu eogenesis, mesogenesis dan telogenesis telah mempengaruhi Formasi Nanggulan. Karakteristik diagenesis pada Formasi Nanggulan bervariasi sesuai dengan system tract dan marker batas sikuen pada tataan sikuen stratigrafi. Berdasaran penelitian ini dapat diketahui bahwa sikuen stratigrafi Formasi Nanggulan dapat dikonfirmasi dengan data diagenesis.

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