Vertical structure and dominating factors of sand body during Late Triassic Chang 9 time of Yanchang Formation in Ordos Basin, NW China

2015 ◽  
Vol 22 (4) ◽  
pp. 1405-1418
Author(s):  
Xiong Ding ◽  
Jing-shan Chen ◽  
Xiu-cheng Tan ◽  
Dan Lin ◽  
Zi-hao Zhao ◽  
...  
Keyword(s):  
Vertical Structure ◽  
Ordos Basin ◽  
Late Triassic ◽  
Yanchang Formation ◽  
Nw China ◽  
Sand Body ◽  
Chang 9 Time

Paleogeographic framework and provenance features during Late Triassic Chang 9 time of the Yanchang Formation, Ordos Basin, China

2014 ◽  
Vol 8 (9) ◽  
pp. 6731-6743 ◽  
Author(s):  
Xiong Ding ◽  
Jingchun Tian ◽  
Jingshan Chen ◽  
Jingli Yao ◽  
Xiuqin Deng ◽  
...  
Keyword(s):  
Ordos Basin ◽  
Late Triassic ◽  
Yanchang Formation ◽  
Chang 9 Time

scholarly journals Soft-sediment Deformation Structures and Sand Body Architecture in the Chang 6 Oil Member of the Upper Triassic Yanchang Formation, Southwestern Ordos Basin, China

2019 ◽  
Vol 23 (2) ◽  
pp. 119-126 ◽  
Author(s):  
Qingshao Liang ◽  
Jingchun Tian ◽  
Feng Wang ◽  
Xiang Zhang
Keyword(s):  
Ordos Basin ◽  
Upper Triassic ◽  
Seismic Events ◽  
Soft Sediment ◽  
Delta Front ◽  
Yanchang Formation ◽  
Sand Body ◽  
Sediment Deformation ◽  
The Ordos Basin ◽  
Sand Bodies

Soft-sediment deformation (SSD) structures of the Upper Triassic Yanchang Formation are laterally widespread in the Ordos Basin. In the Huachi-Qingyang (H-Q) area of the Ordos Basin, the Chang6 oil member of the Upper Triassic Yanchang Formation is among the most significant Mesozoic oil-bearing strata. It is characterized by the development of reservoir sand bodies. During the depositional evolution of the Chang6 oil member, SSD structures induced by paleo-seismic events developed in the H-Q area in the middle of the basin. The SSD structures developed in the sand bodies of the Chang6 oil member are mainly ball-and-pillow structures, fold structures, sand dikes, irregular convolute stratifications and synsedimentary faults. The architecture of the sand bodies resulted from paleo-seismic events and gravity slumping and mainly include two types of structures: 1) SSD structures driven by paleo-seismic events with normal sedimentation (delta front sand body) (SN-SSD) and 2) SSD structures driven by paleo-seismic events with turbidites (formed by delta-front slumping and re-distribution due to seismic action) (ST-SSD). As a consequence, genetic models of the sand bodies formed by different sedimentation processes are established.

scholarly journals Well logging evaluation of Triassic Chang 7 Member tight reservoirs, Yanchang Formation, Ordos Basin, NW China

2015 ◽  
Vol 42 (5) ◽  
pp. 667-673 ◽  
Author(s):  
Chaoliu LI ◽  
Changxi LI ◽  
Yuting HOU ◽  
Yujiang SHI ◽  
Changsheng WANG ◽  
...  
Keyword(s):  
Ordos Basin ◽  
Well Logging ◽  
Yanchang Formation ◽  
Nw China ◽  
Tight Reservoirs

The Structural Characteristics and Distribution of Sand Body of the Layer 7 of YanChang Formation in Ordos Basin

2014 ◽  
Vol 628 ◽  
pp. 360-365
Author(s):  
Qi Qi Lv ◽  
Shun She Luo ◽  
Lin Jing Li ◽  
Rong Dai ◽  
Yu Dong Li
Keyword(s):  
Depositional Environment ◽  
Structural Characteristics ◽  
Ordos Basin ◽  
Sedimentary Facies ◽  
Research Area ◽  
Uniform Thickness ◽  
Yanchang Formation ◽  
Genetic Types ◽  
Sand Body ◽  
Pelvic Shape

The tight sand in the layer 7 of YanChang Formation, Ordos Basin major develops braided river delta and gravity flow deposits. In this paper, based on previous studies on lake pelvic shape, provenance and hydrodynamic, the sand body in the research area has been systematically studied through core observation, logging data, and sedimentary theory. Various genetic types of sedimentary sand body are developed in this area, mainly as delta deposition, sandy debris flow deposits, turbidites (classic turbidites). We can identify 6 kinds of sand vertical combination type, they are the superimposed sand body (A-type), thick and uniform thickness sand body (B type), thin and uniform thickness sand body (C-type), up thinning sand body (D-type), thickening up sand body (E-type) , thick and thin interbed sand body (F-type). The 6 types mainly controlled by sedimentary facies. The A-type sand body mainly developed in the delta depositional environment, the B type sand body is visible both in the delta and slope belt, while the D-type, E-type, F-type sand body are mainly developed in the deep lake. The distribution of sand body in the plane is zonal pattern.

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