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| Distribution of shallow water delta and the genesis of thick layer sand bodies of Chang 82 sub-member in the Triassic Yanchang Formation, Longdong Area, Ordos Basin |
| LIU Hanlin1,2, QIU Zhen1, XU Liming3, WANG Fengqin4, TONG Qiang5, LIN Jiahao6, YIN Shuai4, WANG Wenqiang7 |
1. PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China;
2. School of Earth and Space Sciences, Peking University, Beijing 100871, China;
3. PetroChina Changqing Oilfield Company, Xi’an 710021, China;
4. College of Geosciences and Engineering, Xi’an Shiyou University, Xi’an 710065, China;
5. State Key Laboratory of Continental Dynamics/Department of Geology, Northwest University, Xi'an 710069, China;
6. No.3 Gas Production Plant, PetroChina Changqing Oilfield Company, Wushenqi 017300, China;
7. State Key Laboratory of Petroleum Resources and Prospecting, College of Geosciences, China University of Petroleum (Beijing), Beijing 102249, China |
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Abstract Based on the cores from 47 wells and logging data of 130 wells, the main types of sand bodies in the shallow water delta of the Chang 82 sub-member in the Triassic Yanchang Formation, Longdong Area, Ordos Basin were comprehensively analyzed, the distribution characteristics of sand bodies more than 20 m thick were identified, and the genetic types of the thick sand bodies were sorted out. In this region, thick-bed sand bodies can be divided into two types by shape and position: type 1 is the sand body in wide strip and is distributed between the average high water mark and the average low water mark; type 2 is distributed on both sides of the average low water mark and is in irregular lump shape. Based on the principle of the volume distribution of sediments and the change rule of accommodation space, the genetic models of two types of deep-bed sand bodies in the Chang 82 sub-member are high-capacity stacked distributary channel sand body model and low-capacity spatial overlay compound sand body model, respectively.
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Received: 06 May 2020
Published: 16 September 2020
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LIU Hanlin,QIU Zhen,XU Liming, et al. Distribution of shallow water delta and the genesis of thick layer sand bodies of Chang 82 sub-member in the Triassic Yanchang Formation, Longdong Area, Ordos Basin[J]. Petroleum Exploration and Development, 0, (): 20201209-20201209.
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| URL: |
| http://www.cpedm.com/EN/ OR http://www.cpedm.com/EN/Y0/V/I/20201209 |
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