Development technologies for Triassic Chang 7 shale oil in Ordos Basin: A case study of Qingcheng Oilfield, NW China

被引：0
作者：
He Y. [1 ]
Xue T. [1 ,2 ,3 ]
Li Z. [1 ,2 ,3 ]
Bai X. [1 ,2 ,4 ]
Fan J. [1 ,2 ,3 ]
Zhang X. [1 ,2 ,3 ]
机构：
[1] PetroChina Changqing Oilfield Company, Xi'an
[2] National Engineering Laboratory for Exploration and Development of Low Permeability Oil & Gas Fields, Xi'an
[3] Research Institute of Exploration & Development, PetroChina Changqing Oilfield Company, Xi'an
[4] Oil & Gas Technology Research Institute, PetroChina Changqing Oilfield Company, Xi'an
来源：
Shiyou Kantan Yu Kaifa/Petroleum Exploration and Development | 2023年 / 50卷 / 06期
关键词：
development effect; development technology; Ordos Basin; Qingcheng Oilfield; shale oil;
D O I：
10.11698/PED.20230248
中图分类号：
学科分类号：
摘要：
The reservoirs in the seventh member of the Triassic Yanchang Formation (Chang 7 Member) in the Qingcheng Oilfield of the Ordos Basin are characterized by thin sandbody, tight rocks, high heterogeneity, low formation pressure coefficient, and complex geomorphology. Through the efforts in the stages of exploration, appraisal, pilot testing and development, a series of key technologies have been formed, including "sweet spot" optimization, differentiated three-dimensional well deployment, fast drilling and completion of large-scale horizontal well cluster, intensively-staged volume fracturing in long horizontal well, and optimization of rational production system. Furthermore, a production organization mode represented by factory-like operations on loess platform has been implemented. Application of these technologies has enabled to significantly improve the single-well production of the Qingcheng Oilfield, reduce the investment cost, and realize a large-scale and beneficial development at a full cost below $55 per barrel. In 2022, the annual production of Chang 7 shale oil in the Ordos Basin reached 221×104 t, accounting for 70% of the annual shale oil production of China. The practice of development technologies in the Qingcheng Oilfield provides valuable references for efficient development of continental shale oil. © 2023 Science Press. All rights reserved.
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页码：1245 / 1258
页数：13
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