Geological adaptability of deep CBM fractured horizontal well in SLN block

Frontiers in Earth Science

Earth Science

Yue Wu¹  Weilin Yuan²  Xudong Guo²  Yutong Fu²  Haibo Zheng²  Xianqing Wang²  Ruosi Zhao²  Chunlin Ma³  Shiyong Gou³  Zhidan Xu⁴ 

[1] No. 11 Oil Production Plant, PetroChina Changqing Oilfield Company, Qingyang, China;Sanya Institute of South China Sea Geology, Guangzhou Marine Geological Survey, China Geological Survey, Sanya, China;Shaanxi Tiancheng Petroleum Technology Co., Ltd., Xian, China;Shiwen Software Co., Ltd., Xian, China;

关键词: deep CBM;    fractured horizontal well;    numerical simulation;    geological suitability;    sln block;   

DOI  :  10.3389/feart.2023.1127995

 received in 2022-12-20, accepted in 2023-01-23,  发布年份 2023

来源: Frontiers

【 摘 要 】

The buried depth of the main coal beds in SLN Block is more than 1,500 m, and the gas content of the coal beds is high. However, the coal beds are generally in a high geostress environment, the permeability of the coal beds is generally low, and the development effect of conventional fractured straight wells is poor. Fractured horizontal well is an important technical means to improve the development effect of low permeability coalbed methane, but the investment cost is high. To reduce the investment risk of fractured horizontal wells, it is necessary to find out the gas production capacity and main control factors of the fractured horizontal wells, and determine the area suitable for the development of fractured horizontal wells. In the area with permeability higher than 0.28 md and gas content higher than 12.8 m3/t, the daily gas production capacity of fractured horizontal well is 16,450–21500 m3/d, and the development effect is good. The research results are of great significance to quickly evaluate the adaptability of fractured horizontal wells.

【 授权许可】

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Copyright © 2023 Fu, Yuan, Xu, Zhao, Wu, Zheng, Wang, Guo, Gou and Ma.