Article
Energy & Fuels
Yilun Dong, Youzhi Hao, Detang Lu
Summary: Multi-stage hydraulic fracturing is crucial for horizontal shale gas well development. The commonly-used cumulative flowback amount is not a good indicator for flowback situation. A new flowback indicator is proposed, based on field data and a shale gas flow model, which can be predicted using engineering parameters, geological parameters, and well operation parameters.
Article
Chemistry, Multidisciplinary
Sulaiman A. Alarifi
Summary: This study provides a comprehensive overview and analysis of the productivity of 1216 recently abandoned multi-stage hydraulically fractured horizontal wells from five shale formations in the United States. The research utilized two decline curve analysis (DCA) methods to match actual production data, resulting in accurate production forecasts using limited early production data. By developing universal decline parameters and conducting hindcasting, the study offers insights into the production behaviors and key performance indicators of similar wells from different shale formations.
APPLIED SCIENCES-BASEL
(2021)
Article
Energy & Fuels
Dong Kangxing, Li Qiaoer, Liu Wei, Zhao Xinrui, Zhang Shanren
Summary: Horizontal well volume fracturing is crucial for efficient shale reservoir development, with perforation being a basic requirement. A numerical model was established for spiral perforation hydraulic fracture propagation in near well bore horizontal wells, revealing lower initiation pressure for vertical perforation and easier energy release, leading to the formation of 1-2 major fractures. The optimal hole density is suggested to be 8 P/m, with significant uneven fracture development observed at densities higher than 8 P/m.
Article
Thermodynamics
Wenrui Shi, Chaomo Zhang, Shu Jiang, Yong Liao, Yuanhui Shi, Aiguo Feng, Steven Young
Summary: This study analyzes the pressure-boosting stimulation pattern and prediction method in the Fuling shale gas field, finding that this pattern can improve gas transmission capacity, maintain production, and increase recovery. The Blasingame analysis method can effectively predict production changes over the next decade. The research results provide valuable guidance for improving gas recovery in the Fuling and similar shale gas fields.
Article
Geosciences, Multidisciplinary
Huijun Wang, Lu Qiao, Shuangfang Lu, Fangwen Chen, Zhixiong Fang, Xipeng He, Jun Zhang, Taohua He
Summary: A new gas production prediction methodology based on GPR and CNN was proposed to achieve rapid optimization. By sensitivity analysis and experimental design, a gas production model was developed, achieving satisfactory prediction performance and maximizing NPV while determining optimal parameters.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Energy & Fuels
Minxuan Li, Liang Cheng, Dehua Liu, Jiani Hu, Wei Zhang, Kuidong Li, Jialin Xiao, Xiaojun Wang, Feng Zhang
Summary: By conducting big data analysis studies on fracturing data, optimal fracturing parameters were determined, providing engineers with new ideas for fracturing scheme design.
Article
Energy & Fuels
Liang Xue, Shao-Hua Gu, Xie-Er Jiang, Yue-Tian Liu, Chen Yang
Summary: An ensemble-based optimization method (EnOpt) is proposed to optimize the design of hydraulically fractured horizontal wells in shale gas reservoirs. The method aims to maximize the net present value (NPV) by predicting cumulative shale gas production through a simulation model. The results show significant improvements in optimizing design parameters and increasing NPV.
Article
Energy & Fuels
HanYi Wang, Harold McGowen, Mukul M. Sharma
Summary: This study introduces a unified approach to transient analysis, combining pressure transient analysis (PTA) and rate transient analysis (RTA), to estimate formation parameters and infer formation pore pressure by analyzing production data in a single superposition plot. It also discusses the calibration of long-term bottom-hole pressure with short-term measurements.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Thermodynamics
Faling Yin, Yonghai Gao, Heen Zhang, Baojiang Sun, Ye Chen, Dongzhi Gao, Xinxin Zhao
Summary: Two successful trials in the South China Sea have shown that low-permeability hydrate reservoirs have great potential for commercial exploitation. By evaluating different depressurization schemes, it was found that step-wise depressurization and cycling depressurization can improve production capacity to varying degrees. The study also highlighted the importance of considering both production efficiency and reservoir stability when developing low-permeability hydrate reservoirs.
Article
Thermodynamics
Jiaxin Shao, Lijun You, Na Jia, Yili Kang, Mingjun Chen, Xiaowen Lei
Summary: This study reveals the benefit of using salt crystals as a proppant to alleviate stress sensitivity in shale reservoirs. The microstructure analysis of salt crystals explains their compressive strength caused by structural differences. An innovative strategy of using proppants and salt crystals to support hydraulic and natural fractures is suggested for enhancing shale gas production.
Article
Multidisciplinary Sciences
Shengling Jiang, Qinghua Zhou, Yanju Li, Rili Yang
Summary: This paper discusses the fracability of shale reservoirs in the HD1 well through various methods. The results show that the Gufeng-Dalong Formation in the well has organic-rich shale, favorable for fracture development. However, the presence of shale bedding fractures has a negative impact on fracture generation and should be considered in fracturing design.
SCIENTIFIC REPORTS
(2023)
Article
Energy & Fuels
Rongli Xu, Tiankui Guo, Zhanqing Qu, Huanpeng Chen, Ming Chen, Jianchun Xu, Hangyu Li
Summary: The study shows that parameters such as fracturing fluid temperature, injection rate, and cluster spacing have a significant impact on the reservoir and fracture temperature, especially during the production and shut-in stages.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Rongli Xu, Tiankui Guo, Zhanqing Qu, Huanpeng Chen, Ming Chen, Jianchun Xu, Hangyu Li
Summary: The study investigated the impact of different parameters on formation temperature after injecting low-temperature fracturing fluid into a high-temperature reservoir, revealing that saturation changes due to fluid filtration have a significant impact on temperature variations. Imbibition accelerates fluid filtration, and high-pressure fracturing improves near-well zone permeability. Higher injection temperature, conductivity, lower Young's modulus, and pumping rate enhance heat transfer efficiency.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Geosciences, Multidisciplinary
Hongsha Xiao, Man Chen, Cui Jing, Huiyan Zhao, Keren Wang
Summary: This study utilizes micro-seismic data and discrete fracture model to characterize the geometry and boundary characteristics of fractured wells with complex fracture network in shale gas reservoir. By establishing a comprehensive seepage mathematical model, the production performance of fractured horizontal wells can be accurately predicted and the production system can be optimized.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Energy & Fuels
Atheer Dheyauldeen, Huda Alkhafaji, Dheiaa Alfarge, Omar Al-Fatlawi, Mofazzal Hossain
Summary: This study analyzed the linear flow data in unconventional gas wells and provided guidance on estimating parameters such as fracture half-length using analytical methods and correction techniques. The results showed that different methods and correction techniques have different accuracy in estimating fracture half-length under different conditions.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
