Article
Energy & Fuels
Anirudh Bardhan, Sushipra Vats, Deepak Kumar Prajapati, Darshan Halari, Shivanjali Sharma, Amit Saxena
Summary: This research study introduces the novel application of Mesoporous Nano-Silica (MNS) to enhance water-based drilling fluid's inhibitive, rheological, and fluid loss characteristics. The experimental findings reveal that MNS can substantially improve the thermal properties of water-based drilling fluids, maintaining rheological characteristics and drastically reducing fluid loss while imparting some inhibitive properties. Incorporating macro-sized particles and MNS nano-particles into water-based drilling fluids can enhance its rheological properties, reduce filtrate loss, and improve shale inhibition characteristics.
GEOENERGY SCIENCE AND ENGINEERING
(2024)
Article
Energy & Fuels
Muhammad Shoaib Anwar, Mohammad Mahtab Alam, Meraj Ali Khan, Amr S. Abouzied, Zakir Hussain, V. Puneeth
Summary: In this study, a mathematical model using fractional derivatives is proposed to address the viscoelastic flow problem. The control/freedom of the flow mechanism is achieved by varying the fractional derivatives. Simulation results show that velocity, temperature, and concentration change with the variation of fractional order derivatives. Moreover, with greater relaxation times, these parameters remained at a lower level. The proposed model can help avoid costly trials in the chemical and polymer casting industries.
GEOENERGY SCIENCE AND ENGINEERING
(2024)
Article
Energy & Fuels
Omar K. Mohammed-Sajed, Paul W. J. Glover, Flyah H. Al-Khatony, Richard E. Ll Collier
Summary: The diagenetic history of the Butmah Formation is complex and affected by various processes, including fracturing control. This study combines microscopic analysis, core plug and well log analyses to understand the diagenetic and fracturing control that created the final pore system of the formation. The new method developed in this study allows for the estimation of reservoir properties of carbonate reservoirs, even in the absence of core samples.
GEOENERGY SCIENCE AND ENGINEERING
(2024)
Article
Energy & Fuels
Chen Wang, Xuhong Li, Xiaoliang Cheng, Zhigang Chen, Tao Wang, Xing Zhang, Xiaoyu Dong, Xiaowu Yang, Fangfang Dai, Kang Zhang
Summary: In this study, physically bonded and chemically bonded sustained release tracers were prepared and their release characteristics were discussed at different temperatures and salinities. The results showed that temperature and salinity had a positive correlation with the release rate and cumulative release of the tracers, and the chemically bonded tracer exhibited better controlled release compared to the physically bonded one.
GEOENERGY SCIENCE AND ENGINEERING
(2024)
Article
Energy & Fuels
Fabian J. Antinao Fuentealba, Gonzalo Blanco, Leandro N. Bianchi, Jose L. Otegui, Gustavo L. Bianchi
Summary: This article analyzes the influence of crack depth and confining pressure on the critical stress intensity factor of Vaca Muerta carbonate rich shale rocks. The experimental results show that tests carried out at well-bottom pressures lead to a significant increase in rock toughness, and increasing confining pressure results in a decrease in the size of the tensile stressed zone and the formation of compressive deviatoric stresses.
GEOENERGY SCIENCE AND ENGINEERING
(2024)
Article
Energy & Fuels
Yuzuo Liu, Wanzhong Shi, Kun Yuan, Ren Wang, Xiaofeng Xu, Xiaoming Zhang, Luheng Bai, Qian Feng, Kurt O. Konhauser
Summary: This study investigates the organic matter accumulation mechanism in the Nabiao Formation of the Youjiang Basin, South China. The results show that the Chotec Event is more conducive to organic matter enrichment than the Kacak Event. Furthermore, oceanic upwelling and dysoxic conditions play important roles in the accumulation of organic matter.
GEOENERGY SCIENCE AND ENGINEERING
(2024)
Article
Energy & Fuels
Yaoli Shi, Baocheng Wu, Heng Wang, Yunfei Li, Ziping Liu, Changfu Xu, Jianhua Qin, Yingyan Li, Zhaojie Song, Hongxian Liu
Summary: The study investigates the mechanism and performance of CO2 Huff-n-puff technology in improving oil recovery in tight oil reservoirs through laboratory experiments and pilot tests. The results show that CO2 dissolving can reduce the oil viscosity and increase the dissolution factor, and the oil recovery factor can be effectively increased through Huff-n-puff cycles in fractured Lucaogou tight formation. This study provides valuable insights into the mechanism of CO2 EOR in tight oil reservoirs.
GEOENERGY SCIENCE AND ENGINEERING
(2024)
Article
Energy & Fuels
Can Cai, Quangong Xie, Tao Zhong, Yulong Zhao, Kangkang Fan, Yingfang Zhou, Liehui Zhang
Summary: In this study, a new thermal-fluid-mechanical (TFM) coupling method using PFC2D fish code is proposed to simulate the complex temperature, fluid, and mechanical coupling phenomenon in CO2 fracturing. The TFM coupling model is validated using an analytical solution, and the effects of injection fluid temperature, injection flow rate, in-situ stress, and formation temperature on reservoir temperature variation, pore pressure, and crack propagation are studied. The results show that the crack number and length increase with the temperature difference between fracturing CO2 and reservoir temperature, and the breakdown pressure is reduced with larger injection flow rate or temperature differences. In addition, the pore pressure and heat play significant roles in preventing fracture initiation and propagation in certain directions. This study provides a novel method to simulate the complex TFM coupling phenomenon and enhances our understanding of CO2 fracturing.
GEOENERGY SCIENCE AND ENGINEERING
(2024)
Article
Energy & Fuels
Majid Fakhar, Payman Rezaee, Amir Karimian Torghabeh
Summary: This research focuses on studying the Earlier Triassic part of the gas field in the central Persian Gulf. By analyzing petrography, diagenesis processes, and sequence stratigraphy, the reservoir quality and production potential of gas reservoirs in the Kangan Formation were evaluated. The study identified various factors influencing reservoir properties, such as sedimentation processes, regional tectonics, and diagenesis processes. The research also divided the Earlier Triassic sequence into four zones and determined the reservoir potential of each zone.
GEOENERGY SCIENCE AND ENGINEERING
(2024)
Article
Energy & Fuels
Ning Xu, Shimin Zhang, Deli Jia, Qiang Chen, Benchun Yao
Summary: This paper investigates the performance and mechanism of the control valve spool in practical working conditions. The study finds that fit clearance and outlet shape have significant impacts on the spool performance and are closely related to the sticking phenomenon. These findings provide crucial theoretical guidance for the design of control valves.
GEOENERGY SCIENCE AND ENGINEERING
(2024)
Article
Energy & Fuels
L. P. Volpi, E. Cayeux, R. W. Time
Summary: This paper proposes a coupled fluid-structure model for drill-string vibrations to analyze the whirling dynamics and fluid forces in different configurations. The results show that the fluid acts both as a dissipative and excitatory force for the vibrations.
GEOENERGY SCIENCE AND ENGINEERING
(2024)
Article
Energy & Fuels
Adel Malallah, Ibrahim Sami Nashawi, Meshal Algharaib
Summary: This paper presents a method for analyzing constant-pressure drawdown test of infinite-conductivity fractured wells in bounded reservoirs. The method directly determines the fracture and reservoir parameters from the rate and rate derivative of the well test data. New equations describing different rectangular reservoirs and their flow regimes are presented. The method easily identifies various flow regimes based on the shape of the plotted data and the slope of each flow regime. The unique features of the slopes and intersection points of the flow regimes are used to determine important properties.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2023)
Article
Energy & Fuels
Junyi Zhang, Wenyu Song, Shenglai Guo, Yuhuan Bu, Huajie Liu, Mingzhong Li
Summary: In order to improve the accuracy of cementing quality evaluation for ultra-low density cement, a full-scale cementing quality evaluation model well group was constructed based on the real underground environment and the requirements for cementing quality and cement filling. The influence of factors such as logging time and cement density on cementing quality evaluation indicators was analyzed, and the results showed that the evaluation indicators of ultra-low density cement cementing quality are inversely correlated with cement density & logging time. The research results suggest that applying the ultra-low density cement slurry cementing quality evaluation model well group and verifying the ultra-low density cement cementing quality evaluation indicators can significantly improve the accuracy and pertinence of cementing quality evaluation.
CHEMISTRY AND TECHNOLOGY OF FUELS AND OILS
(2023)
Article
Energy & Fuels
M. Yu. Dolomatov, A. I. Bystrov, R. I. Khairudinov, N. A. Zhuravleva, I. R. Khairudinov, K. V. Sadykova
Summary: The article discusses stochastic mathematical models for thermolysis kinetics of complex oil-like hydrocarbon systems. It finds that the thermolysis process is collective, nonergodic, and nonstationary. Based on an example study, it shows that the kinetics of gaseous products release in thermolysis are better described by stationary kinetics models, while the yield of residues and distillates is better described by nonstationary kinetics models.
CHEMISTRY AND TECHNOLOGY OF FUELS AND OILS
(2023)
Article
Energy & Fuels
Emad A. Eysa, Bassem S. Nabawy, Ashraf Ghoneimi, Ahmed H. Saleh
Summary: This study aims to investigate the microfacies and diagenetic features of the Abu Madi clastic reservoir in the Nile Delta region, and their impact on reservoir characteristics. By integrating petrographical studies and conventional data, the researchers divided the reservoir into different types based on mineral composition and diagenetic features, and examined their influence on reservoir quality and hydraulic flow zones.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2023)
Article
Energy & Fuels
Xuhong Wang
Summary: This study analyzed the rockburst hazards caused by tectonic stress in three hard coal mines in Datong Coalfield. A stress analysis model was built and the roadway in Xinzhouyao Coal Mine was examined in detail. The findings showed that local tectonic stress could cause roof bedding separation and subsequent rockbursts in the coal wall. Numerical simulations confirmed that stress concentration was likely to occur in the coal-rock masses under tectonic stress, leading to rockbursts. Moreover, a large horizontal stress gradient near the roadway coal wall increased the likelihood of rockbursts.
CHEMISTRY AND TECHNOLOGY OF FUELS AND OILS
(2023)
Article
Energy & Fuels
Jijun Zhang, Meng Cai, Na Wei, Haibo Liang, Jianlong Wang
Summary: This paper investigates the use of machine learning methods for gas-liquid two-phase flow pattern identification. Four machine learning models were tested and trained using a sample database, and the results showed that Random Forest had the highest prediction accuracy while Naive Bayes had the lowest. The machine learning method demonstrated varying levels of recognition ability for different flow patterns.
CHEMISTRY AND TECHNOLOGY OF FUELS AND OILS
(2023)
Article
Energy & Fuels
Yingjian Zhang, Yong Wang, Shuguang Gao, Gang Liu, Yang Zhou, Yuxin Wang, Shouxi Wang
Summary: This paper investigates the key influencing factors and changing rules of foam stability in the process of foam-assisted liquid lifting. Through experiments and field tests, methods to improve foam stability are found, and the optimal injection amount of foaming agent is calculated, reducing the dosage. This work provides guidance for the production of natural gas fields.
CHEMISTRY AND TECHNOLOGY OF FUELS AND OILS
(2023)
Article
Energy & Fuels
Sen Zheng, Ruifei Wang, Jin Chai, Jia Zhao, Weiwei Ba
Summary: Thin oil layers have become a focus in the exploration of oil and gas resources. The use of horizontal well technology is necessary to improve production in low porosity and low permeability reservoirs. However, the implementation of horizontal wells in thin interbed reservoirs is challenging, and conventional seismic data has limitations in predicting these reservoirs. This study demonstrates the effectiveness of prestack geostatistical inversion technology in improving reservoir prediction and guiding the design and monitoring of horizontal well trajectories.
CHEMISTRY AND TECHNOLOGY OF FUELS AND OILS
(2023)
Article
Energy & Fuels
Yinbo Xu, Pingchang Sun, Yuanji Li, Shuqing Yao, Jiaqiang Zhang, Zhaojun Liu, Feng Li, Lihua Tong
Summary: The study of sequence stratigraphy in mudstone and oil shale strata is crucial for analyzing the quality of unconventional oil and gas reservoirs. This research focuses on the Eocene thick organic-rich fine-grained sediments in the Fushun basin and investigates the sequence stratigraphy using organic geochemical data and the Delta logR model. The results demonstrate a good linear correlation between the values measured in the lab and those predicted by the Delta logR model. Further analysis reveals 21 parasequences in mudstones, which can be classified into two cycles.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2023)
