Article
Engineering, Petroleum
Rida Elgaddafi, Ramadan Ahmed, Hamidreza Karami, Mustafa Nasser, Ibnelwaleed Hussein
Summary: This article presents a new hole cleaning model for optimizing wellbore cleanout in horizontal and inclined wells. The model calculates the critical transport velocity in conventional and fibrous water-based fluids, taking into consideration the impact of fiber and bed shear stress variation. The accuracy of the new model is validated with published measurements, demonstrating improved performance compared to existing models in predicting wellbore cleanout.
SPE DRILLING & COMPLETION
(2021)
Article
Materials Science, Multidisciplinary
Mingzhi Yan, Xin Gao, Jun Qian, Xiaoyin Gao, Jilin Tang, Yuechen Wang, Yani Wang, Junchuan Tang, Liming Zheng, Kaicheng Jia, Fei Jia, Hongtao Liu, Guanghui Gao, Hailin Peng
Summary: Van der Waals homo-/heterostructures stacked by atomically thin two-dimensional materials have unique physical properties and outstanding device performance. However, bubbles at the interface commonly deteriorate material quality and limit the device size and design. In this study, a novel backside lamination method is proposed to fabricate bubble-free, centimeter-sized bilayer graphene films. The key factor is the dry lamination of the graphene layers by designing asymmetric transfer media. The resulting bubble-free bilayer graphene exhibits exceptional film characteristics and has potential for vdW homo-/heterostructures with bubble-free interfaces and uniform film features.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Engineering, Marine
Xuyang Guo, Yan Jin, Jingyu Zi, Jiaying Lin, Bolong Zhu, Qian Wen, Qi Jing
Summary: Sand production is a significant challenge in the exploitation of methane hydrates, affecting gas productivity. This study presents a numerical model that describes the coupled thermal-hydraulic-mechanical-chemical responses and sand production patterns during horizontal well depressurization in methane-hydrate-bearing sediments. The results show the spatial and temporal evolution patterns of multi-physical fields and highlight the sensitivity of gas and sand production rates to various parameters.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Munavara Farha, Diana Carolina Guio-Perez, Jesper Aronsson, Filip Johnsson, David Pallares
Summary: Dual fluidized bed systems are vital in future energy systems that require the cycling of solids between different atmospheres. This study examines four experimental techniques to measure the horizontal flow of solids in bubbling conditions: integral and differential mass accumulation, thermal tracing, and magnetic solids tracing.
Article
Geochemistry & Geophysics
Zongyu Lu, Baocheng Wu, Jiangang Shi, Chuanming Xi, Kai Wei
Summary: This paper establishes a numerical simulation method for cuttings migration characteristics in horizontal wells, revealing the distribution law and migration characteristics of cuttings in horizontal well sections, and fitting an engineering prediction model for cuttings bed height. The analysis shows that increasing drilling fluid density, displacement, and drill pipe speed is conducive to borehole cleaning and reducing the height of cuttings bed. Within the range of normal construction parameters, the error of the horizontal cuttings height prediction model is less than 10%, meeting engineering needs.
Article
Energy & Fuels
Abdul Asad, Abeeb A. Awotunde, Mohammad S. Jamal, Qinzhuo Liao, Abdulazeez Abdulraheem
Summary: Horizontal wells are crucial in enhancing hydrocarbon recovery from thin reservoirs, but sand production may occur in weakly consolidated formations, leading to issues such as wellbore instability and production loss. Erosion due to high-velocity gas flow in open-hole horizontal wells can impact gas production rate and well flowing pressure.
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2021)
Article
Geochemistry & Geophysics
Zongyu Lu, Baocheng Wu, Jiangang Shi, Chuanming Xi, Kai Wei
Summary: Cuttings accumulation in horizontal drilling is a major issue affecting drilling performance. This study established a numerical simulation method to investigate the migration characteristics and influencing factors of cuttings in horizontal wells. The research developed an engineering prediction model for cuttings bed height and analyzed the sensitive factors for borehole cleaning. The results showed that drilling speed, cuttings density, and drill pipe eccentricity hinder borehole cleaning, while increasing drilling fluid density, displacement, and drill pipe speed improve borehole cleaning.
Article
Construction & Building Technology
Chunzhi Mao, Xinxin Zhang, Fenqiang Li, Dongyu Wu, Shaohe Zhang
Summary: Air reverse circulation (RC) drilling is popular in tunnel drilling, but poor cutting transport efficiency can cause issues such as stuck pipes and severe bit wear. This study used computational fluid dynamics simulation to analyze the impact of various parameters on cutting transport in a drill pipe. The results showed that air velocity had a limited impact on transport efficiency, the optimal cutting concentration was approximately 20%, and factors like ROP and cutting diameter were correlated with transport efficiency.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2023)
Article
Engineering, Mechanical
Ronald E. Vieira, Farzin Darihaki, Siamack A. Shirazi
Summary: Horizontal wells are crucial for maximizing hydrocarbon recovery, but the deposition of sand particles can lead to blockages and reduced production. Therefore, studying sand deposition and erosion in intermittent flow is essential for predicting production and ensuring pipeline safety.
Article
Geochemistry & Geophysics
Bo Cai, Rui Gao, Chunming He, Jin Chen, Ning Cheng, Tiancheng Liang, Guifu Duan, Chuanyou Meng, Haifeng Fu, Haoyu Zhang
Summary: This study analyzes the effective stress characteristics of proppants during multi-stage hydraulic fracturing in horizontal wells and considers the geomechanics and long-term production characteristics of reservoirs. The results show that the stress on proppants is influenced by geological factors as well as injection volume, spacing, fluid type, displacement, and post-fracture management. Increasing injection intensity, reducing fracture spacing, using low-viscosity fracturing fluid, and implementing a reasonable flowback system can enhance the effective conductivity of proppants. Furthermore, the analysis of nearly 300 horizontal wells reveals that the effective stress of proppants in horizontal wells is only 50-60% of that in vertical wells, indicating a different proppant selection criterion and the potential to replace ceramsite proppant with quartz sand to reduce costs and increase efficiency.
Article
Energy & Fuels
Xin Huang, Ruihan Zhang, Man Chen, Yulong Zhao, Hongsha Xiao, Liehui Zhang
Summary: Hydraulic fractures and natural fractures have significant impacts on the production performance of fractured horizontal wells in shale gas reservoirs. The complexity of hydraulic fractures is more controllable than the connectivity of natural fractures, and increasing the complexity of hydraulic fractures is key to improving hydraulic fracturing effectiveness.
Article
Environmental Sciences
Jerzy Zawisza, Iwona Radosz, Jaroslaw Biegowski, Leszek M. Kaczmarek
Summary: The paper presents experimental and theoretical studies on the transport of water-sand mixtures with small amounts of cohesive fractions. The experiments were conducted for sand alone and with clay as cohesive admixture. The study proposed a model to determine the influence of cohesive admixtures on the transport of sand fractions.
Article
Chemistry, Multidisciplinary
Jiangtao Li, Xiaofeng Zhou, Xibao Liu, Abdumalik Gayubov, Sultanov Shamil
Summary: Tight gas reservoirs with microscale pores and fractures have a significant impact on the productivity of gas wells. The influence of microscale gas flow on the well testing model of fractured horizontal wells has not been studied systematically. In this paper, the coupling influence mechanism of multicomponent gas effect-fracture geometry characteristics is explained, and a seepage model coupling the flow in the fracture and the flow in the gas reservoir is established. Additionally, an unsteady pressure analysis model for fractured horizontal wells in tight gas reservoirs is developed.
Article
Nanoscience & Nanotechnology
Mohan Wang, Zheyuan Gu, Beibei Li, Jingyi Zhang, Lu Yang, Xianyu Zheng, Faming Pan, Jiacai He
Summary: This study prepared and characterized chitosan-hydroxyapatite microsponges using a combination of microfluidic emulsion, freezing, and in situ thawing methods. The microsponges showed a porous structure and demonstrated good bioactivity and osteogenic differentiation potential. These microsponges have the potential to be used as bone substitute materials for bone tissue engineering.
INTERNATIONAL JOURNAL OF NANOMEDICINE
(2022)
Article
Energy & Fuels
Jintao An, Jun Li, Honglin Huang, Gonghui Liu, Hongwei Yang, Geng Zhang, Sainan Chen
Summary: Compared with conventional drilling methods, the method of drilling horizontal wells with a slim hole (HW-SH) has advantages such as high productivity, environment-friendliness, and low costs. However, the existing models cannot accurately predict the cutting transport law in the annulus of the HW-SH. In this study, a computational fluid dynamics (CFD) pipeline model is established, and a one-dimensional (1D) two-layer model is developed to accurately predict cutting transport and annular pressure loss.
ENERGY SCIENCE & ENGINEERING
(2023)
Article
Energy & Fuels
Testi Sherif, Ramadan Ahmed, Subhash Shah, Mahmood Amani
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2015)
Article
Energy & Fuels
Rida Elgaddafi, Adarsh Naidu, Ramadan Ahmed, Subhash Shah, Shokrollah Hassani, Samuel O. Osisanya, Arild Saasen
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2015)
Article
Energy & Fuels
Omotayo Omosebi, Himanshu Maheshwari, Ramadan Ahmed, Subhash Shah, Samuel Osisanya, Ashok Santra, Arild Saasen
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2015)
Article
Construction & Building Technology
Omotayo Omosebi, Himanshu Maheshwari, Ramadan Ahmed, Subhash Shah, Samuel Osisanya, Shokrollah Hassani, Gunnar DeBruijn, Winton Cornell, Dave Simon
CEMENT & CONCRETE COMPOSITES
(2016)
Article
Energy & Fuels
Rida Elgaddafi, Ramadan Ahmed, Shokrollah Hassani, Subhash Shah, Samuel O. Osisanya
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2016)
Article
Energy & Fuels
Ming Tang, Ramadan Ahmed, Ruchir Srivastav, Shiming He
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2016)
Article
Engineering, Chemical
Rida Elgaddafi, Ramadan Ahmed, Fred Growcock
Article
Energy & Fuels
Shiming He, Ruchir Srivastav, Ming Tang, Ramadan Ahmed
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2016)
Article
Energy & Fuels
Ming Tang, Ramadan Ahmed, Shiming He
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2016)
Article
Energy & Fuels
Testi Sherif, Ramadan Ahmed, Subhash Shah, Mahmood Amani
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2016)
Article
Energy & Fuels
Omotayo Omosebi, Himanshu Maheshwari, Ramadan Ahmed, Subhash Shah, Samuel Osisanya
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2017)
Article
Energy & Fuels
Yahya Hashemian, Mengjiao Yu, Stefan Miska, Siamack Shirazi, Ramadan Ahmed
JOURNAL OF CANADIAN PETROLEUM TECHNOLOGY
(2014)
Article
Energy & Fuels
Oyindamola Obisesan, Ramadan Ahmed, Mahmood Amani
Summary: The impact of salt on the drainage behavior of aqueous foams was investigated in this study. It was found that NaCl-containing foams showed decreased drainage with lower foam quality, while CaCl2-containing foams did not exhibit a clear trend with foam quality. The effect of salt content on foam rheology was minimal.
Article
Energy & Fuels
Ravi Singh, Ramadan Ahmed, Hamidreza Karami, Mustafa Nasser, Ibnelwaleed Hussein
Summary: This study analyzed the turbulent flow of drilling fluid in inclined wells using the Computational Fluid Dynamics (CFD) technique, establishing a correlation for optimizing hole cleaning and managing downhole pressure. The prediction results were validated and showed a discrepancy of up to 10% when compared with simulation data.
Proceedings Paper
Engineering, Petroleum
Testi Sherif, Ramadan Ahmed, Subhash Shah, Mahmood Amani
PROCEEDINGS OF THE ASME 34TH INTERNATIONAL CONFERENCE ON OCEAN, OFFSHORE AND ARCTIC ENGINEERING, 2015, VOL 10
(2015)