Article
Energy & Fuels
Yongmao Hao, Fan Yang, Jian Wang, Mingwu Fan, Shuxia Li, Shiwei Yang, Chuanming Wang, Xinhai Xiao
Summary: This paper investigates the impact of multilateral well exploitation technique on natural gas hydrates, utilizing simulation to study the mechanisms and changes in temperature, pressure, and hydrate concentration during gas production. Results show that the multilateral well technique significantly enhances the production capacity of hydrates.
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
Ziming Wang, Qilin Wang, Zhiqiang Fan, Wei Wei, Mengxin Li, Yanfeng Wang, Xuehua Huang, Yongchen Song, Dayong Wang
Summary: This paper summarizes classical and popular permeability models associated with hydrate dissociation and demonstrates an equivalency and replaceability relationship between different permeability models through systematic numerical sensitivity analysis, providing a basis for simplifying the selection of permeability models.
Article
Energy & Fuels
Feifei Wang, Zizhen Wang, Di Zhang, Zhenqing Wang
Summary: This study established a thermo-hydraulic-chemistry coupling method to simulate methane production from a natural gas hydrate reservoir using hydraulic fracturing and horizontal wells. The results showed that the combination of hydraulic fracturing and horizontal wells significantly increased gas production. Factors such as fracture length, fracture number, and fracture interval had a significant impact on stimulation efficiency. The study also found that the fracture section area was the most important geometry factor in hydraulic fracturing.
Article
Engineering, Environmental
Sijia Wang, Zucheng Cheng, Qingbin Liu, Pengfei Lv, Junchen Lv, Lanlan Jiang, Yongchen Song
Summary: This study investigated the microscale mechanism of hydrate formation and dissociation, identifying different crystal structures and local reformation during the dissociation process. The findings provide insights into the phase transition of hydrates and efficiency of methane hydrate dissociation.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Petroleum
Yingli Xia, Tianfu Xu, Yilong Yuan, Xin Xin, Huixing Zhu
Summary: Long-term gas production through depressurization from a vertically heterogeneous hydrate reservoir is technically feasible, but the production efficiency is generally modest. The hydrate dissociation region is significantly affected by reservoir heterogeneity, and depressurization production results in increased shear stress and vertical compaction in the hydrate reservoir.
Article
Thermodynamics
Yajie Bai, Matthew A. Clarke, Jian Hou, Yongge Liu, Nu Lu, Ermeng Zhao, Hongzhi Xu, Litao Chen, Tiankui Guo
Summary: The existence of solid hydrate in porous media greatly reduces the relative permeability, which hinders the development of hydrate reservoirs. Reservoir reconstruction measures, such as inducing fractures around production wells, are necessary to increase gas production. This study establishes numerical models to verify the effectiveness of induced fractures in promoting depressurization production of natural gas hydrates. The calculation model obtained in this study can measure the rationality and economy of the induced fracture depressurization method for promoting hydrate development.
Article
Physics, Multidisciplinary
Haopeng Zeng, Yu Zhang, Lei Zhang, Zhaoyang Chen, Xiaosen Li
Summary: Depressurization combined with brine injection is a potential method for improving the production efficiency of natural gas hydrate fields and avoiding secondary formation of hydrate. The experimental results show that high-water production reduces the final gas recovery, while increasing NaCl concentration only effectively promotes gas production rate in the early stage. The injection of NaCl solution decreases the lowest temperature in sediments during hydrate production and increases heat transfer.
Article
Energy & Fuels
Qing-Ping Li, Xin Lv, Wei-Xin Pang, Hai-Yuan Yao, Yang Ge, Jun-Ao Wang
Summary: This study investigates the impact of permeability on the decomposition characteristics of hydrate-bearing sediments using a laboratory model. Results show that cores with low permeability experience faster pressure reduction, while cores with high permeability exhibit quicker gas production rates.
Article
Energy & Fuels
Jing-Chun Feng, Bo Li, Xiao-Sen Li, Yi Wang
Summary: The study found that increasing depressurizing rate leads to a decrease in gas production rate, but increasing depressurizing rate is beneficial for hydrate reformation during this period. The optimal depressurizing rate is obtained when the fluid velocity is in accordance with the heat transfer vector in the hydrate reservoir.
Article
Energy & Fuels
Xingxun Li, Ming Liu, Qingping Li, Weixin Pang, Guangjin Chen, Changyu Sun
Summary: This study investigated the formation and depressurization-induced dissociation behaviors of methane hydrate in porous media using a high-pressure transparent micro-packed bed reactor. The results revealed the effect of methane bubble dispersion on hydrate formation, observed hydrate reformation during depressurization, and demonstrated the impact of fluid extraction rate on hydrate reformation. The dissociation process of hydrate and fluid migration phenomena in the pore spaces were also visualized.
Review
Energy & Fuels
Kunlin Ma, Dongliang Li, Deqing Liang
Summary: The energy crisis has worsened in recent years and additional energy access channels are needed due to the current global economic environment and rising mining costs. Previous studies have shown that natural gas hydrate reservoirs (NGHRs) contain a significant amount of natural gas resources. However, there are several issues associated with their safe and efficient exploitation. This study examines the properties and mining difficulties of NGHRs and reviews the stimulation scheme and research progress from three perspectives: hydraulic fracturing, burden sealing, and near-well reconstruction. The principles, advantages, and limitations of these schemes are compared, and factors influencing fracture initiation and development, as well as suitable fluids and materials for NGHR stimulation, are discussed. The study also summarizes the principles, current challenges, and future research prospects for reservoir stimulation, aiming to provide a reference for the future commercial exploitation of natural gas hydrates.
Article
Chemistry, Multidisciplinary
Junpeng Han, Xiaolong Ma, Dongbin Pan
Summary: This study investigates the enhancement effects of multistage fractured horizontal well (MFHW) technology on gas production from clayey silt natural gas hydrate reservoirs. It is found that fractures provide a fast channel for gas and water flow, increasing the contact area between the well and the reservoir and improving gas production rate.
Article
Energy & Fuels
Qingping Li, Shuxia Li, Shuyue Ding, Zhenyuan Yin, Lu Liu, Shuaijun Li
Summary: In this study, a THMC numerical model was developed to simulate the gas productivity and reservoir stability of natural gas hydrate reservoirs. The simulation results showed that CO2 exchange promotes the dissociation of NGH and increases the production of gas and water while reducing reservoir subsidence.
Article
Engineering, Chemical
Xuke Ruan, Xiao-Sen Li
Summary: This study investigated the surface area of methane hydrate during dissociation in porous media by comparing experimental results with numerical simulations. Two conceptual models were proposed based on the morphology of hydrate, which showed the importance of hydrate dissociation surface area for gas production. The results indicated the significant impact of hydrate dissociation surface area on cumulative gas production, with different models performing better at different hydrate saturations.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Mechanics
Sufia Khatoon, Jyoti Phirani, Supreet Singh Bahga
Article
Geochemistry & Geophysics
Rahul Gogia, Raman Singh, Paul de Groot, Harshit Gupta, Seshan Srirangarajan, Jyoti Phirani, Sayan Ranu
INTERPRETATION-A JOURNAL OF SUBSURFACE CHARACTERIZATION
(2020)
Article
Engineering, Chemical
Deepshikha Singh, Shantanu Roy, Harish Jagat Pant, Jyoti Phirani
Summary: The study introduces a new method using tracer to quantify the solid-liquid interfacial area in a porous medium. Experimental results show that there is a difference in the interfacial area between oil and water in the porous medium at the same residual saturation, which can be used for wettability quantification.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Energy & Fuels
Syed Haider Abbas Rizvi, Anil Yadav, Jyoti Phirani, Vikram Singh
Summary: This study discusses the removal of asphaltene from inorganic silica surfaces using hydrodynamic forces. The results show that large aggregates of asphaltene can be removed from the surface with an increase in flow rates. The study also discusses the possible mechanism of asphaltene removal from the surface based on hydrodynamic force calculations.
Article
Engineering, Multidisciplinary
Sufia Khatoon, Jyoti Phirani, Supreet Singh Bahga
Summary: The article introduces the use of polynomial chaos expansions (PCEs) as a replacement for the Markov chain Monte Carlo (MCMC) method in Bayesian inference for history matching. Through this method, accurate estimation of model parameters can be achieved with significantly fewer reservoir simulations.
INVERSE PROBLEMS IN SCIENCE AND ENGINEERING
(2021)
Article
Energy & Fuels
Neelam Choudhary, Jyoti Phirani
Summary: Reservoir simulations are crucial for predicting long-term gas production from gas hydrate reservoirs. Various well placements and configurations were explored in this study to analyze gas production strategies for an oceanic, unconfined, class-2, gas hydrate reservoir. The effectiveness of depressurization and the necessity of warm water injection were demonstrated, with injector placement playing a critical role in gas production behavior. Additionally, the reservoir porosity and layering significantly affect gas recovery and production behavior.
Article
Energy & Fuels
Syed Haider Abbas Rizvi, Shrimali Jonit Bharatbhai, Shivam Gupta, Jyoti Phirani, Vikram Singh
Summary: In this study, asphaltene removal from silica surface using shear forces of aqueous media in a parallel plate channel was investigated. The results showed that the removal efficiency of asphaltene varied with different pH and surfactant conditions in the aqueous media. Cationic surfactant was found to significantly improve the removal efficiency, while anionic surfactant was ineffective.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Deepshikha Singh, Shantanu Roy, Harish Jagat Pant, Jyoti Phirani
Summary: Wettability is a key factor in flow through porous media, affecting Darcy-scale flow parameters by influencing fluid-solid interfacial area. Quantifying this area provides a way to measure wettability. Experimental results show that different saturations, wettability, and flow conditions have an impact on solid-liquid interfacial area. Oil as the residual phase leads to an increase in solid-water interfacial area with increasing water saturation for water-wet and mixed-wet cases, but a decrease for oil-wet case.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Thermodynamics
Sufia Khatoon, Jyoti Phirani, Supreet Singh Bahga
Summary: We propose a fast Bayesian inference framework for solving inverse heat conduction problems. The framework combines polynomial chaos expansions and dimensionality reduction based on Karhunen-Loeve expansion to generate efficient surrogate models. We demonstrate the potential of this approach using three model problems for heat flux estimation.
APPLIED THERMAL ENGINEERING
(2023)
Article
Mechanics
Shabina Ashraf, Yves Meheust, Jyoti Phirani
Summary: This study proposes a model based on interacting capillaries to predict the spontaneous imbibition in quasi-two-dimensional porous media. The breakthrough time, wetting fluid saturation, and leading meniscus are determined by the capillaries' radii distribution and spatial arrangement. The model provides accurate predictions for the position in time of the saturating front and the leading visible front.
Article
Engineering, Chemical
Deepshikha Singh, Shantanu Roy, Harish Jagat Pant, Jyoti Phirani
Summary: The liquid-solid contact area in a porous medium is difficult to characterise due to its heterogeneity and large-scale interaction. Two-tracer experiments are used to quantify the liquid-solid contact area and its relationship with different factors. When the organic phase is immobile, increasing flow rate does not significantly change the residual saturation, but the water-solid contact area increases due to corner flow. When both organic and aqueous phases flow, the relationship between water saturation and water-solid contact area depends on grain size.
CHEMICAL ENGINEERING SCIENCE
(2023)
Proceedings Paper
Engineering, Mechanical
Sufia Khatoon, Jyoti Phirani, Supreet Singh Bahga
PROCEEDINGS OF THE ASME/JSME/KSME JOINT FLUIDS ENGINEERING CONFERENCE, 2019, VOL 5
(2019)
Proceedings Paper
Engineering, Mechanical
Aniket S. Ambekar, Shabina Ashraf, Jyoti Phirani
PROCEEDINGS OF THE ASME/JSME/KSME JOINT FLUIDS ENGINEERING CONFERENCE, 2019, VOL 5
(2019)
Proceedings Paper
Engineering, Mechanical
Shabina Ashraf, Jyoti Phirani
PROCEEDINGS OF THE ASME/JSME/KSME JOINT FLUIDS ENGINEERING CONFERENCE, 2019, VOL 5
(2019)
Proceedings Paper
Engineering, Mechanical
Neelam Choudhary, Jyoti Phirani
PROCEEDINGS OF THE ASME/JSME/KSME JOINT FLUIDS ENGINEERING CONFERENCE, 2019, VOL 5
(2019)