Article
Energy & Fuels
Bo Meng, Zhaomin Li, Teng Lu, Liping Du, Yiping Wang, Xiaolin He, Yu Zhang
Summary: This study investigates the nitrogen foam-enhanced oil recovery in heavy oil reservoirs with bottom water through experimental observations and physical displacement experiments under simulated reservoir conditions. The results show that nitrogen foam flooding has the ability to improve oil recovery by increasing the sweep efficiency and enhancing the oil displacement effect. The optimal gas-liquid ratio and injection method have significant effects on the nitrogen foam flooding process.
Article
Energy & Fuels
E. Illarionov, P. Temirchev, D. Voloskov, R. Kostoev, M. Simonov, D. Pissarenko, D. Orlov, D. Koroteev
Summary: This paper introduces a unified approach to reservoir simulation and adaptation problems, utilizing a neural network model for forward pass and backward gradient propagation, combining model fitting and geological parameter adjustment into the same optimization problem. By utilizing real-world oilfield models and historical production rates, it demonstrates a significant acceleration in simulation speed.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Francis N. Nwabia, Juliana Y. Leung
Summary: This paper proposes an integrated approach for the history matching of hydraulically fractured reservoirs, aiming to calibrate stochastic reservoir models to both geologic and dynamic production data by adjusting fracture parameters with indicator-based probability perturbation method to reduce uncertainties.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Energy & Fuels
Cihan Alan, Murat Cinar
Summary: This paper presents a coupled reservoir/wellbore model that accounts for various effects and compares it with a commercial simulator. By using synthetic data and history-matching field applications, diagnostic characteristics of temperature transients can be identified, along with tracking model parameter sensitivities. The study finds that temperature transients can better reflect the properties of the near wellbore region.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Tomasz Tuczynski, Jerzy Stopa
Summary: Production forecasting using numerical simulation is standard in the oil and gas industry, but the uncertainty of the modeling outcome needs to be addressed. History-matching can reduce uncertainty for reservoirs with production data, but manual matching is time-consuming and generates only one deterministic realization. This paper describes the uncertainty quantification process for a gas-condensate reservoir using an ensemble-based approach and discusses ways to improve the efficiency of the algorithm and analyze the factors controlling modeling uncertainty.
Article
Engineering, Chemical
Chang-Wen Xiao, Xiao-Sen Li, Gang Li, Yang Yu, Yi-Fan Weng, Qiu-Nan Lv, Jian-Xing Yu
Summary: Hydrate technology is promising for water, energy, and environmental applications. This study established a new kinetic model for methane hydrate formation and validated its excellent performance. The new model incorporates hydrate pore-scale distribution and considers the aqueous phase surface area as the controlling factor for the reaction area. The results demonstrated the reliability and accuracy of the model in predicting and understanding hydrate formation kinetics in porous media.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Geochemistry & Geophysics
Tianhan Xu, Jian Wang, Wenfeng Lyu, Yu Zhang, Yuhao Lu
Summary: CO2 huff and puff technology is an effective method to enhance the recovery of shale reservoirs after fracturing, in which CO2 can be injected to effectively extract light components, and it reacts with minerals in the formation during the process.
Article
Energy & Fuels
Kai Liu, Weiyao Zhu, Bin Pan
Summary: A numerical compositional modeling investigation on hydrogen storage in a partially depleted shale gas reservoir in China demonstrates the feasibility of using shale gas reservoir as a promising option for large-scale hydrogen storage. The study shows that a high injection/withdrawal capacity can be achieved, CH4 production is inhibited, and cushion gas injection is beneficial to reducing H2 loss and enhancing H2 recovery.
Article
Thermodynamics
Rui Li, Bo-Jian Cao, Hong-Nan Chen, Xiao-Hui Wang, Yi-Fei Sun, Chang-Yu Sun, Bei Liu, Wei-Xin Pang, Qing-Ping Li, Guang-Jin Chen
Summary: Short production periods and high costs are obstacles for commercial exploitation of natural gas hydrates (NGHs). This study explores a method to prepare NGHs deposits with an underlying free gas layer and a hydrate layer on top, and conducts experiments to investigate its gas production characteristics. The results show that the temperature of the hydrate layer and the free gas layer exhibit different variations during gas production, and lower production pressure leads to higher gas production rate and recovery ratio. Setting the wellbore at the underlying free gas layer enhances hydrate decomposition and improves gas production efficiency.
Article
Geochemistry & Geophysics
RuXiang Gong, JingSong Li, ZiJun Huang, Fei Wang, Hao Yang, Xiang Rao, GuangLong Sheng, Hui Zhao, YunFeng Xu, Deng Liu
Summary: A data-space inversion method is proposed and applied for history matching and production prediction in steam flooding reservoir, proving its effectiveness and reliability.
Article
Geochemistry & Geophysics
Yingfei Sui, Chuanzhi Cui, Zhen Wang, Yong Yang, Peifeng Jia
Summary: The paper investigates the issue of interlayer interference during water flooding development, particularly in reservoirs adopting commingling production. It proposes an effective measure to mitigate interlayer interference and accurately allocate production using a simplified model and history matching method. The results demonstrate that this method is simple, accurate, and practical.
Article
Energy & Fuels
Yingzhong Yuan, Wende Yan, Zhilin Qi, Taotao Luo, Wei Fan
Summary: By comprehensively considering the migration law of air and foam in porous media, as well as various physical and chemical phenomena, this study establishes mathematical models for air-foam flooding. Through air-foam flooding experiments, the relevant parameters for numerical simulation of air-foam flooding are obtained. The reliability of the empirical model for numerical simulation of air-foam flooding is verified through matching with parallel core displacement experiment and air foam test flooding in Wuliwan Oilfield with a total fitting degree of over 90%.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2023)
Article
Environmental Sciences
Lifu Pang, Weitao Liu, Qiushuang Zheng, Yanhui Du, Xiangxi Meng, Xin Li
Summary: By combining numerical simulation and on-site measurements, this study found that the amount of surface subsidence and horizontal displacement under unfilled conditions is greater than that under filled conditions, with different plastic failure ranges. Numerical simulation can accurately predict the amount of ground subsidence and horizontal displacement, as well as the force on the goaf.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
Kaixuan Qiu
Summary: Ninety percent of China's newly proven natural gas reservoirs are unconventional resources that can be developed using multi-stage fracturing horizontal well technology. This paper presents an improved practical analytical solution for unconventional gas reservoirs. By solving the material balance equation and using integration, a real-time domain solution of rate vs. pseudo-time can be directly obtained. Five numerical cases are used to validate the accuracy of the proposed analytical solution and the derived ratio of regular/irregular region pore volume is significant for evaluating the effect of hydraulic fracturing. A field example of a multi-fractured horizontal well in a tight gas reservoir is also provided for demonstration.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Environmental Sciences
Juping Huang, Weiyang Zhao, Zhe Li, Yangming Ou, Lu Lin
Summary: This paper proposes a new methodology for estimating CO2 emissions in reservoirs by combining the floating chamber method and the thin boundary layer method and using numerical simulation to improve the estimation accuracy. In a demonstration study conducted in nine locations in the Xiangjiaba Reservoir, the total CO2 emission in the reservoir was estimated to be approximately 1.37 kg/s. This study is expected to provide a new approach and technical support for accurately estimating CO2 emissions in reservoirs.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
