Article
Geosciences, Multidisciplinary
Christoforos Benetatos, Giorgio Giglio
Summary: Reliable 3D modelling of underground hydrocarbon reservoirs is a challenging task due to complex geological formations and uncertainties in data. For fractured reservoirs, accurate analysis and quantification of uncertainties are necessary to provide a reliable confidence range of volumetric estimations. An integrated workflow is crucial for constructing and validating 3D numerical models of hydrocarbon-bearing reservoirs and can be beneficial for the training of young geoscientists and engineers.
GEOSCIENCE FRONTIERS
(2021)
Article
Energy & Fuels
Yi-Fei Sun, Bo-Jian Cao, Jin-Rong Zhong, Jing-Yu Kan, Rui Li, Jing-Shuo Niu, Hong-Nan Chen, Guang-Jin Chen, Guo-Zhong Wu, Chang-Yu Sun, Dao-Yi Chen
Summary: This study effectively improves the efficiency of natural gas extraction, increases the CH4 recovery rate, and achieves CO2 hydrate storage through reservoir reformation technology. The results show that this method is very promising.
Article
Geosciences, Multidisciplinary
Paolo Mancinelli
Summary: This study tests the gravity effects of different reservoir scenarios after primary exploitation and evaluates the impact of water flooding, carbon dioxide and hydrogen storage, and withdrawal on gravity signatures of underground reservoirs. The results show that carbon dioxide and water can provide detectable gravity signatures even at maximum depth, while hydrogen storage or withdrawal often result in undetectable signatures when tested at different depths.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Energy & Fuels
Yi-Fei Sun, Bo-Jian Cao, Hong -Nan Chen, Yin -Long Liu, Jin-Rong Zhong, Liang-Liang Ren, Guang-Jin Chen, Dao-Yi Chen
Summary: In addition to temperature and pressure, pore fluid composition and migration behavior play crucial roles in the decomposition of hydrates during exploitation. This study conducted depressurization experiments using hydrate reservoir samples with different water saturations to investigate these factors. The results showed that a larger gas-phase space facilitated hydrate decomposition and gas outflow, ultimately improving gas production efficiency. Additionally, the spatiotemporal evolution of pore fluids could affect hydrate decomposition or formation. It is recommended to use short-term N2 sweep during the early stages of depressurization to enhance gas-phase space and optimize production efficiency.
Article
Physics, Multidisciplinary
Yandong Jiang, Liang Chen, Tuo Zhou, Liangrong You, Guangzhen Chu, Dazhong Ren, Zhaohua Zhou
Summary: This paper proposes a reserve simulation method and analyzes the connectivity and gas-water interface of the DT 2 well area in the Wubaiti Carboniferous gas reservoir. The results show the existence of two independent water bodies and a blocking zone, providing valuable reference for the connectivity research of similar gas reservoirs.
FRONTIERS IN PHYSICS
(2022)
Article
Energy & Fuels
Li Jia, Shoujian Peng, Jiang Xu, Fazhi Yan
Summary: This study investigated the mechanism of fluid migration and interlayer interference in multilayer superimposed gas-bearing systems through coproduction experiments. It found a coupling effect between reservoir pressure gradient, matrix shrinkage, and effective stress, affecting reservoir pressure evolution. Interlayer interference increases gradually as the difference in pressure gradients between reservoirs increases.
Article
Mechanics
Shun Liu, Yalong Zhang, Hengyi Du, Jianbin Liu, Zhixiang Zhou, Zongzhen Wang, Kai Huang, Bosheng Pan
Summary: In this study, a two-dimensional visual model of a fractured-vuggy reservoir was designed based on geological data and injection-production characteristics. Flooding experiments were conducted to investigate the oil-water flow characteristics and residual oil distribution. The results showed that a low injection/high production strategy is the most optimal for achieving maximum oil recovery. The findings of this study provide insights for optimal production in fractured-vuggy carbonate reservoirs and enhance the understanding of oil-water flows within the reservoir.
Article
Energy & Fuels
Rasoul Ranjbar-Karami, Parisa Tavoosi Iraj, Hamzeh Mehrabi
Summary: Knowledge of initial fluids saturation is crucial for hydrocarbon reservoir analysis and modeling. The distribution of initial water saturation in 3D models affects reserve estimation and dynamic modeling. Studying the pore facies framework in a heterogeneous carbonate reservoir can lead to a better understanding of the reservoir characteristics. This study shows that integrating petrographic analyses with routine and special core data can help in modeling initial water saturation.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2021)
Article
Energy & Fuels
Fei Mo, Zhilin Qi, Xiaoliang Huang, Wende Yan, Shuai Wang, Yingzhong Yuan, Zhiqiang Li
Summary: This study proposed a model to calculate the diffusivity of gases in water-bearing shales. The results showed that the presence of water significantly reduced the gas diffusion in shales. In addition, factors such as temperature, pore radius, porosity, and pore wall roughness were found to affect the diffusion coefficient.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Yunbing Hu, Yinghai Guo, Hairuo Qing, Junjian Zhang
Summary: The Upper Carboniferous sandstone reservoir in the Ordos Basin is crucial for natural gas exploration. This study analyzed 157 Jinci sandstone samples to understand the reservoir's material composition and pore structure. The results showed that the reservoir is mainly composed of quartz arenite and sublithic arenite, with quartz being the dominant detrital particle. The cement consists of siliceous material, clay minerals, and carbonate. Different pore-throat structures and radius distributions were identified. Factors such as deposit composition and diagenetic modification were found to influence the reservoir's pore structure. The study also predicted the reservoir quality based on lithological characteristics and diagenetic-controlled pore-throat evolution patterns.
Article
Chemistry, Multidisciplinary
Yande Zhao, Weili Wang, Ruiliang Guo, Weibin Wang, Yunlong Zhu, Ruijing Wang, Xinhai Li, Yunxiang Zhan
Summary: This study focused on the heterogeneity of the Upper Paleozoic tight gas sandstone reservoir in the southeast of the Ordos Basin through various analysis methods. The results identified the dominant pathways for natural gas migration and the impact of rhythmic changes on gas and water distribution within the sand body, as well as the role of interlayers in gas distribution. The presence of barrier layers was also found to affect the storage capacity of the reservoir for natural gas accumulation.
Article
Energy & Fuels
Guizhen Liu, Guangcheng Hu, Xiaozhang Shi, Yaping Ma, XiuZhen Yin, Airong Li
Summary: The Chang 6 member sandstone in the Ordos basin of China is a major oil reservoir, with carbonate cement being the most important diagenetic parameter controlling reservoir quality. Three generations of carbonate cements have been identified, with different characteristics and distribution patterns in the sandstones.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Geosciences, Multidisciplinary
Minglei Yang, Xinya Yu, Dancheng Zhu, Ke Long, Chaojin Lu, Huayao Zou
Summary: This study investigates the distribution and reservoir characteristics of microbial carbonates in the upper submember of the Middle Triassic Leikoupo Formation in the western Sichuan Basin. It identifies high-quality reservoirs in the central area (regressive microbialites) and northern area (intraclast dolograinstone). The study proposes a depositional framework for microbialites and evaluates its control on reservoir quality, which is significant for further research on microbial carbonate reservoirs.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Geochemistry & Geophysics
Peng Yu
Summary: This study predicts and characterizes the permeability of Daniudi tight gasfield in China from a new perspective using geoscience data mining algorithms and modeling techniques. The results show that the facies-controlled modeling system based on the hydrodynamic characteristics of tight gas reservoirs effectively improves reservoir prediction accuracy.
Article
Energy & Fuels
Jieming Wang, Jinkai Wang
Summary: This study comprehensively evaluated the feasibility of the DU6 gas reservoir for gas storage, including determining sedimentary model, pore characteristics, the impact of pressure changes on permeability, and quantifying effective pore volume. Results show a gas storage capacity of 99.27 x 10(8) m(3), providing reliable technical support for underground gas storage reconstruction.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
