Article
Energy & Fuels
Ze Chen, Gao Li, Xu Yang, Yi Zhang
Summary: This study investigates the impact of high temperatures on the microstructure of tight sandstone formations, finding that heating to certain thresholds can significantly improve gas permeability. Electric heating is identified as a potential method for enhancing the productivity and exploitation efficiency of tight gas formations.
Article
Energy & Fuels
Jie He, Xiangdong Guo, Hongjun Cui, Kaiyu Lei, Yanyun Lei, Lin Zhou, Qinghai Liu, Yushuang Zhu, Linyu Liu
Summary: The study shows that changes in gas viscosity and compressibility with pressure and temperature affect the results in the modified flowing material balance method. When allocating dynamic reserves, it has an important impact on the stable production period and initial decline rate.
Article
Geochemistry & Geophysics
Yongchao Xue, Qingshuang Jin, Hua Tian
Summary: This paper focuses on a typical tight sandstone gas reservoir in Changqing Oilfield, revealing a strong stress sensitivity and impact of start-up pressure gradient on gas well productivity.
Article
Geosciences, Multidisciplinary
Yuanyin Zhang, Junfeng Zhang, Yongjin Gao, Yalei Liu, Miaoqing Miao, Qingyao Li, Zhichao Sun
Summary: The first industrial gas flow has been achieved in the Shajingzi Belt in the northwest Tarim Basin in China. Through comprehensive analysis of drilling, oil testing, geophysics, geological, and geochemical data, a meaningful Silurian hydrocarbon accumulation model was established, and potential areas were discovered. This research has significant implications for exploration in similar basin-range junction areas.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Fan Yang
Summary: The study investigates the acidizing problems in the sandstone reservoir of Shanshan oilfield and proposes a combined system of multinanoscale stimulation fluid and mud acid. The research provides a scientific basis for acidizing and stimulation of ultra-low permeability sandstone reservoirs.
Article
Geosciences, Multidisciplinary
Ziyi Wang, Nengwu Zhou, Shuangfang Lu, Yancheng Liu, Liming Lin, Yang Liu, Bo Song
Summary: This study investigates the generation, accumulation, and distribution of tight sandstone gas in the Linxing-Shenfu gas fields in the northeastern margin of the Ordos Basin. It utilizes various approaches and data analysis to characterize different types of reservoirs and their formation mechanisms.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Han Jin, Cai Liu, Zhiqi Guo, Yiming Zhang, Cong Niu, Di Wang, Yun Ling
Summary: This study utilized the Chapman theory to simulate the dispersion and attenuation of P-wave velocity in tight gas sandstone. By conducting synthetic seismic AVO modeling, it was found that variations in the amplitudes and phases of the PP reflections can indicate gas saturation in tight sandstone reservoirs. The frequency-dependent AVO inversion method has good potential for evaluating gas saturation in tight gas sandstone reservoirs.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geochemistry & Geophysics
Yajun Tian, Alexey Stovas, Jinghuai Gao, Wenhao Xu, Jiaxin Yu
Summary: In this paper, a new workflow based on amplitude-versus-offset attributes is proposed to characterize the tight sandstone gas reservoirs in the Xihu Depression, East China Sea. The workflow utilizes the Backus average method and Gassmann's equation to construct the rock physics model. By analyzing the anisotropic model and using Ruger's anisotropic equation for amplitude-versus-offset forward modeling, the relationship between reservoir parameters and amplitude-versus-offset attributes is established.
GEOPHYSICAL PROSPECTING
(2023)
Article
Energy & Fuels
Jie He, Xiaobing Niu, Qingchun Meng, Fajun Guo, Hongmei Wang, Yicang Liu, Lianguo Wang, Yongmei Kang, Kelai Hu, Yushuang Zhu
Summary: This study constructed a productivity model for the horizontal stress field between well clusters and investigated the impact of simultaneous fracturing on induced stress fields. The results showed that row spacing was the most influential factor. Field application of the findings demonstrated significant increases in well production and decreases in decline rates, along with a substantial increase in well output during stable production periods.
PETROLEUM SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Chemical
Xiong Liu, Xin Fan, Jian Yin, Yang Zhang
Summary: The study shows that in fractured tight sandstone reservoirs, imbibition replacement mainly occurs in fractures, with macropores contributing the most to imbibition recovery, while mesopores, micropores, and pinholes contribute less. Capillary force and gravitational force are key parameters controlling fluid flow, and fluid replacement mostly happens in the early stages of imbibition.
Article
Energy & Fuels
Guangfeng Liu, Shuaiting Xie, Wei Tian, Juntao Wang, Siying Li, Yixuan Wang, Daoyong Yang
Summary: In this study, the effect of pore-throat structure on gas-water seepage behavior in a tight gas sandstone formation was experimentally examined. The study found that deteriorated pore-throat structure leads to weakened permeability of gas and water, along with more severe water locking. This research provides a better understanding of how pore-throat structure influences gas-water seepage behavior in tight gas reservoirs.
Article
Geochemistry & Geophysics
Mengyuan Li, Ying Hu, Hui Chen, Xuping Chen, Ping Lan
Summary: This letter proposes a novel method called basis matching chirplet transform (BMCT) for time-frequency (TF) analysis, which is applied in tight sandstone gas reservoirs. The BMCT constructs a new basis function that changes with time and frequency to replace the original phase function and alters the second-order group delay (GD) by parameterizing the TF basis. By optimizing the basis parameters according to the kurtosis theory, the BMCT can provide an energy-concentrated TF representation (TFR) for multicomponent signals.
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
(2022)
Article
Geochemistry & Geophysics
Bai Yang, Tan MaoJin, Xiao ChengWen, Han Chuang, Wu HongLiang, Luo WeiPing, Xu BinSen
Summary: Tight sandstone fluid identification is challenging, but intelligent algorithms can help establish a model. Using a classification committee machine with a gate network for modular learning improves overall performance. The method enhances prediction accuracy and generalization by combining multiple experts and establishing correspondence between submodels and experts.
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
(2021)
Article
Geosciences, Multidisciplinary
Zhaolong Liu, Yongling Zhang, Yongzhong Zhang, Libin Zhao, Peng Peng, Hualin Liu, Baohua Chang, Weigang Huang, Peng Zhou
Summary: The Bozi 3 gas reservoir in the Tarim Basin is an ultra-deep fractured tight sandstone gas reservoir with characteristics such as tight reservoir matrix, well-developed fractures, and large differences in well productivity. The reservoir was formed in a lake environment with strong hydrodynamic conditions, and later experienced deep burial and uplift, resulting in the formation of a low-porosity and ultra-low permeability reservoir with significant fracture development. The difference in reservoir characteristics is identified as the main reason for variations in production and formation pressure distribution.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Energy & Fuels
Jin Huang, Jiacheng Xing, Xingchuan Liao, Yixing Ren, Keer Ding, Jin Tan
Summary: This paper explores the damage mechanism and evolution process of tight reservoir rocks through experiments and numerical simulations. The experiments show that rock failure mainly includes tensile, shear, and tensile-shear failure, and the microscopic parameters have significant effects on the tensile and compressive strength of rocks. These research results provide a theoretical basis for the efficient exploitation of tight reservoirs.
FRONTIERS IN ENERGY RESEARCH
(2023)