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Imbibition Characteristic of Fractured Tight Sandstone Reservoir
Processes, 2022 “Fracture network stimulation + imbibition replacement” is a new attempt to effectively develop tight sandstone reservoirs, and the fractures provide conditions for fluid imbibition replacement. On the basis of nuclear magnetic resonance and pseudo-color processing technology, combined with the imbibition experiments, this paper studies the imbibition ...
Xiong Liu, Xin Fan, Jian Yin, Yang Zhang
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Complex conductivity of tight sandstones [PDF]
GEOPHYSICS, 2018 Induced polarization well logging can be used to characterize sedimentary formations and their petrophysical properties of interest. That said, nothing is really known regarding the complex conductivity of low-porosity sedimentary rocks. To fill this gap of knowledge, we investigate the complex conductivity of 19 tight sandstones, one bioclastic ...
André Revil +4 more
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On a workflow for efficient computation of the permeability of tight sandstones
CoRR, 2022 The paper presents a workflow for fast pore-scale simulation of single-phase flow in tight reservoirs typically characterized by low, multiscale porosity. Multiscale porosity implies that the computational domain contains porous voxels (unresolved porosity) in addition to pure fluid voxels.
Vladislav Pimanov +9 more
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Influence of Microcracks on Stress Sensitivity in Tight Sandstone [PDF]
Lithosphere, 2021 Abstract Stress sensitivity occurs throughout the reservoir development process, especially in the study of low permeability tight reservoir, considering the influence of stress sensitivity is particularly important. When studying stress sensitivity, the current main experimental methods are variable confining pressure and variable fluid
Zhenkai Wu +8 more
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Two-scale analysis of a tight gas sandstone
Physical Review E, 2016 Tight gas sandstones are low porosity media, with a very small permeability (i.e., below 1 mD). Their porosity is below 10%, and it is mainly composed of fine noncemented microcracks, which are present between neighboring quartz grains. While empirical models of permeability are available, their predictions, which do not compare well with macroscopic ...
Song, Yang +6 more
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Characteristics of Tight Sandstone Cement in Panke Area
IOP Conference Series: Earth and Environmental Science, 2021 Abstract In order to improve the success rate of oil and gas exploration and further study the impact of tight sandstone cements on reservoirs, this paper uses a large number of rock thin sections, scanning electron microscopy, and physical property analysis to analyze the cements of the Chang 6 reservoir in the Panke area, southern ...
Yang Shasha +4 more
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Forced imbibition in tight sandstone cores
Shiyou shiyan dizhi, 2021 Spontaneous imbibition (SI) generally occurs under forced pressure (pressure difference between hydraulic fluid pressure and original pore pressure) during a shut-in period. However, the experimental study of SI is commonly performed at atmospheric pressure and the effect of forced pressure is often neglected.
Yun JIANG +6 more
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Stress effects on the relative permeabilities of tight sandstones
Comptes Rendus. Géoscience, 2018 This note deals with the study of stress-sensitive relative permeability experimentally observed in low permeable sandstones. These sandstones are made up of quartz grains surrounded by permeable interfaces between grains and pores. A micromechanical model of relative permeability behaviour under loading highlights the role of the closure of interfaces.
Jeannin, Laurent +3 more
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Physical simulation on gas percolation in tight sandstones
Petroleum Exploration and Development, 2013 Capillary pressure was tested on 40 matrix cores (in situ permeability: 0.002×10−3–100 ×10−3 μm2) in the Sulige gas field and the pore structure features of different type sands were described finely. Based on the research on the pore structure features, gas percolation experiments were designed under the conditions of homogeneous cores with different ...
Yong HU +8 more
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Study on seepage characteristics of tight sandstone reservoir
IOP Conference Series: Materials Science and Engineering, 2020 Abstract Seepage characteristics of reservoir rocks are important factors affecting the effect of tight oil and gas production. Therefore the pore structure of tight sandstone from Dong 6 well in 4 block of the central Dzungaria Basin were studied by mercury injection experiment, and the seepage characteristics of tight sandstone were ...
Yongfu Zhao +5 more
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