Archives

  • November
    Vol. 14 No. 2 (2024)

    Cover image by Yunyi Qian on pages 106-118. The image illustrates seismic events on slip faults induced  by stress unloading during geo-energy extraction. As extraction of offshore oil and gas platforms reduces reservoir pressure, the surrounding faults may be activated. In these fluid-rich environments, the complex behavior of nearby fault slips is further influenced by  extraction activities, highlighting the intricate relationship between geo-energy development and subsurface fault dynamics.

  • October
    Vol. 14 No. 1 (2024)

    Cover image by Heping Xie on pages 12-24. The image illustrates the operation of the deep in-situ condition-preserved coring and testing technique. The enlarged view emphasizes that a solid film is forming during the coring process to preserve the core sample under in-situ conditions. This technique aims to obtain core samples with preserved in-situ conditions and test them in the in-situ environment to obtain their true physical and mechanical properties.

  • September
    Vol. 13 No. 3 (2024)

    Cover image by Yuliang Su on pages 203-217. The image illustrates the microscopic process of CO2 entering the shale heterogeneous porous media in the high temperature and high pressure chamber. When CO2 is injected along the fracture, the formation pressure gradually increases to the condition of oil and gas miscibility, and CO2 molecules will diffuse into the matrix, highlighting the migration of CO2 in the pore structure and the dynamic mechanism of the oil and gas interface during huff-n-huff.

  • August
    Vol. 13 No. 2 (2024)

    Cover image by Lichang Wang on pages 119-131. The image illustrates the hydraulic fracturing process in conglomerate reservoir. Fracturing fluid and proppant enter the formation through the perforations in the casing, the formation is fractured under the action of high-pressure fluid, creating fractures with high conductivity. The formula in the top left represents the core of the Transformer architecture: the attention mechanism.

  • July
    Vol. 13 No. 1 (2024)

    Cover image by Shuyu Sun on pages 32-41. The image illustrates the pore-network extraction idea in porous media. The ball and stick model represents the pore center and medial axis, and the ball at the saddle position means the throat center. The algorithm aims to solve the pore-network problem from pore scale to reservoir scale.

       

  • June
    Vol. 12 No. 3 (2024)

    Cover image by Mengdi Sun on pages 161-167. The image illustrates the capture of CO2 to enhance CH4 recovery and to achieve CO2 sequestration in shale reservoirs. It visually represents the characterization of nanoscale pore structure and components in shale. They control the fluid occurrence/transportation behavior and integrity and safety of CO2 storage in shale reservoirs.

       

  • May
    Vol. 12 No. 2 (2024)

    Cover image by Bing Wei on pages 141-155. The image illustrates the CO2 enhanced oil recovery process in unconventional reservoirs. It visually represents the CO2 miscible flooding process and the microscopic mobilization of crude oil in the miscible zone. The insights gained from this study have determined the critical pore scale of nanoconfining effect, providing strong evidence for extending the validity of classical theory to the nanoscale.

       

  • April
    Vol. 12 No. 1 (2024)

    Cover image by Xianmin Zhou on page 52-65. The image illustrates CO2-EOR and its sequestration alongside an injection and production system for depleted oil reservoirs. It visually represents CO2 distribution within pores and various trapping mechanisms, such as pore space trapping, residual phase trapping, and mineral trapping. The insights gleaned from this study offer valuable perspectives on strategically coordinating and integrating CO2-EOR with sequestration efforts.

       

  • March
    Vol. 11 No. 3 (2024)

    The cover image by Qinhong Hu, found on pages 230-240, depicts the occurrence status of oil in shale pores using the small-angle neutron scattering method. It addresses two challenges: the correlation between pore size in real space and scattering intensity in reciprocal space, and the characterization of oil molecular mass distribution in pore spaces.

       

  • February
    Vol. 11 No. 2 (2024)

    The cover image by Yongqiang Chen on page 152-160. The image visually represents the in-situ CO2 mineralization within basalt reservoirs. This study proposed a geochemical paradigm to select optimal petrophysical conditions to implement in-situ CO2 mineralization.

       

  • January
    Vol. 11 No. 1 (2024)

  • Decemeber
    Vol. 10 No. 3 (2023)

    Cover image by Weifeng Lv on pages 146-158. The image illustrates the transition from "interfacial elastic plugging" to "interfacial viscous flow" of oil droplets in porous media has been achieved through the structural design and optimization of betaine surfactants, enabling the surfactant monosystem to emulsify and displace oil in situ, while enhancing both oil displacement efficiency and swept volume.

  • November
    Vol. 10 No. 2 (2023)

    Cover image by Hongjian Zhu on pages 84-90. The image reveals the intrinsic relationship and mechanism between the structural evolution of shale pore-fracture, organic matter, inorganic mineral particles, and tectonic stress from macroscopic to micro- and nano-scales. It also clarifies the driving mechanism of physical changes in shale reservoirs.

  • October
    Vol. 10 No. 1 (2023)

    Cover image by Yizhao Wan on Pages 7-13. The image illustrates the thermal-hydraulic-mechanical-chemical coupling processes frequently encountered during the exploitation and utilization of natural gas hydrates, deep and shallow geothermal energy. Current techniques to simulate the coupling processes are not sufficient for detailed processes and efficient calculations. These challenges may be met by using artificial intelligence, supercomputing methods, and decoupling strategies in the future

  • September
    Vol. 9 No. 3 (2023)

    Cover image by Tuo Chen on pages 156-171. The image illustrates the seismic damage and dynamic support of roadway surrounding rock based on reconstructive transverse and longitudinal waves.Three key challenges are involved: seismic wave decomposion and reconstruction method, damage characteristics of roadway surrounding rock, and "zoned and asymmetric" dynamic support method for the roadway.

       

  • August
    Vol. 9 No. 2 (2023)

    Cover image by Han Wang on pages 106-116. The image illustrates the oil-water two-phase flow behaviors in nanoporous media after hydraulic fracturing of shale oil reservoir. The different slip velocities of oil and water flow on different mineral surfaces are taken into account during the flow process.

       

  • July
    Vol. 9 No. 1 (2023)

    Cover image by Jifang Wan on pages 54-67. The image illustrates the primary construction process of salt caverns for compressed air energy storage. The underground construction of salt caverns mainly involves three key technologies: large-diameter drilling & completion and wellbore integrity, solution mining morphology control and detection, as well as evaluation of factors affecting cavern tightness.

       

  • June
    Vol. 8 No. 3 (2023)

    Cover image by Yiqun Zhang on pages 181-192. The image illustrates the cavitation collapse process near and on attached walls, analyzes the shock wave and microjet generation mechanisms, and provides initial insights into the cavitation damage under different standoff distances. These findings lay a theoretical foundation of high pressure water jet drilling technology.

       

  • May
    Vol. 8 No. 2 (2023)

    Cover image by Jinsheng Sun on pages 112-125. The image illustrates the plugging mechanism of self-healing gel in formation fractures. After the self-healing gel particles migrate to the leakage channel, the self-healing gel particles form a new three-dimensional polymer network structure through the dynamic chain, and self-heal into a whole gel to effectively plug the leakage channel.

  • April
    Vol. 8 No. 1 (2023)

    Cover image by Xin Nie on pages 5-18. The image illustrates the application of deep learning methods in digital rock technology. With the known digital rock image data as the input, deep learning methods such as convolutional neural networks can help in generating various output data, including higher resolution images, multi-component images, and rock permeability.

  • March
    Vol. 7 No. 3 (2023)

    Cover image by Ruina Xu on pages 189-198. The image illustrates the salt precipitation behavior during CO2 geological storage in saline aquifers. The heterogeneity of reservoirs can avoid the local aggregation of salt near injection wells, thereby mitigating the effect of salt precipitation on injectivity. Meanwhile, salt is also preferentially precipitated in the fracture.

  • February
    Vol. 7 No. 2 (2023)

    Cover image by Kaiqiang Zhang on pages 132-135. Tight and shale reservoirs contain numerous nanopores of molecular size. The reduced pore scale results in the restricted free thermal motion and the enhanced intermolecular interactions, which induces the fluid phase to behave much differently. Understanding the deviated phase behavior at nanoscale contributes huge implications for unconventional hydrocarbons exploration and development.

  • January
    Vol. 7 No. 1 (2023)

    Cover image by Yuan Wang on pages 28-38. The image illustrates the reliability study of elastic graphite packers during the heat injection process of in-situ conversion mining heaters. When the downhole temperature is stable, the downhole pressure has the most obvious effect on the seal reliability of the packer, while the change of the rubber height has the least effect on the seal reliability. 

  • Decemeber
    Vol. 6 No. 6 (2022)

  • October
    Vol. 6 No. 5 (2022)

    Special Issue: Deep oil and gas resources in South China Sea, Edited by Xiongqi Pang, Hongbo Li, Hong Pang

1-25 of 48