An intelligent integrated production optimization technique for waterflooding reservoirs
June 2025
The production optimization in the closed-loop reservoir management is generally empirical, and challenged by the issues such as low precision, low efficiency, and difficulty in solving constrained...
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Geological characteristics and hydrocarbon accumulation model of the whole petroleum system in Paleogene of Jiyang Depression, Bohai Bay Basin, China
June 2025
Based on a large amount of basic research and experimental analysis data from Shengli Oilfield, Bohai Bay Basin, guided by the theory of whole petroleum system, the distribution of sedimentary systems,...
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Effects of hydration on the mechanical properties of deep shale under true triaxial stress: A case study of Fuling shale gas in Sichuan Basin, SW China
June 2025
This study takes shale samples from the Jiaoshiba block in the Fuling shale gas field of the Sichuan Basin, and uses the true triaxial testing system to conduct a series of mechanical experiments under...
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Impact of clay coating on sandstone reservoir quality: A multiphase-field investigation by numerical simulation
June 2025
The presence of clay coatings on the surfaces of quartz grains can play a pivotal role in determining the porosity and permeability of sandstone reservoirs, thus directly impacting their reservoir quality....
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Intelligent optimization method of fracturing parameters for shale oil reservoirs in Jimsar Sag, Junggar Basin, NW China
June 2025
For shale oil reservoirs in the Jimsar Sag of Junggar Basin, the fracturing treatments are challenged by poor prediction accuracy and difficulty in parameter optimization. This paper presents a fracturing...
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Artificial intelligence large model for logging curve reconstruction
June 2025
To improve the accuracy and generalization of well logging curve reconstruction, this paper proposes an artificial intelligence large language model – “Gaia” and conducts model evaluation experiments....
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Application of borehole images in the characterization of volcanic paleoenvironments with implications for the exploration of hydrocarbons in Brazilian basins
June 2025
Conventional borehole image log interpretation of linear fractures on volcanic rocks, represented as sinusoids on unwrapped cylinder projections, is relatively straight-forward, however, interpreting...
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Circle structure and orderly hydrocarbon accumulation of whole petroleum system in a continental fault basin: A case study of Kong-2 Member in Cangdong Sag, Bohai Bay Basin, China
June 2025
Guided by the fundamental principles of the whole petroleum system, the control of tectonism, sedimentation, and diagenesis on hydrocarbon accumulation in a fault basin is studied using the data of...
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Exploration breakthrough and hydrocarbon accumulation conditions of Mesozoic volcanic rocks in Bodong Low Uplift, Bohai Bay Basin, China
June 2025
The Mesozoic volcanic rocks of the Bodong Low Uplift in the Bohai Bay Basin have been studied and explored for years. In 2024, the LK7-A well drilled in this region tested high-yield oil and gas flows...
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Structural characteristics of faults in Wangfu fault depression and their control on coal-rock gas enrichment, Songliao Basin, NE China
June 2025
Taking the Wangfu fault depression in the Songliao Basin as an example, on the basis of seismic interpretation and drilling data analysis, the distribution of the basement faults was clarified, the...
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Theory and practice of energy-focused fracturing development technology
June 2025
Currently, unconventional reservoirs are characterized by low single well-controlled reserves, high initial production but fast production decline. This paper sorts out the problems of energy dispersion...
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Multi-detachment-controlled thrust structures and deep hydrocarbon exploration targets in southern margin of Junggar Basin, NW China
June 2025
For deep prospects in the foreland thrust belt, southern Junggar Basin, NW China, there are uncertainties in factors controlling the structural deformation, distribution of paleo-structures and detachment...
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The coal-formed gas theory promoting China from a gas-poor country to a major gas-producing country in the world
June 2025
In the late 1970s, the theory of coal-formed gas began to take root, sprout, develop, and improve in China. After decades of development, a complete theoretical system was finally formed. The theory...
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Optimal bit selection for large-diameter wellbore drilling in an ultra-deep well
June 2025
To optimize the bit selection for large-diameter wellbore in the upper section of an ultra-deep well S-1, a full-well dynamic model integrating drill string vibration and bit rock-breaking was established...
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Technology and understanding of post-fracturing coring in three-dimensional development zone of Fuling shale gas, Sichuan Basin, SW China
June 2025
The core sampling experiments conducted after hydraulic fracturing were carried out in the three-dimensional development zone of Fuling shale gas. Six coring wells of different well types were systematically...
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Optimization of fracturing parameters in multi-layer and multi-period cube development infill well pad: A case study on a three-layer cube development well pad of Sichuan Basin, SW China
June 2025
The method for optimizing the hydraulic fracturing parameters of the cube development infill well pad was proposed, aiming at the well pattern characteristic of “multi-layer and multi-period” of the...
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Multi-scale intelligent fusion and dynamic validation for high-resolution seismic data processing in drilling
June 2025
During drilling operations, the low resolution of seismic data often limit the accurate characterization of small-scale geological bodies near the borehole and ahead of the drill bit. This study investigates...
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Identification indexes and diagrams for natural gas origin: Connotation, significance and application
June 2025
Accurate identification of natural gas origin is fundamental to the theoretical research on natural gas geosciences and the exploration deployment and resource potential assessment of oil and gas. Since...
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Assessment and exploration prospects of the oldest marine shale oil in North China
June 2025
Based on large-field rock thin section scanning, high-resolution field emission-scanning electron microscopy (FE-SEM), fluorescence spectroscopy, and rock pyrolysis experiments of the Mesoproterozoic...
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Development technologies and models of different types of gas reservoirs in Ordos Basin, NW China
June 2025
This study systematically reviews the development history and key technological breakthroughs of large gas fields in the Ordos Basin, and summarizes the development models of three gas reservoir types,...
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Lamina combination characteristics and differential shale oil enrichment mechanisms of continental organic-rich shale: A case study of Triassic Yanchang Formation Chang 73 sub-member, Ordos Basin, NW China
April 2025
The lamina (combination) types, reservoir characteristics and shale oil occurrence states of organic-rich shale in the Triassic Yanchang Formation Chang 73 sub-member in the Ordos Basin were systematically...
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Paleoclimate, paleoenvironment and source rock development model of Eocene in Shunde Sag, Pearl River Mouth Basin, China
April 2025
Based on the comprehensive analysis of data from petrology and mineralogy, well logging, seismic surveys, paleontology, and geochemistry, a detailed research was conducted on paleoenvironmental and...
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Response of organic matter pore development to functional groups in overmature marine shale: Insights from AFM-IR spectroscopy
April 2025
Taking the Lower Silurian Longmaxi Formation shale in the Sichuan Basin as an example, this study employs atomic force microscopy-based infrared (AFM-IR) spectroscopy to analyze the submicron-scale...
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Controlling factors and exploration potential of shale gas enrichment and high yield in Permian Dalong Formation, northern Sichuan Basin, SW China
April 2025
Based on the basic data of drilling, logging, testing and geological experiments, the geological characteristics of the Permian Dalong Formation marine shales in the northern Sichuan Basin and the factors...
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Formation and preservation of pores in deep limestone reservoirs: A case study of Upper Permian Changxing Formation, central Sichuan Basin, SW China
April 2025
In recent years, drilling data from wells Pengshen 10, Heshen 9, Tongshen 17 and Zhengyang 1 in the Sichuan Basin have confirmed the presence of a set of porous reef-beach limestone reservoirs in the...
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