Transmission mechanism from orbital forced climate change to organic matter and shale oil enrichment: A case study of Gulong shale oil in the Cretaceous Qingshankou Formation, Songliao Basin, NE China
October 2025
Taking the GY8HC well in the Gulong Sag of the Songliao Basin, NE China, as an example, this study utilized high-precision zircon U-Pb ages from volcanic ashes and AstroBayes method to estimate sedimentation...
Control of negative inversion structures on high-quality Carboniferous buried hill reservoirs in the Weixinan Sag, Beibu Gulf Basin, China
October 2025
Based on drilling, mud logging, core, seismic and imaging logging data, this paper studies the identification and evolution process of negative inversion structures in the Carboniferous buried hills...
Structural physical simulation experiment on vertical growth process of strike-slip faults in ultra-deep strata of Tarim Basin, NW China
October 2025
In the ultra-deep strata of the Tarim Basin, the vertical growth process of strike-slip faults remains unclear, and the vertical distribution of fractured-cavity carbonate reservoirs is complex. This...
Experiment on proppant transport into fractures of unconventional reservoirs using stereoscopic particle image velocimetry
October 2025
Stereoscopic particle image velocimetry technology was employed to investigate the planar three-dimensional velocity field and the process of proppant entry into branch fractures in a fracture configuration...
Propagation characteristics of multiple clusters of fractures in fully coupled wellbore-perforation-fracture fracturing
October 2025
Based on the Low Frequency Distributed Acoustic Sensing (LF-DAS) fiber optic monitoring and downhole hawk-eye imaging, the fluid and sand distribution and perforation erosion of all clusters during...
Laboratory investigation of high-temperature preformed particle gels for fluid control in granite cores for geothermal applications
October 2025
To understand the applicability of high-temperature preformed particle gel (HT-PPG) for control of short-circuiting in enhanced geothermal systems (EGSs), core flooding experiments were conducted on...
Orderly distribution and differential enrichment of conventional and unconventional hydrocarbons in the Cretaceous Qingshankou Formation, northern Songliao Basin, NE China
October 2025
Based on the petroleum exploration in the Cretaceous Qingshankou Formation, northern Songliao Basin, NE China, integrated with seismic, drilling and logging data, this study investigates the characteristics...
Whole petroleum system and main controlling factors of hydrocarbon accumulation in the Mesozoic of Ordos Basin, NW China
October 2025
Based on the investigation of sedimentary filling characteristics and pool-forming factors of the Mesozoic in the Ordos Basin, the whole petroleum system in the Mesozoic is divided, the migration &...
Progradational sequence stratigraphic architecture of the Triassic Yanchang Formation and a case study of Qingcheng Oilfield, Ordos Basin, NW China
October 2025
To address the discrepancies between well and seismic data in stratigraphic correlation of the Triassic Yanchang Formation in the Ordos Basin, NW China, traditional stratigraphic classification schemes,...
Technological progress and scientific significance of the drilling of the ten-thousand-meter ultra-deep well TK1, Tarim Basin, NW China
October 2025
In 2023, the China National Petroleum Corporation (CNPC) has successfully drilled a 10 000-m ultra-deep well – TK-1 in the Tarim Basin, NW China. This pioneering project has achieved dual breakthroughs...
Features and controlling factors of source-to-sink system during the fault-depression transition in a marine rift basin: A case study of Paleogene Oligocene Lingshui Formation in Qiongdongnan Basin, China
October 2025
Guided by the analysis of source-to-sink system, this study investigates the Paleogene Oligocene Lingshui Formation in the Qiongdongnan Basin by comparing the geological characterizes in land and sea...
Microscopic mechanisms of intrasource micro-migration and enrichment of lacustrine shale oil: A case study of Chang73 submember of Triassic Yanchang Formation, Ordos Basin, NW China
October 2025
To clarify the mechanism of differential enrichment of intrasource shale oil, taking the third of seventh member of the Triassic Yanchang Formation (Chang73 submember for short) in the Ordos Basin,...
Waterflooding strategies for Cretaceous carbonate reservoirs with high permeability zones in the Middle East
October 2025
Based on the waterflooding development in carbonate reservoirs in the Middle East, this study analyzes the geological characteristics and waterflooding behaviors/patterns of different types of high...
Occurrence types and enrichment model of organic matter in the sepiolite-containing successions: A case study of the first member of Mid-Permian Maokou Formation, Eastern Sichuan Basin, SW China
October 2025
The occurrence types and controlling factors of organic matter in the sepiolite-containing successions of the first member of Mid-Permian Maokou Formation (Mao-1 Member for short) in the Eastern Sichuan...
A saturation model of lacustrine shale oil considering the influence of organic matter: A case study of the first member of the Cretaceous Qingshankou Formation of Changling Sag in southern Songliao Basin, NE China
October 2025
Taking the shale oil of the first member of the Cretaceous Qingshankou Formation of Changling Sag in southern Songliao Basin as an example, this paper establishes a saturation model of lacustrine shale...
A new type of unconventional natural gas resources: Overpressure-dissolved gas
October 2025
In overpressure reservoirs, natural gas often coexists in a three-phase mixed form of continuous free state, dispersed free state and water-saturated dissolved state. However, the latter two have not...
Research progress and key research directions of shale oil in lacustrine rift basins
October 2025
Lacustrine rift basins in China are characterized by pronounced structural segmentation, strong sedimentary heterogeneity, extensive fault-fracture development, and significant variability in thermal...
Pore structure properties characterization of shale using generative adversarial network: Image augmentation, super-resolution reconstruction, and multi-mineral auto-segmentation
October 2025
Existing imaging techniques cannot simultaneously achieve high resolution and a wide field of view, and manual multi-mineral segmentation in shale lacks precision. To address these limitations, we propose...
Mechanisms of hydrated ion bridges in the development of low and ultra-low permeability reservoirs
October 2025
This study focuses on the hydrated ion bridge (HIB) effect at the oil-rock interface in low- to ultra-low-permeability oil reservoirs. It systematically summarizes the research methodologies, formation...
New high-efficiency system for improving oil recovery based on the superwetting phenomenon
October 2025
Given that a large amount of crude oil remains on the surface of rocks and is difficult to produce after conventional waterflooding, a new superwetting oil displacement system incorporating the synergy...
Carbon isotope fractionation and production patterns of adsorbed and free gas during deep coal-rock gas production
October 2025
Taking deep coal-rock gas in the Yulin and Daning-Jixian areas of the Ordos Basin, NW China, as the research object, full-diameter coal rock samples with different cleat/fracture development degrees...
Key parameters and evaluation methods for large-scale production of lacustrine shale oil
August 2025
Based on the analysis of typical lacustrine shale oil zones in China and their geological characteristics, this study elucidates the fundamental differences between the enrichment patterns of shale...
Fracture propagation and fatigue damage mechanisms in pulse hydraulic fracturing of deep coal
August 2025
By integrating laboratory physical modeling experiments with machine learning-based analysis of dominant factors, this study explored the feasibility of pulse hydraulic fracturing (PHF) in deep coal...
Natural gas types and coal-rock gas classification in the whole petroleum system of coal measures
August 2025
There are various types of natural gas resources in coal measures, making them major targets for natural gas exploration and development in China. In view of the particularity of the whole petroleum...
Tectonic deformation and its petroleum geological significance of continental margin necking zone in deepwater area of Pearl River Mouth Basin, South China Sea
August 2025
Based on a set of high-resolution 3D seismic data from the northern continental margin of the South China Sea, the lithospheric structure, thinning mechanisms and related syn-rift tectonic deformation...