Zhengdong Lei
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View article: Correlation-based EUR prediction of shale oil wells: A case of the Qingcheng Oil Field in the Ordos Basin
Correlation-based EUR prediction of shale oil wells: A case of the Qingcheng Oil Field in the Ordos Basin Open
View article: High-resolution sequence stratigraphic framework and target sand bodies correlation of tight oil reservoirs in the Upper Triassic Yanchang Formation, Ordos Basin
High-resolution sequence stratigraphic framework and target sand bodies correlation of tight oil reservoirs in the Upper Triassic Yanchang Formation, Ordos Basin Open
View article: Evaluation of the adaptability of CO2 pre-fracturing to Gulong shale oil reservoirs, Songliao Basin, NE China
Evaluation of the adaptability of CO2 pre-fracturing to Gulong shale oil reservoirs, Songliao Basin, NE China Open
Based on development practices of Gulong shale oil and a series of experiments on interactions between CO2 and the rocks and fluids of shale oil reservoirs, the application and adaptability of CO2 pre-fracturing to the Gulong shale oil res…
View article: Quantifying the Matching Relationship of Sizes Between Partially Hydrolyzed Polyacrylamides and Regular Nuclepores
Quantifying the Matching Relationship of Sizes Between Partially Hydrolyzed Polyacrylamides and Regular Nuclepores Open
Water‐soluble polymers have been extensively utilized for enhanced oil recovery (EOR) due to their strong thickening power to aqueous displacement fluids. However, the typical EOR polymer, high‐molecular‐weight (MW) partially hydrolyzed po…
View article: Phase behavior of CO2-shale oil in nanopores
Phase behavior of CO2-shale oil in nanopores Open
View article: A Multiphase and Multicomponent Model Considering Molecular Diffusion for Simulating Shale Oil Reservoirs With Complex Fracture Networks
A Multiphase and Multicomponent Model Considering Molecular Diffusion for Simulating Shale Oil Reservoirs With Complex Fracture Networks Open
Molecular diffusion is a critical mechanism of enhance oil recovery (EOR) in developing shale oil reservoir by huff “n” puff. The ultra‐low permeability lead to the accumulation of injected gas within the complex fracture networks (CFNs), …
View article: Transformative Stereoscopic CO2 Utilization Strategy for Shale Oil Recovery and Carbon Sequestration: A Comprehensive Investigation of the Gulong Shale, China
Transformative Stereoscopic CO2 Utilization Strategy for Shale Oil Recovery and Carbon Sequestration: A Comprehensive Investigation of the Gulong Shale, China Open
View article: Fluid Flow Behavior in Nanometer-Scale Pores and Its Impact on Shale Oil Recovery Efficiency
Fluid Flow Behavior in Nanometer-Scale Pores and Its Impact on Shale Oil Recovery Efficiency Open
Shale oil reservoirs, as an unconventional hydrocarbon resource, have the potential to substitute conventional hydrocarbon resources and alleviate energy shortages, making their exploration and development critically significant. However, …
View article: Study on the adsorption and deformation laws of multi-components in shale oil with nanopores——insights from the molecular simulation
Study on the adsorption and deformation laws of multi-components in shale oil with nanopores——insights from the molecular simulation Open
The development of shale oil reservoirs is significant for the petroleum industry. Fluids in shale oil play exist in nanoscale pores, and the interaction between fluids and shale rock surface walls can lead to the expansion and deformation…
View article: Research progress and potential of new enhanced oil recovery methods in oilfield development
Research progress and potential of new enhanced oil recovery methods in oilfield development Open
This paper reviews the basic research means for oilfield development and also the researches and tests of enhanced oil recovery (EOR) methods for mature oilfields and continental shale oil development, analyzes the problems of EOR methods,…
View article: Optimal design of gas injection development method for enhanced recovery in terrestrial shale oil reservoir
Optimal design of gas injection development method for enhanced recovery in terrestrial shale oil reservoir Open
This study investigates the shale oil drainage characteristics from the Gulong Sag, The objective is to clarify the development method for effective recovery enhancement of terrestrial shale oil. The investigation employs elastic depletion…
View article: A technique for enhancing tight oil recovery by multi-field reconstruction and combined displacement and imbibition
A technique for enhancing tight oil recovery by multi-field reconstruction and combined displacement and imbibition Open
A seepage-geomechanical coupled embedded fracture flow model has been established for multi-field coupled simulation in tight oil reservoirs, revealing the patterns of change in pressure field, seepage field, and stress field after long-te…
View article: Pore-scale imbibition patterns in layered porous media with fractures
Pore-scale imbibition patterns in layered porous media with fractures Open
The presence of fractures increases the difficulty of flow mechanisms analysis, and it remains unclear how fractures affect multiphase flow displacement in the layered rock matrix. Herein, a pore-scale imbibition model considering the laye…
View article: Determination of Minimum Miscible Pressure and Phase Behavior of CO<sub>2</sub>–Shale Oil in Nanopores
Determination of Minimum Miscible Pressure and Phase Behavior of CO<sub>2</sub>–Shale Oil in Nanopores Open
CO 2 injection into shale oil reservoirs has gained widespread attention as it not only enhances oil recovery but also facilitates the geological storage of CO 2 . Shale oil reservoirs are characterized by numerous nanopores, and the resid…
View article: Research on the Performance of New Weighted Slippery Water Fracturing Fluid System
Research on the Performance of New Weighted Slippery Water Fracturing Fluid System Open
View article: Pore Fluid Movability in Fractured Shale Oil Reservoir Based on Nuclear Magnetic Resonance
Pore Fluid Movability in Fractured Shale Oil Reservoir Based on Nuclear Magnetic Resonance Open
Gulong shale oil is found in a typical continental shale oil reservoir, which is different from marine shale oil reservoirs. The Gulong shale oil reservoir is a pure shale-type oil reservoir with abundantly developed nanoscale pores, makin…
View article: Study on the Nanopore Deformation Mechanisms in Shale Oil Reservoir: Insights from the Molecular Simulation
Study on the Nanopore Deformation Mechanisms in Shale Oil Reservoir: Insights from the Molecular Simulation Open
The stress and adsorption motivation deformation during shale oil production directly affect its development dynamics. First, a mathematical simulation of pore deformation in shale oil under stress motivation is established. We analyzed th…
View article: A semi-analytical model for coupled flow in stress-sensitive multi-scale shale reservoirs with fractal characteristics
A semi-analytical model for coupled flow in stress-sensitive multi-scale shale reservoirs with fractal characteristics Open
A large number of nanopores and complex fracture structures in shale reservoirs results in multi-scale flow of oil. With the development of shale oil reservoirs, the permeability of multi-scale media undergoes changes due to stress sensiti…
View article: Quantitative evaluation of water-alternative-natural gas flooding in enhancing oil recovery of fractured tight cores by NMR
Quantitative evaluation of water-alternative-natural gas flooding in enhancing oil recovery of fractured tight cores by NMR Open
As the associated gas of tight reservoirs, natural gas is abundant and noncorrosive, which is more suitable for the development of tight oil reservoirs in China. However, the mechanism of gas injection development is unclear, and the gas c…
View article: Mechanisms of CO2-oil-water interaction and CO2 storage during CO2 huff-n-puff EOR in shale reservoirs based on LB method
Mechanisms of CO2-oil-water interaction and CO2 storage during CO2 huff-n-puff EOR in shale reservoirs based on LB method Open
CO2 has the advantages of strong solubility, good viscosity reduction ability and low miscible pressure, which has a great potential in enhancing oil recovery (EOR).Shale has a high content of organic porous media and clay minerals, which …
View article: Enhanced recovery of tight reservoirs after fracturing by natural gas huff-n-puff: Underlying mechanisms and influential factors
Enhanced recovery of tight reservoirs after fracturing by natural gas huff-n-puff: Underlying mechanisms and influential factors Open
Tight oil resources are abundant in the world. It is very important to strengthen the research on the development theory and technology of tight oil reservoirs for ensuring national energy security. Natural gas huff-n-puff can effectively …
View article: Controlling factors for oil production in continental shales: A case study of Cretaceous Qingshankou Formation in Songliao Basin
Controlling factors for oil production in continental shales: A case study of Cretaceous Qingshankou Formation in Songliao Basin Open
Continental shale oil is widely distributed in the Cretaceous Qingshankou Formation of the Songliao Basin in Northeast China. In the Qijia-Gulong sag and the Changling sag in the Songliao Basin, breakthroughs of shale oil exploration and d…
View article: Key theoretical and technical issues and countermeasures for effective development of Gulong shale oil, Daqing Oilfield, NE China
Key theoretical and technical issues and countermeasures for effective development of Gulong shale oil, Daqing Oilfield, NE China Open
Aiming at the four issues of underground storage state, exploitation mechanism, crude oil flow and efficient recovery, the key theoretical and technical issues and countermeasures for effective development of Gulong shale oil are put forwa…
View article: Characteristics and mechanism of smart fluid for sweep-controlling during CO2 flooding
Characteristics and mechanism of smart fluid for sweep-controlling during CO2 flooding Open
A smart response fluid was designed and developed to overcome the challenges of gas channeling during CO2 flooding in low-permeability, tight oil reservoirs. The fluid is based on Gemini surfactant with self-assembly capabilities, and the …
View article: Enrichment factors of movable hydrocarbons in lacustrine shale oil and exploration potential of shale oil in Gulong Sag, Songliao Basin, NE China
Enrichment factors of movable hydrocarbons in lacustrine shale oil and exploration potential of shale oil in Gulong Sag, Songliao Basin, NE China Open
The geological characteristics and production practices of the major middle- and high-maturity shale oil exploration areas in China are analyzed. Combined with laboratory results, it is clear that three essential conditions, i.e. economic …
View article: Quantitative Analysis of Natural Gas Diffusion Characteristics in Tight Oil Reservoirs Based on Experimental and Numerical Simulation Methods
Quantitative Analysis of Natural Gas Diffusion Characteristics in Tight Oil Reservoirs Based on Experimental and Numerical Simulation Methods Open
As an important mechanism in gas injection development, the diffusion characteristics of natural gas in tight reservoirs are important in the dynamic prediction of the development effect and optimization of injection-production parameters.…
View article: A Comprehensive Review of the Oil Flow Mechanism and Numerical Simulations in Shale Oil Reservoirs
A Comprehensive Review of the Oil Flow Mechanism and Numerical Simulations in Shale Oil Reservoirs Open
The pore structure of shale oil reservoirs is complex, and the microscale and nanoscale effect is obvious in the development of shale oil reservoirs. Understanding the oil flow mechanism in shale reservoirs is essential for optimizing the …
View article: Machine Learning Algorithms for Lithofacies Classification of the Gulong Shale from the Songliao Basin, China
Machine Learning Algorithms for Lithofacies Classification of the Gulong Shale from the Songliao Basin, China Open
Lithofacies identification and classification are critical for characterizing the hydrocarbon potential of unconventional resources. Although extensive applications of machine learning models in predicting lithofacies have been applied to …
View article: A synthetical geoengineering approach to evaluate the largest hydraulic fracturing-induced earthquake in the East Shale Basin, Alberta
A synthetical geoengineering approach to evaluate the largest hydraulic fracturing-induced earthquake in the East Shale Basin, Alberta Open
On 2019-03-04, the largest induced earthquake (ML4.18) occurred in the East Shale Basin, Alberta, and the underlying physical mechanisms have not been fully understood. This paper proposes a synthetical geoengineering methodology to compre…
View article: The Geoscience Frontier of Gulong Shale Oil: Revealing the Role of Continental Shale from Oil Generation to Production
The Geoscience Frontier of Gulong Shale Oil: Revealing the Role of Continental Shale from Oil Generation to Production Open
The clay mineral content of Daqing Gulong shale is in the range of about 35%–45%, with particle sizes less than 0.0039 mm. The horizontal fluidity of oil in Gulong shale is poor, with near-zero vertical flowability. As a result, Gulong sha…