The behaviors of gas-liquid two-phase flow under gas kick during horizontal drilling with oil-based muds
March 2024
Natural gas is easily soluble in oil-based muds (OBM), leading to complex flow behavior in wellbores, especially in horizontal wells. In this study, a new transient flow model considering wellbore-formation...
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An optimal flow rate allocation model of the oilfield treated oil pipeline network
March 2024
Oilfield treated oil pipeline network is the link connecting the upstream oilfields and the downstream refineries. Due to the differences in operating costs and transportation fee between different...
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Application status and research progress of CO2 fracturing fluid in petroleum engineering: A brief review
March 2024
This paper comprehensively reviews the application and research progress of CO2 fracturing fluids in China, highlights the existing issues and puts forward suggestions for future development. Three...
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Application of fuzzy comprehensive evaluation method to assess effect of conformance control treatments on water-injection wells
March 2024
As an effective method to prolong the life of mature field, conformance control in water-injection well has been used wildly. Naturally, effect evaluation of conformance control has attracted great...
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Application of supervised machine learning to predict the enhanced gas recovery by CO2 injection in shale gas reservoirs
March 2024
The technique of Enhanced Gas Recovery by CO2 injection (CO2-EGR) into shale reservoirs has brought increasing attention in the recent decade. CO2-EGR is a complex geophysical process that is controlled...
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Optimizing sampling frequency of surface and downhole measurements for efficient stick-slip vibration detection
March 2024
Drilling vibrations significantly impact drilling operations with high costs due to early downhole equipment failure and loss of productive time. Stick-slip vibrations, a severe form of torsional vibrations,...
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Chemical-assisted MMP reduction on methane-oil systems: Implications for natural gas injection to enhanced oil recovery
March 2024
Miscible natural gas injection is widely considered as a practical and efficient enhanced oil recovery technique. However, the main challenge in this process is the high minimum miscibility pressure...
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The optimal semi-analytical modeling for the infinite-conductivity horizontal well performance under rectangular bounded reservoir based on a new instantaneous source function
March 2024
The main objective of this study is to develop the optimal semi-analytical modeling for the infinite-conductivity horizontal well performance under rectangular bounded reservoir based on a new instantaneous...
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Kriging-boosted CR modeling for prompt infill drilling optimization
March 2024
The capacitance-resistance model (CRM) has been a useful physics-based tool for obtaining production forecasts for decades. However, the model's limitations make it difficult to work with real field...
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Intelligent solubility estimation of gaseous hydrocarbons in ionic liquids
March 2024
The research focuses on evaluating how well new solvents attract light hydrocarbons, such as propane, methane, and ethane, in natural gas sweetening units. It is important to accurately determine the...
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Application status and prospect of ionic liquids in oilfield chemistry
March 2024
The ionic liquid, as a new treatment agent, has been increasingly applied in oil fields due to its strong temperature resistance, good solubility and high surface activity. In this paper, we systematically...
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A new mixed type crack propagation criterion in shale reservoirs
March 2024
Hydraulic fracturing is a mainstream technology for unconventional oil and gas reservoirs development all over the world. How to use this technology to achieve high-level oil and gas resource extraction...
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Mottled dolomite in the lower Cambrian Longwangmiao formation in the Northern Sichuan Basin, South China
March 2024
At the end of Early Cambrian time, the Sichuan basin (South China) was located in a wide carbonate platform, with hundreds of meters of carbonate deposited. The Longwangmiao Formation carbonate in Sichuan...
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Auto-tuning PVT data using multi-objective optimization: Application of NSGA-II algorithm
March 2024
Reservoir simulation is known as perhaps the most widely used, accurate, and reliable method for field development in the petroleum industry. An integral part of a reliable reservoir simulation process...
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Performance of evolutionary optimized machine learning for modeling total organic carbon in core samples of shale gas fields
March 2024
Rock samples' TOC content is the best indicator of the organic matter in source rocks. The origin rock samples’ analysis is used to calculate it manually by specialists. This method requires time and...
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Integrated reservoir characterization of the Permo-Triassic gas reservoirs in the Central Persian Gulf
Available online 5 February 2024
The Upper Dalan and Kangan or Permian-Triassic carbonate formations in the central the Persian Gulf are considered as world’s giant gas reservoirs. The primary purpose of this research is to model and...
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High-pressure capacity expansion and water injection mechanism and indicator curve model for fractured-vuggy carbonate reservoirs
Available online 10 January 2024
Water injection for oil displacement is one of the most effective ways to develop fractured-vuggy carbonate reservoirs. With the increase in the number of rounds of water injection, the development...
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Experimental study of water imbibition characteristics of the lacustrine shale in Sichuan Basin
December 2023
Through the stimulation method of large-scale hydraulic fracturing, the spontaneous imbibition capacity of the water phase in the shale reservoir has great influence on the effect of stimulation. Generally,...
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Pore scale numerical investigation of counter-current spontaneous imbibition in multi-scaled pore networks
December 2023
The multi-scaled pore networks of shale or tight reservoirs are considerably different from the conventional sandstone reservoirs. After hydraulic fracturing treatment, the spontaneous imbibition process...
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Shale gas potential of the lower Silurian hot shales in southern Iran and the Arabian Plate: Characterization of organic geochemistry
December 2023
A significant phase of global warming appeared during the Llandovery and productive Silurian hot shale was preserved all over the world. The lower Silurian shale is the main effective source rock for...
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In-service performance of emergency shutdown valves and dependent operational relationships in the offshore oil and gas industry
December 2023
Industrial process plants use emergency shutdown valves (ESDVs) as safety barriers to protect against hazardous events, bringing the plant to a safe state when potential danger is detected. These ESDVs...
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A large-scale experimental simulator for natural gas hydrate recovery and its experimental applications
December 2023
To facilitate the recovery of natural gas hydrate (NGH) deposits in the South China Sea, we have designed and developed the world's largest publicly reported experimental simulator for NGH recovery....
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Systematic experimental study of the temperature dependence of viscosity and rheological behavior of water-based drilling fluids with nano-additives
December 2023
The paper presents the results of a systematic study of the influence of nano-additives of various concentrations, average sizes and composition on the temperature dependence of the viscosity and rheological...
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Comparative study on the inhibiting mechanism of inhibitor with primary amine groups and quaternary ammonium groups for sodium bentonite
December 2023
Shale hydration and swelling is the main obstacle to the development of shale gas utilizing water-based drilling fluids (WBDFs). In this work, the inhibition mechanism of alkylammonium inhibitor and...
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Evaluation on the anisotropic brittleness index of shale rock using geophysical logging
December 2023
The brittleness index plays a significant role in the hydraulic fracturing design and wellbore stability analysis of shale reservoirs. Various brittleness indices have been proposed to characterize...
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