Machine learning classification algorithm screening for the main controlling factors of heavy oil CO2 huff and puff
Available online 13 April 2024
CO2 huff and puff technology can enhance the recovery of heavy oil in high-water-cut stages. However, the effectiveness of this method varies significantly under different geological and fluid conditions,...
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Laser Drilling Through Hashma Sandstone
Available online 12 April 2024
The application of laser in the drilling and perforation of oil wells can achieve great benefits such as reduced drilling costs and time with a higher rate of penetration (ROP) and elimination of casing...
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The discrete-imitation modeling concept of the “sucker-rod pump-well-reservoir” system and the optimization of the pumping process
Available online 8 April 2024
A new approach to dynamic modeling based on a discrete-imitation concept has been developed. The fundamentals, including terms and principles of the concept, have been explained. The presented concept...
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Assessment of the ecological state of haplic chernozem contaminated by oil, fuel oil and gasoline after remediation
March 2024
The intensive use of petroleum hydrocarbon products has made them priority environmental pollutants. When petroleum hydrocarbons enter the soil, a change in physical, chemical, and biological properties...
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Study of asphaltene reaggregation in toluene/heptane mixture by dynamic and static light scattering
March 2024
This paper presents the study of the effect of multiple ultrasonic impacts on submicron asphaltene aggregates in a toluene/heptane solution, conducted with dynamic light scattering technique. The objects...
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Characteristics and genesis of tuffaceous shale oil lithofacies:A case study of Lucaogou Formation in Santanghu Basin
March 2024
Lucaogou Formation in the Santanghu Basin is a special lacustrine fine-grained sedimentary deposits rich in volcanic debris and carbonate, with abundant shale oil resources. However, understanding of...
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Optimization of gas lift system for well performance improvement in Asmari formation: A techno-economic perspective
March 2024
Well productivity in the Asmari carbonate formation of southwest Iran has decreased in recent years as a result of production issues. The production rate must be maintained below 1500 STB/day to prevent...
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Modeling environmental sensitivity and risk assessment of PAHs in sediments along two marine coastal areas in Egypt
March 2024
Modeling the environmental sensitivity index (ESI) is vital in the planning and management processes, especially along the coastal areas. The main objectives of the study were to define the main sources...
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Microfiltration, ultrafiltration and nanofiltration as a post-treatment of biological treatment process with references to oil field produced water of Moran oilfield of Assam
March 2024
The selection of an apt technology for the treatment of Oilfield Produced Water (OFPW) depends mainly on the quality of OFPW and methods of pre-and post-treatment processes. The most challenging part...
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Modeling displacement flow inside a full-length casing string for well cementing
March 2024
While computer modeling of annular displacement efficiency is widely applied in cementing engineering, modeling the displacement flow inside a casing or drill string for cementing operations has received...
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n-Alkane bound biomarker fingerprints from asphaltenes in the bitumens of Eastern Dahomey Basin, Nigeria: Source and genetic implications
March 2024
The asphaltene fractions of the bitumens of Eastern Dahomey Basin in Nigeria, were analyzed by flash pyrolysis-gas chromatography (Py-GC) method in order to unravel its geochemical history and properties....
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Voids size distribution in gelled waxy crude oil under dynamic and static cooling
March 2024
Waxy crude oil is known for its high wax contents that can potentially result in gelling following sufficient cooling of the transportation line in the subsea bed at offshore fields. The gelling over...
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Employment of mud-pulse generator for improvement of efficiency of a wellbore producing in complex mining and geological conditions
March 2024
In this study, the employment of mud-pulse generators to improve the efficiency of wellbores under complex mining and geological conditions is examined. A systemic analysis is made of the primary theoretical...
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Effects of synthesis parameters on the performance of crosslinked Co-polymers with clays for conformance control
March 2024
Conformance control or water shut-off is a technique used to improve oil recovery. During conformance control, polymers block high permeability water areas and redistribute water drive toward unswept...
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A contrasting analysis of CO2 and N2 foam flood for enhanced oil recovery and geological storage of CO2
March 2024
Foam flooding using CO2 has emerged as a promising method for both enhanced oil recovery (EOR) and the storage of CO2 in geological reservoirs. This study conducts a thorough analysis of the behavior...
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Diverting agents in the oil and gas industry: A comprehensive analysis of their origins, types, and applications
March 2024
During the life of a well, treatments are carried out to boost productivity by stimulating initially unproduced zones. These treatments include hydraulic fracturing, matrix acidization, and acid fracturing,...
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High resolution sequence stratigraphy of the Mishrif Formation (Cenomanian-Early Turonian) at zubair oilfield (al-rafdhiah dome), southern Iraq
March 2024
The Mishrif Formation (Cenomanian -E Turonian) is one of the most important geological formations in the Middle East and Iraq because it contains enormous petroleum accumulations. It is considered to...
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Developing a phenomenological model to simulate single and mixed scale formation during flow in porous media: Coupling a salt precipitation model with an ion transport equation under dynamic conditions
March 2024
Water flooding and pressure maintenance are recommended to improve oil recovery practices after low recovery of petroleum reservoirs occurs during primary production. Salt crystal formation is a frequent...
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Experimental investigation of the impact of soybean oil-derived surfactant as a surface-active agent during gas well deliquification
Available online 28 March 2024
The inability of the gas rate to overcome the gas critical (minimum) flow rate leads to liquid loading in a gas well. To avoid premature well shut-in, the injection of surfactants is one of the standard...
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Reservoir identification of marine facies carbonate shoals in the Middle Permian in the Sichuan Basin
Available online 27 March 2024
Controlled by the base level change cycle, the carbonates exposed from the periodically shallowed water body at the top of the high-frequency sequence develops multiple sets of thin reservoirs. Such...
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Reliability of permanent downhole systems: Minimum sample and quality index
Available online 26 March 2024
Permanent downhole monitoring systems are responsible for measuring pressure and temperature time series and enable uninterrupted reservoir characterization during the oil field production period, playing...
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Research on slim-hole drilling technology for shale gas geological survey in China
Available online 25 March 2024
Over the last 10 years, the China Geological Survey has deployed 137 slim-hole shale gas geological exploration wells for coring entire wellbores. These wells are primarily located in new blocks and...
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Empirical study of magnetohydrodynamic effect on fluid flow in clayey porous media
Available online 25 March 2024
Enhancing oil recovery from clayey reservoirs is a significant challenge in petroleum industry due to complex interactions between fluids and rock surfaces, particularly clay swelling. This study presents...
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Enhancing production monitoring: A back allocation methodology to estimate Well flow rates and assist Well test scheduling
Available online 22 March 2024
Production flow rates are crucial to make operational decisions, monitor, manage, and optimize oil and gas fields. Flow rates also have a financial importance to correctly allocate production to fiscal...
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Sedimentary microfacies of Member 5 of Xujiahe Formation in the Dongfengchang area, Sichuan Basin
Available online 21 March 2024
Member 5 of the Upper Triassic Xujiahe Formation (T3X5) in central Sichuan Basin has made a breakthrough in exploration recently. However, this new stratum has not been investigated sufficiently with...
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