Results 61 to 70 of about 2,348 (179)

Experimental and mechanism study on the synergistic influence of asphaltene and pressure on the flow and rheological characteristics of waxy oil

Journal of Pipeline Science and Engineering
In underground reservoirs and offshore oilfields, the production and transportation of waxy oil inevitably involve pressure and asphaltene environment.
Yun Lei, Dehua Lai, Haoran Zhu, Rui Dou, Jiangbo Wen, Hanwen Chen, Haoping Peng, Pengfei Yu   +7 more
doaj   +1 more source

Evaluation of rock and fluid intermolecular interaction between asphaltene and sand minerals using electrochemical, analytical spectroscopy and microscopy techniques

Scientific Reports
Long-time contact of heavy crude oil with rock leads to an adsorption phenomenon, which causes the rock surface to become oil-wet and appears as a barrier to the fluid flow in the porous media.
Jaber Taheri-Shakib, Ali Esfandiarian, Mahyar Rajabi-Kochi, Ezzatallah Kazemzadeh, Mohammad Afkhami Karaei   +4 more
doaj   +1 more source

Prediction of the Gas Injection Effect on the Asphaltene Phase Envelope

Oil & Gas Science and Technology, 2015
Asphaltene instability may occur when pressure, temperature and compositional variations affect the reservoir oil. Permeability reduction, wettability alteration, and plugging of wells and flow lines are the consequences of this phenomenon. Therefore, it
Bahrami Peyman, Kharrat Riyaz, Mahdavi Sedigheh, Firoozinia Hamed   +3 more
doaj   +1 more source

Influencing mechanisms of solid-phase asphaltene precipitation in crude oil of Yongjin Oil Field, Junggar Basin

Shiyou shiyan dizhi
Solid-phase asphaltene precipitation and deposition, commonly occurring during reservoir development, lead to reservoir damage and production well blockage, seriously affecting crude oil exploitation and reducing economic efficiency.
Yang YANG, Dongxiao ZHANG, Hao WANG, Zengmin LUN, Zhiwei GAO, Rui WANG, Wei HU   +6 more
doaj   +1 more source

Investigation of Asphaltene Stability in the Iranian Crude Oils [PDF]

Iranian Journal of Chemical Engineering, 2008
The influence of different factors on the asphaltene stability in three iranian crude oils was evaluated. Compositional studies and structural characterization of resins and asphaltenes were carried out in order to study a possible relationship between ...
doaj  

Research Progress in Nanoparticle Inhibitors for Crude Oil Asphaltene Deposition

Molecules
Currently, the alteration of external factors during crude oil extraction easily disrupts the thermodynamic equilibrium of asphaltene, resulting in the continuous flocculation and deposition of asphaltene molecules in crude oil.
Shuangchun Yang, Chenhui Yan, Jiatie Cai, Yi Pan, Qiuju Han   +4 more
doaj   +1 more source

Investigating the mechanism of interfacial tension reduction through the combination of low-salinity water and bacteria

Scientific Reports
In the enhanced oil recovery (EOR) process, interfacial tension (IFT) has become a crucial factor because of its impact on the recovery of residual oil.
Arastoo Abdi, Behnam Ranjbar, Yousef Kazemzadeh, Farzaneh Aram, Masoud Riazi   +4 more
doaj   +1 more source

Exploring the Effect of Relaxation Time, Natural Surfactant, and Potential Determining Ions (Ca2+, Mg2+, and SO42−) on the Dynamic Interfacial Tension Behavior of Model Oil-Brine Systems

Heliyon
This study examined how the concentration of asphaltene and divalent ions in various salinities affects the interfacial tension (IFT) between a model oil/brine using the pendant drop method. The oleic phase consisted of a mixture of toluene and n-heptane
Amir Mohammadi, Mahsa Parhizgar Keradeh
doaj   +1 more source

Mechanistic understanding of asphaltene precipitation and oil recovery enhancement using SiO2 and CaCO3 nano-inhibitors

Scientific Reports
Asphaltene precipitation in oil reservoirs, well equipment, and pipelines reduces production, causing pore blockage, wettability changes, and decreased efficiency.
Ali Shadervan, Arezou Jafari, Alireza Teimouri, Reza Gharibshahi, Amir Hossein Saeedi Dehaghani   +4 more
doaj   +1 more source

Modeling of asphaltene precipitation - part I: comparative study for asphaltene precipitation envelope prediction methods

Iraqi Journal of Chemical and Petroleum Engineering
   The solubility of asphaltenes in crude oils is predominantly influenced by variations in temperature, pressure, and oil composition. These alterations can precipitate asphaltene deposition, resulting in diminished permeability, obstruction of wells ...
Ali A. Ali, Ghassan Hameed Abdul-Majeed, Abdalellah O. Mohmmed   +2 more
doaj   +1 more source