Laboratory study and field application of amphiphilic molybdenum disulfide nanosheets for enhanced oil recovery

Effect Analysis and Recognition of 2-D Black Nano-SHEET in Different Karst Reservoirs in Tahe Oilfield

“…It can be seen from Figure 5 that since the sheet-like structure of the black nano-sheet is in the same order of magnitude as the size of the colloidal asphaltene macromolecules, the viscosity reduction mechanism mainly relies on the black nano-sheet infiltrating into the layered structure of the colloidal asphaltene to destroy the C-S bond, The overlapping aggregates are disassembled, their continuous state is broken, and the crude oil is emulsified into a micro-nano-scale O/W emulsion, thus forming a viscosity reduction [17,18,20].…”

“…A 2.5×10 cm low-permeability sandstone core was used to carry out the displacement experiment of the black nano-sheet, and the PV number of the pores injected into the black nano-sheet was recorded, and then the subsequent water flooding was carried out [19,20]. The spectrophotometer was used to measure, and finally the retention rate of the black nano-sheet in the core was less than 15.4%.…”

Using starch graft copolymer gel to assist the CO2huff-n-puff process for enhanced oil recovery in a water channeling reservoir

“…Wettability alteration, interfacial tension (IFT) reduction, emulsication and solubilization are usually associated with the NPs, however, further EOR mechanisms still need to be clearly determined during NP ooding. [18][19][20][21] For further EOR during the CO 2 injection process, water alternating-gas (WAG) is commonly used because water injection is helpful for improving the macroscopic sweep efficiency, and the water/gas slug ratio needs to be carefully designed to obtain a favorable oil recovery. 22,23 Nitrogen (N 2 ) is also used to assist with CO 2 injection due to its strong ability of pressure maintenance, however, its applications are limited in coal bed methane or pressure depleted oil reservoirs.…”

“…Wettability alteration, interfacial tension (IFT) reduction, emulsification and solubilization are usually associated with the NPs, however, further EOR mechanisms still need to be clearly determined during NP flooding. 18–21…”

Assessing financial factors for oil supply disruptions and its impact on oil supply security and transportation risks

“…For instance, during this period of rapid development, industrialization often occurs, leading to a spike in demand for energy, especially fossil fuels, in the context of developing nations, which in turn has negative effects on the environment. However, once economic growth reaches a certain level, the technique effect kicks in, effectively canceling out the trade-off between economic expansion and environmental degradation through the medium of technological progress (Qu et al 2022 ). The EKC hypothesis is a set of postulates that advocates for a connection between GDP growth and environmental quality in the form of an inverted U.…”