Abstract: The present disclosure relates to a method for oil displacement using a dispersed particle gel-strengthened polymer ternary composite displacement system.

Abstract: A modified nano graphite, a polymer composite material of the modified nano graphite, and use of the polymer composite material in a high temperature and high salinity oil reservoir.

Abstract: The present disclosure relates to a method for oil displacement using a dispersed particle gel-strengthened polymer ternary composite displacement system.

Abstract: A composite temperature resistance gel plugging agent, a preparation method thereof and Fuse thereof in profile control and water plugging of ultra-deep oil reservoirs.

Abstract: A device and method are for shaping and scanning an ultrafast laser beam. The device includes a laser source configured to output a pulsed laser beam containing different frequency spectrum, a digital micromirror device (DMD) consisting of micromirrors, which are configured to receive the laser beam and shape the received laser beam with computer generated holograms, and a dispersion compensation unit, arranged before or after the DMD, which is configured to transfer the laser beam from the laser source to the DMD with a designated angular dispersion for neutralizing the first angular dispersion introduced by the DMD.

Abstract: The present invention provides a modified nano-graphite particle three-phase foam profile control and flooding system, which comprises a liquid phase and a gas phase, wherein the liquid phase comprises 0.15%-0.35% foaming agent, 0.04-0.1% foam stabilizer, and water that accounts for the remaining content, the sum of weight percentages of above components is 100%; a gas-liquid ratio of the gas phase to the liquid phase is (1-3):1. The foaming agent is selected from one of alkylsulfopropyl betaine and alkylamidopropyl betaine or a combination of them. The foam stabilizer is modified nano-graphite particles in 80-150 nm particle diameter. The present invention further provides a preparation method of the modified nano-graphite particle and a preparation method of the three-phase foam profile control and flooding system.

Abstract: The present invention provides a modified nano-graphite particle three-phase foam profile control and flooding system, which comprises a liquid phase and a gas phase, wherein the liquid phase comprises 0.15%-0.35% foaming agent, 0.04-0.1% foam stabilizer, and water that accounts for the remaining content, the sum of weight percentages of above components is 100%; a gas-liquid ratio of the gas phase to the liquid phase is (1-3):1. The foaming agent is selected from one of alkylsulfopropyl betaine and alkylamidopropyl betaine or a combination of them. The foam stabilizer is modified nano-graphite particles in 80-150 nm particle diameter. The present invention further provides a preparation method of the modified nano-graphite particle and a preparation method of the three-phase foam profile control and flooding system.

Abstract: Methods and systems for axial-scanning a sample. The method may include generating a scanning beam along a transverse scanning direction across the sample; acquiring radial positions of the generated scanning beam along the transverse scanning direction; and determining, based on the radial positions of the generated scanning beam and desired focal lengths, a phase mask so that the scanning beam at different radial positions along the scanning direction is focused to different axial positions of the sample along an optical axis transverse to the scanning direction.

Abstract: A laser manufacturing system capable of fabricating 3-D resolved 2-D patterns. The system includes a pulse laser source generating a laser beam; a reflectance mirror arranged in the propagation path of the laser to reflect the laser, the mirror being controllable to adjust an emergent angle of the laser; a deformable dispersion unit located in the laser receiving path from the reflectance mirror and having an array of micromirrors controllable in response to the adjusted emergent angle to form required laser patterns from the reflected laser, the laser patterns having spatially separated optical spectral components with multiple propagation angles; and one or more focusing optical components positioned in the propagation path of the separated optical spectral components produced by the deformable dispersion unit; the focusing components recombine the optical spectral components at fabrication targets with patterns defined by the deformable dispersion unit.

Abstract: A device for shaping and scanning an ultrafast laser beam including a laser source configured to output a pulsed laser beam containing different frequency spectrum; a digital micromirror device (DMD) consisting of a plurality of micromirrors, configured to receive the laser beam and shape the received laser beam with a first angular dispersion; and a dispersion compensation unit, arranged before or after the DMD, configured to transfer the laser beam from the laser source to the DMD with a second angular dispersion for neutralizing the first angular dispersion.

Abstract: A laser manufacturing system capable of fabricating 3-D resolved 2-D patterns. The system includes a pulse laser source generating a laser beam; a reflectance mirror arranged in the propagation path of the laser to reflect the laser, the mirror being controllable to adjust an emergent angle of the laser; a deformable dispersion unit located in the laser receiving path from the reflectance mirror and having an array of micromirrors controllable in response to the adjusted emergent angle to form required laser patterns from the reflected laser, the laser patterns having spatially separated optical spectral components with multiple propagation angles; and one or more focusing optical components positioned in the propagation path of the separated optical spectral components produced by the deformable dispersion unit; the focusing components recombine the optical spectral components at fabrication targets with patterns defined by the deformable dispersion unit.