Abstract: The present disclosure provides a high-temperature-resistant deep penetration molecular membrane acid copolymer and a preparation method thereof. The copolymer is formed by polymerizing four raw monomers including 2-acrylamido-2-methylpropanesulphonic acid, vinyl phosphonic acid, alkyl dimethylallyl ammonium chloride, and perfluoropolyether acrylate. The method comprises: S1: mixing and stirring solvent oil, an emulsifier, the alkyl dimethyl allyl ammonium chloride, and the perfluoropolyether acrylate to be dispersed homogeneously to obtain an oil phase; S2: mixing and stirring the 2-acrylamido-2-methylpropanesulphonic acid, the vinyl phosphonic acid, a complexing agent, and distilled water, and adjusting pH to obtain an aqueous phase; S3: slowly dropwise adding the aqueous phase to the oil phase; and S4: introducing nitrogen into the water-in-oil emulsion to remove oxygen, then adding an initiator and carrying out a heating polymerization reaction to obtain copolymer emulsion (i.e.

Abstract: A structural stabilizer for a fiber and proppant complex to enhance proppant migration and placement in a fractured well during propping and a preparation method thereof are provided. The structural stabilizer consists of: water, inorganic salt, kaolinite, nitrogen-doped modified graphene oxide, anionic surfactant, non-ionic alkyl polyglucoside, and polyacrylamide. The structural stabilizer improves bonding between a proppant and a fiber when slick water is used in stimulated reservoir volume (SRV) fracturing, prevents separation of the fiber and the proppant during migration, thereby reducing escape rate of the fiber from the fiber and proppant complex.

Abstract: An image capturing system includes a center point location, and a circular light source ring centered on the center point location. Light sources are on the circular light source ring, and each emit light in one of a number of spectral bandwidths. The image capturing system also includes circular camera rings, where each circular camera ring is centered on the center point location, where each circular camera ring includes camera locations which are equally spaced apart. The image capturing system also includes one or more cameras configured to capture images of an object from each of the camera locations of each particular circular camera ring, where the images captured from the camera locations of each particular circular camera ring are captured in one of the different spectral bandwidths, and where the object is illuminated by the light sources of the light source ring while each of the images are captured.

Abstract: An image capturing system includes a center point location, and a circular light source ring centered on the center point location. Light sources are on the circular light source ring, and each emit light in one of a number of spectral bandwidths. The image capturing system also includes circular camera rings, where each circular camera ring is centered on the center point location, where each circular camera ring includes camera locations which are equally spaced apart. The image capturing system also includes one or more cameras configured to capture images of an object from each of the camera locations of each particular circular camera ring, where the images captured from the camera locations of each particular circular camera ring are captured in one of the different spectral bandwidths, and where the object is illuminated by the light sources of the light source ring while each of the images are captured.