Polyacrylamide and its derivatives are the most widely used industrial water-soluble acrylic polymers due to their low cost high molecular weight. In drilling, there is a great demand for associating copolymers of acrylamide hydrophobic comonomers. Therefore, processes synthesis hydrolysis copolymer maleic acid were studied obtain drilling fluid stabilizers. The highest viscosity characteristic...

The polymer recovery efficiency of cationic polyacrylamide (PAM) has been evaluated for use as flooding in the Basra oil reservoir Initially, rheological, physical and petro were studied. Additionally, core experiment tested to see how well PAM solutions can be recovered. comparative study between experimental numerical solution accomplished terms rheological properties , relative permeability ...

Abstract The diversion efficiency measures the acid capacity to change its flow direction lower permeability reservoir sections. A good diverter creates a tortuous (zigzagged) wormhole within acidized core sample in laboratory setup. Here, we studied two different diverters compared conventional hydrochloric (HCl) investigate their changing inside rock core. Nuclear magnetic resonance (NMR) can...

Abstract A two‐step process, with anionic hydrolyzed polyacrylamide (HPAM) and cationic poly(vinylbenzyl trimethylammonium chloride) (PVBTMAC), was used to flocculate oil sands mature fine tailings (MFT). The charge density of HPAM the dosages PVBTMAC were varied maximize dewatering MFT minimize turbidity supernatant. dual flocculant system performed better at lower doses than when alone. best ...

High molecular weight polymers are widely used in oilfield applications, such as chemical enhanced oil recovery (cEOR) technique for hydrocarbon recovery. However, during flow a porous rock, polymer retention is usually major challenge, it may result the decrease of concentration or lead to plugging pores with significant permeability reduction and injectivity loss. Hence, an understanding mech...

The herpes simplex virus-1 (HSV-1) utilizes cell-surface glycosaminoglycan, heparan sulfate, to gain entry into cells and cause infection. In a search for synthetic mimics of heparan sulfate to prevent HSV infection, we discovered potent inhibitory activity arising from sulfation of a monomeric flavonoid. Yet, detailed screening indicated that the sulfated flavonoid was completely inactive and ...

Poly-γ-glutamic acid (γ-PGA), one type of amino acid polymers, consists of D-and L-glutamic acids linked with amide bonding between α-amino and γ-carboxylic acids. Naturally, γ-PGA could be biodegradable polymer and water-solubleapplied in various industries such as food, cosmetics, and pharmaceutical industries. Variation of initial L-glutamic acid concentration affecting on the production of ...