الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
During crude oil production, asphaltene precipitation can cause formation damage in near-wellbore regions by partially or completely plugging of the pore space. Asphaltene precipitation followed by deposition can plug the subsurface and surface tubing. During crude oil transportation, asphaltenes precipitation and deposition can plug transportation pipelines and settle in transportation tankers. In the refineries, asphaltenes can deposit in distillation columns, foul heat exchangers, and also cause catalyst deactivation. These problems lead to a significant loss of productivity and a high cost of remediation. The addition of certain aromatic solvents in bulk volumes can prevent the growth and aggregation of asphaltenes. The nature of molecular asphaltenes in crude oil provides another suggestion; native resins and other more aromatic components of crude oil can stabilize asphaltenes in suspension. Indeed, amphiphilic molecules and certain classes of surfactants have been shown to interact favorably with asphaltene molecules for increased stability. While polymeric or amphiphilic dispersants may provide metastability only, they may still suffice to address operational issues caused by asphaltenes. Polymeric dispersants impart a degree of metastability to the system and can greatly delay the sedimentation dynamics. Because of the economic concerns about asphaltene precipitation and deposition, chemicals for asphaltenes control (asphaltene inhibitors) have become important in the oil industry. So, this study involved in the first section synthesis of asphaltene dispersant/inhibitors base on poly(dodecyl phenol formaldehyde) resin (PDPF) namely PDPF1, PDPF2, PDPF3, PDPF4, PDPF5, PDPF6, PDPF7 and PDPF8 have a difference in their molecular weights, and react the prepared copolymer PDPF with poly(oxypropylene) to introduce block copolymers namely PDPF1-b-POP, PDPF2-b-POP, PDPF4-b-POP, PDPF6-b-POP and PDPF7-b-POP.