Laboratory Synthesis And Pilot-Scale Study Of Hydrophobically Associating Polymers Containing Anthracene Ring

As an important resource for social economic development and industrial progress,oil occupies an important position in the production process of the national economy.With the advancement of social progress and industrialization,people are increasingly dependent on oil resources and consume more and more oil.The more,the more oil increment depends on some heavy oil reservoirs with harsher reservoir conditions.Therefore,in order to realize the exploitation of heavy oil reservoirs,it is very important to adopt effective heavy oil viscosity reduction technology.This paper adopts the water-soluble viscosity reducer method in the chemical viscosity reduction method,which is relatively mature in application technology and feasible in industrial production.First,based on the hydrophilic and lipophilic properties,the high-viscosity heavy oil is emulsified into a low-viscosity O/W emulsion and can disassemble the hydrogen bonds andπ-πinteractions between the colloids and asphaltenes in the heavy oil.Using acryloyl chloride and polyoxyethylene anthracenol ether as raw materials,triethylamine as acid binding agent and acetone as solvent,the same series of anthracene series fused ring viscosity reducing monomers with different chain lengths,NS,were designed and synthesized.Then anthracene-based fused ring viscosity reducing monomer NS,acrylamide（AM）,2-acrylamido-2-methylpropanesulfonic acid（AMPS）are copolymerized to increase the molecular weight of a single polymer and adjust the initiator the type and amount of addition,the optimization of reaction conditions,the synthesis of superior performance of water-soluble polymer heavy oil viscosity reducer PAN.Use the optimized initiator type,addition amount,and reaction conditions to carry out pilot production in the factory,simulate the operation steps and processes of industrial production,and once again make minor adjustments to the factors affecting the polymerization reaction,so that the original indoor research polymerization initiation system and it is compatible with industrial production equipment.On the basis of micro-adjustment,the pilot scale production is carried out,and the viscosity increasing,temperature resistance,salt resistance,shear aging stability,injection and conductivity of the water-soluble polymer heavy oil viscosity reducer PAN of the pilot product systematic evaluation of performance,viscosity reduction and dehydration,physical simulation of oil displacement performance and microscopic simulation of oil displacement performance.The results show that the introduction of the viscosity reducing monomer N-4 has a significant effect on improving the performance of the polymer.Compared with the HPAM solution of the same concentration,the PAN solution of 1300 mg·L^-1 has its viscosity increasing,temperature resistance,salt resistance and resistance shearability and aging resistance have been increased by at least 31.0%,resistance coefficient has been increased by at least 2 times,and residual resistance coefficient has been increased by at least 1 time.For heavy oils with different viscosities,the viscosity reduction rate of 1300 mg·L^-1 PAN solution can reach more than 90.0%,the automatic dehydration rate of O/W emulsion within 2 h can reach at least 75.0%,and the polymer flooding recovery rate has increased by more than20.0%.PAN has superior performance,meets design requirements and standards,and the quality of the pilot product is qualified,and it can be industrialized.