Study On The Compounding Method Of A New High Temperature Foaming Agent And Its Performance Evaluation

In the process of steam injection production,gas channeling usually occurs in the heavy oil reservoir.A large amount of steam enters into the high permeability layer or large pores,making it difficult to disaplace the crude oil in the middle and low permeability layer,which reduces the efficiency of steam injection.In the process of steam inection,high temperature resistant foaming agent and the condensate gas bubbles in formation channel,can increase the viscosity and decrease the permability of steam of steam,significantly reduce the mobility of the steam,have limited gravity overlap,to reduce the gas channeling,improving injection profile and steam distribution,delay the gas breakthrough,improve the vertical and plane sweep efficiency,etc.Because of the high temperature under steam flooding,many foaming agents with good performance at low temperature will lose their effect.In this paper,graphene oxide and graphene-based hydrophilic asymmetric nanosheets were first synthesized,and the newly synthesized graphene-based hydrophilic asymmetric nanosheets were characterized by microstructure analysis,infrared spectroscopy and thermal weightlessness analysis.The nanosheets were characterized,and the characterization results showed that the prepared graphene based hydrophilic asymmetric nanosheets were then purified by separation and purification of components of petroleum sulfonate and analysis of the factors affecting the separation of components,and proposed separation and purification.The compounded petroleum sulfonate and graphene-based hydrophilic asymmetric nanosheets were screened with oil-water interfacial tension and high-temperature foaming performance,and the optimal compounding ratio was 7:3;systematic evaluation of petroleum sulfonic acid the foaming performance,plugging property,salt resistance and interface performance of the salt before and after compounding,the experimental results show that the foaming performance,plugging property,salt resistance and interface performance of the petroleum sulfonate after compounding are all certain the degree of improvement;evaluation of the foaming performance,plugging property and salt resistance of petroleum sulfonates after high temperature aging.The experimental results show that high temperature aging will greatly reduce the performance,but the performance of all aspects of the petroleum sulfonate after compounding is significantly better than before compounding;the oil displacement performance of the petroleum sulfonate after compounding is evaluated.The yield range is around 7%.Deepen the understanding of the high temperature resistant mechanism of the foamingagent oil displacement system,build a high temperature resistant foaming agent oil displacement system,and provide technical support and scientific basis for the high temperature resistant foaming agent system optimization,formulation design and field application.