In the field of oil drilling, the application of chemical additives is becoming more and more widespread. Among them, oil drilling grade CMC (carboxymethyl cellulose) and PAC (partially hydrolyzed polyacrylamide) are key mud materials and play an indispensable role. They show significant advantages in improving drilling efficiency, protecting wellbore stability and optimizing drilling fluid Performance .
Oil drilling grade CMC, as a water-soluble polymer compound, has been widely used in oil drilling for its good thickening, suspension and emulsification properties. During the drilling process, it can increase the viscosity and shear force of the mud, thereby improving the mud's ability to carry cuttings and prevent cuttings from depositing at the bottom of the well. At the same time, CMC Também pode reduzir efetivamente a perda de filtração da lama, reduzir os danos à camada de petróleo e gás e proteger a capacidade de produção original do reservatório .
As another important mud treatment agent, PAC has excellent viscosity increase, filtration loss reduction and flocculation properties due to its unique molecular structure. PAC can increase the plastic viscosity and dynamic shear force of the mud, so that it can maintain stable rheological properties under high temperature and high pressure environment. During the drilling process, PAC can effectively control the filtration loss of the mud and form a dense mud Bolo, melhorando assim a estabilidade da parede do poço . Além disso, o PAC também pode promover a floculação e sedimentação de fases sólidas nocivas na lama para manter a limpeza da lama .
In practical applications, the reasonable combination of CMC and PAC can significantly improve the overall performance of the mud. They can not only meet the drilling needs under complex formation conditions, but also effectively extend the service life of the drill bit and reduce drilling costs. As oil wells become deeper and deeper, geological conditions become more and more complex, and the requirements for mud materials become higher and higher, the application prospects of CMC and PAC será mais amplo .
Dominar as vantagens de desempenho do CMC e PAC é de grande importância para melhorar a eficiência da perfuração de petróleo e otimizar o desempenho do fluido de perfuração .
