A polymer is a high molecular weight compound that is linked by one or several structural units by covalent bonds. Also known as polymer compounds. The macromolecular chain is a combination of structural units and covalent bonds. Many macromolecular chains are aggregated into a polymer material through intermolecular interaction. Therefore, the polymer structure can be divided into a chain structure and an aggregate structure.
The composition of the interaction between the polymer and the polymer, the viscosity reducing agent is to break up part of the structure of these structures and to reduce viscosity. The performance of polymer drilling fluids is not perfect, and some problems are encountered in field applications. Further research is needed to solve the problem. Polymer drilling fluid plays a role in drilling operations and protecting oil and gas layers. The strict requirements have led to rapid development of drilling fluid technology. After years of research and development and production practices, drilling fluids have evolved from drilling drills to drilling fluid systems that meet all needs. The polymer drilling fluid developed in recent years has been further improved in terms of inhibition and flow pattern adjustment, laying a solid foundation for future development. The development of polymer drilling fluid must be broad!
Water-soluble polymers are widely used in many industrial fields (such as mining, tertiary oil recovery, paint manufacturing, sewage treatment, industrial water, etc.). The aqueous solution of polyacrylamide has a very high viscosity, and it can form hydrogen bonds with many compounds. In practical applications, the polymer is used in combination with a surfactant to improve its performance. Therefore, research on water-soluble polymers and surfactants The interaction between the two has important theoretical and practical significance. Different types of polyacrylamide, hydrophobically modified polyacrylamide and cationic Gemini surfactant were synthesized, and the interaction between various polyacrylamide and cationic surfactants was studied. Hydrophobicity was also studied. The interaction between modified polyacrylamide and different types of surfactants.
The experimental results show that the main driving force of the interaction between polymer and surfactant is hydrophobic interaction, and it is proved that the electrostatic interaction between water-soluble polymer and surfactant also has an important influence on the interaction between the two. . Gemini surfactants have superior properties over their corresponding general single-chain surfactants, such as better water solubility, wettability and foaming, lower critical micelle concentration (CMC) values, and more efficient Reduce the performance of the surface tension of the surface (boundary) and so on.
After decades of development in polymer oilfield application technology, a series of effective technologies for oil well drilling, water control and oil stabilization, and improvement of water flooding development have been formed to adapt to different reservoir conditions. After the polymer is injected into the oil layer, thermal degradation and further hydrolysis occur under high temperature conditions, which destroys the stability of the polymer and greatly reduces the oil displacement effect of the polymer. At the same time, the mineralization of the formation water and the injected water is favorable for the polymer to be thickened. Because of the high salinity of water, the viscosity of the polymer can be lowered, the amount of polymer injected can be increased, thereby increasing the cost, which is not conducive to the application of polymer flooding. Therefore, it is necessary to increase the intensity in the research of temperature resistance and salt resistance. The suitable additives are screened out so that the oil displacing agent not only has strong viscosity, but also has good stability.
In the tertiary mining of crude oil, the polymer is widely used in various links. The quality and characteristics of the polymer, especially under special shearing conditions, directly affect the effect after driving into the oil well, and whether it can be better and more mined. The residual crude oil viscosity is an important indicator. Viscosity detection is especially important.
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