Abstract
Polyacrylamide (PAM) is a linear water-soluble polymer, which is one of the most widely used varieties. Partially hydrolyzed polyacrylamide (HPAM) is currently widely used in domestic oilfield tertiary oil recovery. Practice has proved that the use of HPAM as a polymer flooding to improve oil recovery (EOR) effect is obvious, and has become the oil and gas production in the middle of a crucial part. Theoretically, polyacrylamide can play a role in mediating the rheological properties of water injection, increasing the viscosity of the driving fluid, improving the efficiency of water flooding and so on. However, in practical applications, it is necessary to select polyacrylamide with different molecular morphology or molecular weight according to the difference of geological environment conditions such as dielectric porosity and various ionic components and contents in groundwater. Therefore, it is of great theoretical and practical significance to correctly evaluate the molecular chain morphology of polyacrylamide in different geological environments and to make more effective use of existing resources for rationally explaining the mechanism of polymer flooding. In this study, through the detailed study on the properties of partially hydrolyzed polyacrylamide, it can be applied to oil and gas exploitation in oil field, which can provide reference for oil and gas recovery.
