New method for elastic determination of particle profile control agent

Abstract

The invention belongs to a new method for elastic determination of a particle profile control agent. The new method comprises the following steps: (1) expressing a resilience factor of a particle profile control agent (described in the specification); (2) screening the profile control agent; (3) preparing an experimental sample; (4) measuring piston height H0 under the initial atmospheric pressurecondition; (5) setting a pressure corresponding to piston height H1 and measuring; (6) determining a resilience height H2, namely a pumping pressure is released when a device is pressurized to a setpressure 4MPa and simultaneously recording a relation curve showing that the resilience height H2 of a piston varies along with time after the particle profile control agent is freely expanded; and (7) performing data processing, namely according a resilience factor calculation formula, giving a relation curve showing that the resilience factor varies along with the time, reading a value of the curve when the curve is smooth and steady and taking the value as the resilience factor under the condition.

Description

technical field [0001] The present invention is a new method for systematic research and evaluation of deep profile control agent for ASP flooding, and specifically relates to particle-type profile control in the field of water plugging and profile control of oil layers in high permeability and high water cut stages in the middle and late stage of oil field exploitation. A new method for evaluating drug elasticity. Background technique [0002] Under the premise of the current shortage of international energy resources, the high permeability and high water cut stage oil layers mainly composed of ASP flooding depth profile control agents are a new direction for future research on enhanced oil recovery technology. Therefore, it is very important to evaluate the elasticity of granular profile control agents in the field of water plugging and profile control in high permeability and high water cut stages. At present, the elastic coefficient K, which characterizes the elasticity...

AI Technical Summary

Problems solved by technology

At present, the elastic coefficient K that characterizes the elasticity of granular profile control agents is only applicable to elastic materials that satisfy Hooke’s law within a certain range, and cannot directly and quantitatively reflect the elastic properties of granular profile control agents

At the same time, there are few systematic studies and evaluations on the elasticity of ASP flooding depth profile control agents, which seriously restricts the water plugging and profile control effect and popularization and application of depth profile control agents.

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