Device for simulating polymer dissolution degree and injection experiments

Abstract

The invention discloses a device for simulating polymer dissolution degree and injection experiments. The device comprises a cavity with a square outside and a circular inside, a pressure sensing system, a PC and a shearing device, wherein the cavity is provided with a liquid inlet channel, a spherical cavity and a liquid discharge channel which are sequentially communicated, the shearing device is mounted in the spherical cavity, filter screen cake is arranged in the liquid discharge channel, the pressure sensing system is provided with a pressure collecting connector, the pressure sensing system is mounted on the upper end face of the cavity, and the pressure sensing system, the PC and the shearing device are sequentially connected. The device has the advantages that the situation that when a polymer crosslinking body exists and is blocked and retained in the cavity by the filter screen, pressure rises, flowing is stopped, corresponding data collected by the pressure sensor is transmitted to the shearing device for shearing, the solution structure is destroyed greatly by the high-speed shearing, polymer solution viscosity is lowered, the solution passes the filter screen in a small volume manner, and the polymer solution entering a core does not block the core is simulated.

Description

technical field [0001] The invention relates to an experimental device for simulating the dissolution degree and injectability of a polymer, which belongs to the technical field of petroleum industry equipment. Background technique [0002] Suizhong 36-1 Oilfield's recovery after early polymer injection increased by 7% compared with conventional water flooding, which marks a major success in the application of polymer flooding early polymer injection technology in offshore oilfields. However, in the entire supporting technical process, many polymer injection wells have high injection pressure, and within a certain period of time, acid fracturing and plugging removal construction measures will be used to ensure the injection of polymer solution. Sampling analysis was taken on site; the results showed that some polymers were still mixed unevenly during the polymer preparation process, and more than 50% of the scale content in the formation was polymer cross-linking, and the pr...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an experimental device for simulating the degree of polymer solubility and injectability, so as to solve the problem of poor on-site injection effect of polymer flooding in offshore oilfields

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