Hydraulic pulse-assisted reservoir chemical remedial treatment experiment device and method

Abstract

The invention discloses a hydraulic pulse-assisted reservoir chemical remedial treatment experiment device and a hydraulic pulse-assisted reservoir chemical remedial treatment experiment method. The experiment device comprises a core holder, an annular pressure supply device, a chemical reagent storage tank, a water storage tank, an oil storage tank and a liquid container, wherein the chemical reagent storage tank, the water storage tank and the oil storage tank are connected with a liquid inlet of the core holder through delivery pipes; the liquid container is connected with a liquid outlet of the core holder; and a hydraulic pulse generating device is arranged on each delivery pipe. The experiment method comprises the following steps of: 1, preprocessing a tested core; 2, measuring the initial permeability of the core by water drive; 3, polluting the core; 4, measuring the permeability of the core by water drive after pollution; 5, performing a hydraulic pulse-assisting chemical reagent remedial treatment experiment; 6, measuring the permeability of the core by water drive after remedial treatment; 7, performing the hydraulic pulse-assisted chemical reagent remedial treatment experiment under the conditions of different frequencies and different amplitudes; and 8, arranging data. The device is rational in design, convenient to arrange, complete in function, simple to operateand good in using effect and can realize pulse fluctuation of the chemical remedial treatment under the action of an injection pressure.

Description

technical field [0001] The invention belongs to the technical field of chemical plugging removal simulation experiments in oil production chambers, and in particular relates to a hydraulic pulse assisted reservoir chemical plugging removal experimental device and an experimental method. Background technique [0002] Due to the need to use a large amount of chemical agents in oilfield exploitation, the stratum is blocked and polluted, and the situation of stratum pollution has developed to deep layers and long distances, so there is an urgent need for an effective chemical plugging method to solve oilfield exploitation. At the same time, the corresponding chemical plugging removal experimental devices and experimental methods are becoming more and more important. However, the current conventional acidification and chemical plugging removal methods have poor plugging removal effects, and their action time is short and the distance into the formation is small, which cannot effe...

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Problems solved by technology

However, the current conventional acidification and chemical plugging removal methods have poor plugging removal effects, and their action time is short and the distance into the formation is small, which cannot effectively solve the plugging problem of formation plugging pollution. Therefore, the existing acidification and chemical plugging removal methods The means can no longer meet the actual needs of the site

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