Ultrasonic-assisted reservoir stratum chemical blockage removal experimental facility and experimental method

Abstract

The invention discloses an ultrasonic-assisted reservoir stratum chemical blockage removal experimental facility and an experimental method. The experimental facility comprises a rock core clamp holder, a ring compression feed device, an ultrasonic energy converter, an ultrasonic generator, a chemical reagent storage tank connected with a liquid inlet of the rock core clamp holder by a conveying pipeline, a water storage tank, an oil storage tank and a liquid container connected with a liquid outlet of the rock core clamp holder. The experimental method comprises the following steps of: 1, pretreating a tested rock core; 2, testing the initial permeability of the rock core through water drive; 3, polluting the rock core; 4, testing the permeability of the polluted rock core through the water drive; 5, performing an ultrasonic-assisted chemical reagent blockage removal experiment; 6, testing the permeability of the rock core subjected to the blockage removal through the water drive; 7,performing the ultrasonic-assisted chemical blockage removal experiment under the condition of ultrasonic oscillation with different frequencies and amplitudes; and 8, processing data. The ultrasonic-assisted reservoir stratum chemical blockage removal experimental facility has reasonable design, complete functions and high using effect, is easy and convenient to arrange and operate, and can realize the pulse fluctuation of the chemical blockage removal under the action of the ultrasonic oscillation.

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 an ultrasonic-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 effectiv...

AI Technical Summary

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

Images