Intelligent high-temperature high-voltage experimental instrument for dynamic leak stopping evaluation

Abstract

The invention relates to an intelligent high-temperature and high-pressure dynamic plugging evaluation instrument, which belongs to the field of petroleum exploration and development experimental equipment. It is composed of core holder, flow meter, electronic balance, ring pressure pump, back pressure controller, liquid circulation pipeline, control line, data collector, computer and printer, etc. It uses the drilling fluid and completion fluid with plugging agent in the mud tank under the conditions of simulated formation temperature, pressure and flow rate, and the mud pump drives the fluid entering the well in the piston type high-temperature and high-pressure mud tank to control the leakage of steel balls, Artificial fractured plates and formation cores are used for artificial plugging damage experiments, so as to realize the correct evaluation of the plugging effect of the plugging materials in the drilling fluid and the completion fluid indoors. Therefore, the drilling fluid and completion fluid system that meet the needs of protecting oil and gas layers are optimized. It solves the problem that the dynamic plugging evaluation cannot be carried out indoors in our country. It is suitable for evaluation experiments of petroleum and exploration and development.

Description

Technical field: [0001] The invention relates to an intelligent high-temperature and high-pressure dynamic plugging evaluation experimental instrument for evaluating the plugging effect of plugging materials in drilling fluid and well completion fluid under indoor simulated formation temperature, pressure and mud flow state in the petroleum industry, which belongs to oil and gas layer protection in petroleum exploration and development field of experimental equipment. Background technique: [0002] During the drilling process, formation leakage often occurs. If the leakage layer is not blocked in time, it will seriously affect the normal operation of the drilling operation. The formation leakage is closely related to the physical properties of the rock, the bottom hole pressure difference, the type and size of the plugging material added to the mud, and other factors. At present, there are only API indoor static plugging evaluation experimental devices at home and abroad. T...

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Problems solved by technology

At present, there are only API indoor static plugging evaluation experimental devices at home and abroad. The steel ball leakage bed is installed at the bottom of the mud tank, and its position is unreasonable. The length of the seam plate is only 6.4mm, and it is still a smooth plane.

Due to the unreasonable position and structure of the leakage bed and the slit plate, the actual situation of the leakage formation cannot be truly simulated, and the steel ball leakage bed test and the slit plate test cannot be carried out at the same time

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