Condensate gas reservoir blockage relieving physical simulation experimental device and condensate gas reservoir blockage relieving physical simulation experimental method

Abstract

The invention relates to a condensate gas reservoir blockage relieving physical simulation experimental device and a condensate gas reservoir blockage relieving physical simulation experimental method, and belongs to the technical field of oil field development experiment. The experimental device consists of a condensate gas reservoir model, an injection system, a production system and a data analysis system. The experimental device is used for performing preparation for simulating a rock core of a gas layer main model and simulating a rock core of a near wellbore zone model; the prepared rock cores are subjected to vacuum pumping and saturated gas condensation; a condensate gas reservoir blockage relieving experimental model is built; condensate gas reservoir seepage flow passage blockage simulation experiments and blockage relieving simulation experiments are performed; a condensate gas reservoir blockage relieving scheme is made according to obtained experimental data; the stratum temperature, the pressure and the depletion development process of the condensate gas reservoir can be simulated in a laboratory; the dynamic simulation of the depressurizing production and the gas injection swallowing-spitting blockage relieving of the condensate gas reservoir is realized; the blockage relieving gas injection quantity and the injection period of the simulated condensate gas reservoir are determined; the operation is simple and convenient; the implementation is easy; and the investment of a large amount of labor, materials and money on site is not needed.

Description

technical field [0001] The invention relates to a physical simulation experiment device and an experiment method for plugging removal of condensate gas reservoirs, belonging to the technical field of oilfield development experiments. Background technique [0002] During the development of condensate gas reservoirs, when the pressure drops below the dew point, natural gas will turn into liquid and be precipitated in the form of condensate oil, which is the phenomenon of reverse condensation. The accumulation of reverse condensate in the area near the well will block the seepage channel of the formation, reduce the productivity of the gas well, and have an important impact on the development of the gas reservoir. Therefore, the key to the development of the condensate gas reservoir is to remove the plugging of the condensate gas reservoir question. The patent with the application number 200410081127.7 discloses a method of huffing and puffing gas injection in condensate gas w...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a condensate gas reservoir plugging removal method for the defects of the above-mentioned prior art, such as large on-site workload, influence on the normal production time of gas wells, high cost of injecting natural gas, uncontrollable plugging removal effect, and difficulty in meeting actual production needs. Physical simulation experiment device

Images