A method of an interior experimental device and using this device for section

Abstract

The invention provides an indoor experiment device and a method for profile control using the device, which solves the problem that the existing indoor experiment cannot judge the position and size of the hyperpermeable strip formed in the process of polymer flooding. Specifically, an integrated injection-production instrument for pressure measurement is invented, which is arranged on a two-dimensional planar well pattern heterogeneous core model; the one-dimensional core is used to find out the relationship between the pore volume and the pressure gradient of the high-permeability zone, and through pressure measurement The injection-production integrated instrument measures the pressure values ​​of each pressure measuring point, and calculates the pressure gradient between each point; finds the relationship between the pressure gradient and the pore volume of the hyperpermeable zone, and determines the pore volume of the hyperpermeable zone according to the above relationship, and then The profile control agent with the same volume as the pore volume is injected into the hyperpermeable zone by using the piezometric injection-production integrated instrument to complete the profile control. The inventive device can accurately locate the position of the hypertonic zone and implement profile control for the hypertonic zone, so that the indoor profile control process is closer to the actual situation on site, and provides device and technical support for the indoor research of profile control technology.

Description

technical field [0001] The invention relates to a device and method for profile control in the field of oil and gas field development, in particular to a device and method for precise profile control of high-permeability strips during indoor experiments of polymer flooding. Background technique [0002] At present, polymer flooding has been applied on a large scale in various oil fields, and a good oil displacement effect has been achieved in the early stage. However, with the increase of production time, the effect of polymer flooding began to gradually deteriorate, and some areas even produced ineffective circulation, that is, the injection of a large amount of polymers has very little or no recovery of the remaining oil. The fundamental reason is that after many years of polymer flooding development, high-permeability strips have generally developed, leading to more prominent contradictions between layers and layers, causing the displacement fluid to rush into the high-pe...

AI Technical Summary

Problems solved by technology

[0004] In terms of laboratory experiments, due to the limitation of models and methods, the existing technical means of laboratory experiments are still unable to judge the basic parameters such as the position and size of the hyperpermeable strips formed in the process of polymer flooding. Precise profile control of high-permeability strips can only use general profile control technology, which makes the indoor experiment poorly simulated to the actual mine field, and the experimental results obtained are also quite different, so it is impossible to give accurate guidance and help on site

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