Multiple-oil-layer deep profile control injection device and oil layer deep profile control realizing method thereof

Abstract

The invention relates to a multiple-oil-layer deep profile control injection device and an oil layer deep profile control realizing method thereof. The multiple-oil-layer deep profile control injection device comprises a ground injection system and an injection well, wherein the ground injection system comprises at least two storage tanks; the storage tanks are connected to a stirring tank; a gear shaft is mounted in the stirring tank; stirring gears are mounted on the gear shaft; the stirring tank is connected with a main flow oil pipe through a well mouth device; the main flow oil pipe is positioned at the upper end of the injection well; the middle of the main flow oil pipe is connected to a single-pipe packer; the tail part of the main flow oil pipe form three oil branch pipes; on oil branch pipe is positioned in the center of the main flow oil pipe; a pipe sealing valve is arranged between the main flow oil pipe and the three oil branch pipes; the pipe sealing valve is composed of a left pipe sealing valve and a right pipe sealing valve which are mounted symmetrically; the three oil branch pipes respectively extend into an shallow oil layer, a middle oil layer and a deep oil layer; an eccentric injection allocation device is mounted on each oil branch pipe. By adopting the device and the method provided by the invention, simultaneous profile control of multiple oil layers is realized and the injection effect of a profile control agent is improved.

Description

technical field [0001] The invention relates to oil field development and oil recovery technology, in particular to an injection device for deep profile control of multiple oil layers and a method for realizing deep profile control of oil layers. Background technique [0002] After the oil field is developed by water flooding and after many years of development, most layers will be in the development stage of high water cut or extra high water cut period. In this stage, the water flooding recovery rate is low, the oil well has a high water cut, and the injected water flows along the high-permeability layer, but the low-permeability layer still has development potential because it is rarely affected by the injected water. The low sweep efficiency of injected water greatly limits the improvement of recovery factor. [0003] Aiming at this current mining problem, the existing injection-production technology proposes a deep profile control technology: the profile control agent ...

AI Technical Summary

Problems solved by technology

[0007] An object of the present invention is to provide a multi-reservoir deep profile control injection device, which is used to solve the problem that the downhole profile control devices disclosed in the prior art cannot meet the injection requirements of complex formations. The present invention Another object is a method for realizing deep profile control of oil layers by multi-reservoir deep profile control injection device

Images