Storage-type precise quantitative oil-gas well down-hole work agent injection system and injection method

A technology of injecting system and working agent, which is applied in wellbore/well components, earthwork drilling, sealing/isolation, etc. It can solve the problems of large amount of glue used, affecting the working efficiency of working fluid, and the decline of adhesive performance, etc., to achieve Excellent injection accuracy and position accuracy, simple and efficient operation method, easy installation and operation

Active Publication Date: 2015-09-30
ANTON BAILIN OILFIELD TECH (BEIJING) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (4) A limited amount of working agent, such as an oxidant, is required;
[0011] (1) It cannot be quantified, and there are over-injection and under-injection; over-injection will cause excessive injection of working agent in the downhole annulus, which will affect the annulus and the production level, and excessive injection of glue will seriously affect the production of oil and gas recovery In the process, if the colloid is injected too much, the colloid will enter the oil layer, affecting the outflow of oil from the formation and reducing the production efficiency; if the injection is insufficient, the operation purpose of the injection cannot be achieved;
[0012] (2) The colloid is transported along the injection pipe for a long distance, which will be polluted by impurities in the operation string, which will adversely affect the performance of the glue; affect the working efficiency of the working fluid, such as a significant d

Method used

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  • Storage-type precise quantitative oil-gas well down-hole work agent injection system and injection method
  • Storage-type precise quantitative oil-gas well down-hole work agent injection system and injection method
  • Storage-type precise quantitative oil-gas well down-hole work agent injection system and injection method

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Experimental program
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Effect test

Embodiment 1

[0079] This embodiment is a storage type precision quantitative oil and gas well downhole working agent injection system, such as image 3 Shown is the working agent injection system of the capsule storage of three groups of injection units, 3-1 is the feeding pipe; 3-2 is the injection pipe; 3-3 is the packer; 3-4 is the discharge port; 3- 5 is a constant pressure valve; 3-6 is a catheter; 3-7 is a working agent storage; 3-8 is a working agent; 3-9 is an injection port; 3-10 is an oil drain; 3-11 is a pressure transmission hole ; 3-12 protective sleeves. The injection system includes an injection pipe and a ground pressurization device, and three groups of injection units are arranged in the injection pipe; each group of injection units includes a variable-volume working agent storage, and the working agent outlet connected to the outside of the injection pipe is arranged on the injection pipe. The discharge port is connected with the working agent storage; the ground pressu...

Embodiment 2

[0083] This embodiment is a storage type precision quantitative oil and gas well downhole working agent injection system, such as Figure 5 The working agent injection system of cylinder liner and piston reservoir of a group of injection units is shown, 5-1 is the drainer; 5-2 is the positioning device; 5-3 is the feeding pipe; 5-4 is the packer ; 5-5 is the discharge port; 5-6 is the constant pressure valve; 5-7 is the cylinder liner; 5-8 is the working agent; 5-9 is the piston; 5-10 is the one-way valve; Screw; 5-12 is an injection pipe; 5-13 is a pressure transmission hole. The injection system includes an injection pipe and a ground pressurization device, and a group of injection units is arranged in the injection pipe; each group of injection units includes a variable-volume working agent storage, and the working agent discharged from the injection pipe communicates with the outside of the injection pipe. The discharge port is connected with the working agent storage; th...

Embodiment 3

[0086] An injection method using a storage-type precision quantitative downhole working agent injection system for oil and gas wells. The injection method is to inject the working agent into a variable-volume working agent storage on the surface in advance, and lower the injection pipe to the target position in the downhole; The pressurizing device generates a pressure in the injection pipe that acts on the variable-volume working agent reservoir and is higher than the pressure outside the injection pipe. The volume of the variable-volume working agent reservoir decreases, and the working agent flows out to the outside of the injection pipe through the outlet. annulus.

[0087] This embodiment 3 uses the working agent injection system of the capsule storage of the three groups of injection units described in embodiment 1 to carry out the injection operation. This embodiment is carried out in the oil recovery horizontal well of the bottom water reservoir, in order to prevent the...

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Abstract

The invention discloses a storage-type precise quantitative oil-gas well down-hole work agent injection system and injection method. The injection system comprises an injection pipe and a ground pressurization device, the injection pipe is internally provided with one or more injection units, each injection unit comprises a volume-variable work agent storer, pressure is conducted on the volume-variable work agent storers by the ground pressurization device in the injection pipe, and the work agent is squeezed out. The invention discloses an injection method for using the storage-type accurate quantitative oil-gas well down-hole work agent injection system at the same time. The work agent is injected into a down-hole target location in a quantitative mode. According to the injection system, by means of the mode that the work agent can be quantitatively injected into the work agent storers in advance, the work agent can be injected accurately and quantitatively, and the injected volume accuracy of the work agent can be guaranteed. By means of the injection method, the work agent can be injected into the target location accurately and quantitatively, the accuracy of injected volume and the injection location is very good, and the best injection effect is guaranteed.

Description

technical field [0001] The invention relates to a storage type precision quantitative oil and gas well downhole working agent injection system and an injection method using the system, belonging to the field of oil and natural gas exploitation. Oil and gas wells here refer to oil and gas wells in a broad sense in the development of oil and gas fields, including oil wells, gas wells, natural gas wells, injection wells, water injection wells, steam injection thermal recovery wells, steam huff and puff wells, steam injection wells, deep wells and ultra-deep wells, horizontal wells, Highly deviated wells, directional wells, vertical wells, etc. Background technique [0002] In the development of oil and gas fields, working agents need to be injected downhole to improve downhole production. The working agents injected downhole include the following categories: [0003] (1) Clogging agents, including glue, cement, and seepage reducers; [0004] (2) Formation sand consolidation ...

Claims

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Application Information

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IPC IPC(8): E21B33/13E21B37/06E21B41/02E21B43/22E21B43/27
CPCE21B33/13E21B37/06E21B41/02
Inventor 裴柏林吴建昌冯国江
Owner ANTON BAILIN OILFIELD TECH (BEIJING) CO LTD
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