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Isotopic tracer layered injection device and method for multi-zone oil reservoir

An isotope tracer and injection device technology, which is applied in the field of isotope tracer layered injection devices, can solve the problem of increasing the contradiction between oilfield development layers, the inability to accurately monitor the isotope tracer, and the inability to accurately control the injection volume of the isotope tracer, etc. question

Inactive Publication Date: 2015-09-23
TIANJIN DAGANG OILFIELD SHENGDA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional layered injection technology is to inject isotope tracers into multiple oil layers at the same time, which cannot accurately control the injection amount of isotope tracers in each oil layer, and cannot accurately monitor the isotope tracers in each oil layer, which increases the cost of oil field development. Contradictions between layers affect the determination of various parameters of the reservoir and the evaluation of reservoir development

Method used

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  • Isotopic tracer layered injection device and method for multi-zone oil reservoir
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  • Isotopic tracer layered injection device and method for multi-zone oil reservoir

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] according to figure 1 As shown, the isotope tracer layered injection device of the present invention includes:

[0032] An injection container, a water injection pipeline and a valve, one end of the injection container is connected to the valve 8, the other end is connected to the valve 9, the other end of the valve 8 is connected to the valve 9, the other end of the valve 9 is connected to the water injection pipeline, the water injection The aboveground part of the pipeline is provided with valves in sequence from top to bottom 3 , valve 1, valve 5, valve 4, valve 2 and valve 6, the layered injection device also includes N packers 10, N+1 eccentric water distributors 11 and N+1 quantitative water nozzles 12, so The packer 10 and the eccentric water distributor 11 are located in the underground part of the water injection pipeline, the quantitative water nozzle 12 is arranged in the eccentric water distributor 11, and the eccentric water distributor 11 is connected wi...

Embodiment 2

[0034] according to figure 2 As shown, the method for injecting an isotopic tracer into the oil layer 1 provided by the present invention, the specific steps are as follows:

[0035] a. Pull out the quantitative faucet 12 of the eccentric water distributor 11 communicated with the oil layer 2 and the oil layer 3, replace it with a dead block 13, and close the valve 6;

[0036] b. one end of the valve 9 is connected to the valve 8, and the other end of the valve 9 is connected to the valve 3;

[0037] c. The valve 3 and the valve 5 are closed, the valve 7, the valve 8 and the valve 9 are opened, and pressurized to 35MPa;

[0038] d. Close the valve 7, and inject the isotope tracer tritium water into the layered injection device after the process pressure in the pipe is removed;

[0039] e. The valve 3 and the valve 7 are opened, and the isotope tracer tritium water is injected into the oil layer 1 along with the clear water.

Embodiment 3

[0041] according to figure 2 As shown, the method for injecting an isotopic tracer into the oil layer 1 provided by the present invention, the specific steps are as follows:

[0042] a. Pull out the quantitative faucet 12 of the eccentric water distributor 11 communicated with the oil layer 2 and the oil layer 3, replace it with a dead block 13, and close the valve 6;

[0043] b. one end of the valve 9 is connected to the valve 8, and the other end of the valve 9 is connected to the valve 3;

[0044] c. The valve 3 and the valve 5 are closed, the valve 7, the valve 8 and the valve 9 are opened, and pressurized to 35MPa;

[0045] d. the valve 7 is closed, and after the process pressure in the pipe is removed, the isotope tracer 35 S-Na 2 SO 4 an aqueous solution is injected into the layered injection device;

[0046] e. The valve 3 and the valve 7 are opened, and the isotope tracer 35 S-Na 2 SO 4 The aqueous solution is injected into the oil layer 1 along with the clea...

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Abstract

The invention relates to the field of oil field exploitation, and provides an isotopic tracer layered injection device and method for a multi-zone oil reservoir. The device comprises an injection container, a water injection pipeline, and a valve. The device also comprises N packers and (N+1) eccentric water distributors, wherein the packers are respectively disposed between each two eccentric water distributors. The device also comprises quantitative water nozzles and dead plugs, which are used cooperatively with the eccentric water distributors. The device also comprises the (N+1) quantitative water nozzles. The method comprises the steps: enabling the quantitative water nozzle of one eccentric water distributor to be replaced by one dead plug; enabling the remaining eccentric water distributors to be communicated with an oil layer; slowly injecting isotopic tracer through the control of the opening / closing of the valve; and enabling the isotopic tracer to be injected into a target oil layer. The device and method can achieve the layered injection of different types of isotopic tracers, precisely control the injection amount of isotopic tracer at each oil layer, achieve the accurate monitoring of the isotopic tracer of each oil layer, and has great values for the determining of oil reservoir parameter distribution, reservoir development evaluation, the determining of the design, adjustment and execution of a subsequent development scheme.

Description

technical field [0001] The invention relates to the field of oil field development, in particular to an isotope tracer layered injection device and method for multi-layer oil reservoirs. Background technique [0002] At present, interwell tracer technology in oilfields has gradually become an important reservoir engineering method in the process of oil production, and is widely used in production practice. Oilfield interwell tracer technology reflects the connection of oil and water wells in the process of reservoir development, and grasps parameters such as the direction of water injection, displacement speed, swept area, and reservoir heterogeneity, so as to guide the design of oilfield production and the later stage of oilfield production adjustment. [0003] At present, for multi-layer reservoirs, isotope tracers are mainly injected by layered injection technology. The traditional layered injection technology is to inject isotope tracers into multiple oil layers at the...

Claims

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Application Information

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IPC IPC(8): E21B49/00
Inventor 姜义
Owner TIANJIN DAGANG OILFIELD SHENGDA TECH
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