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Device and method for nested layered injection of isotopic tracer

An isotope tracer and injection device technology, which is applied in the field of isotope tracer nested layered injection device, can solve the problem of increasing the contradiction between layers in oil fields, the inability to accurately control the injection amount of isotope tracer, and the inability of isotope tracer Accurate monitoring and other issues to achieve the effect of accurate monitoring

Inactive Publication Date: 2015-11-25
TIANJIN DAGANG OILFIELD SHENGDA TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the most widely used tracer technology is to use isotope tracers to inject oil layers for interwell tracing. For multi-layer oil reservoirs, the traditional injection technology is to inject isotope tracers into multiple oil layers at the same time, which cannot accurately control each oil layer. The injection amount of isotope tracers in oil layers cannot accurately monitor the isotope tracers in each oil layer, which increases the conflict between layers in oilfield development and affects the determination of various parameters of the reservoir and the evaluation of reservoir development

Method used

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  • Device and method for nested layered injection of isotopic tracer
  • Device and method for nested layered injection of isotopic tracer
  • Device and method for nested layered injection of isotopic tracer

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Experimental program
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Effect test

Embodiment 1

[0033] according to figure 1 As shown, the nested layered injection device of the present invention includes an injection container, one end of the injection container is connected to a water injection pipeline through a valve 8 and a four-point high pressure valve 7 in turn, and the other end of the injection container is connected to the valve 9, the layered injection device is provided with valve 12, valve 11, valve 10, valve 3, valve 1, valve 5, valve 4, valve 2, and valve 6 from top to bottom, and the layered injection device is also It includes a casing 13, an oil pipe 14 is sleeved inside the casing 13, a center pipe 15 is sleeved inside the oil pipe 14, and the casing 13, the oil pipe 14 and the center pipe 15 communicate with the water injection pipeline respectively, and the The casing 13 communicates with the upper oil layer, the oil pipe 14 communicates with the middle oil layer, and the central pipe 15 communicates with the lower oil layer, and the underground par...

Embodiment 2

[0035] according to figure 2 As shown, tritium water is injected into the upper oil layer, and the specific steps are as follows:

[0036] a. Connect valve 9 to valve 2;

[0037] b. Close valve 2 and valve 6, open valve 7, valve 8, and valve 9, pressurize to 35Mpa, and test the pressure without leakage;

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

[0039] d. Open valve 2 and valve 7, and clear water will be brought into the upper oil layer corresponding to the casing through valve 7, valve 8, valve 9 and valve 2.

Embodiment 3

[0041] according to image 3 As shown, injecting into the upper oil layer 35 S-sodium sulfate aqueous solution, concrete steps are as follows:

[0042] a. Connect valve 9 to valve 1;

[0043] b. Close valve 2 and valve 5, open valve 7, valve 8, and valve 9, pressurize to 35Mpa, and test the pressure without leakage;

[0044] c. Close the valve 7, and after the process pressure in the pipe is removed, turn the 35 Slowly inject the S-sodium sulfate aqueous solution into the layered injection device;

[0045] d. Open valve 1, valve 7, clean water through valve 7, valve 8, valve 9, valve 1 35 The S-sodium sulfate aqueous solution is brought into the middle oil layer corresponding to the tubing.

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Abstract

The invention relates to the field of oilfield development, and provides a device and a method for nested layered injection of isotopic tracers. The device comprises an injection container, a water injection pipeline, and valves, and also comprises a sleeve, an oil pipe, a central pipe, and a packer. In the method, through controlling the switches of the valves, the isotopic tracer is injected into corresponding oil layers respectively through the sleeve, the oil pipe, and the central pipe, so as to realize layered injection of the isotopic tracer. The nested layered injection device and the layered injection method realize layered injection of different kinds of isotopic tracers, and injection volume of the isotopic tracer of each oil layer is accurately controlled, accurate monitoring of the isotopic tracer of each oil layer is realized. The device and the method have significant value for determining oil reservoir parameter distribution, reservoir exploitation evaluation, follow-up development scheme design determination, adjustment, and implementation.

Description

technical field [0001] The invention relates to the field of oil field development, in particular to a device and method for nested layered injection of isotope tracers. Background technique [0002] Oilfield cross-well tracing technology is an important reservoir engineering method in the process of oil recovery, 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, the most widely used tracer technology is to use isotope tracers to inject oil layers for interwell tracing. For multi-layer oil reservoirs, the traditional injection technology is to inject isotope tracers into multiple oil layers at the same time, whic...

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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