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Experimental device for simulating steam injection of SAGD horizontal well and application method of experimental device

An experimental device and horizontal well technology, which is applied in the direction of earthwork drilling, wellbore/well components, production fluid, etc., and can solve problems such as uneven steam injection

Pending Publication Date: 2021-12-21
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide an experimental device for simulating steam injection in SAGD horizontal wells and its application method in view of the above-mentioned defects. Reliable experimental data were obtained for the variation of horizontal well productivity under different steam injection methods, which provided an experimental basis for the follow-up to solve the problem of uneven steam injection along the SAGD horizontal well

Method used

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  • Experimental device for simulating steam injection of SAGD horizontal well and application method of experimental device
  • Experimental device for simulating steam injection of SAGD horizontal well and application method of experimental device
  • Experimental device for simulating steam injection of SAGD horizontal well and application method of experimental device

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Experimental program
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Effect test

Embodiment 1

[0043] The experimental device for simulating steam injection in a SAGD horizontal well includes an experimental steam injection system 1, an experimental fluid injection system 2, a SAGD experimental model 3 connected to the experimental fluid injection system 2, a produced liquid cooling and collection system 4, and data processing The system 5 also includes a horizontal well model 8 connected to the experimental steam injection system 1 and the produced fluid cooling and collection system 4 respectively.

[0044] The experimental steam injection system 1 includes a constant-pressure constant-speed pump 6 and a steam generator 7; the constant-pressure constant-speed pump 6 is connected to the water inlet of the steam generator 7 through a water injection pipeline, and the exhaust end of the steam generator 7 is connected with a steam inlet in parallel. The pipeline, the venting pipeline, and the steam inlet pipeline are connected to the horizontal well model 8, and are used t...

Embodiment 2

[0060] The experimental device for simulating SAGD horizontal well steam injection is applicable to the double-pipe steam injection mode, then the steam injection well 27 and the production well 26 are all parallel double-pipe structures, and the two oil pipes 28 in the steam injection well 27 are short pipes and long pipes. The short pipe is located at the heel of the SAGD experimental model 3, and the length of the horizontal section is 0 cm; the long pipe extends to the toe of the SAGD experimental model 3; the two oil pipes 28 in the production well 26 are both located at the heel of the SAGD experimental model 3 The length of the horizontal section is 0cm; the four oil pipes 28 all have holes at the end; steam is injected from the heel and toe of the SAGD experimental model 3 at the same time in the formal production stage. Other structures are the same as in Embodiment 1.

Embodiment 3

[0062] The experimental device for simulating steam injection in SAGD horizontal wells is suitable for multi-point steam injection. The steam injection well 27 and the production well 26 are all parallel double-pipe structures, and the two oil pipes 28 in the steam injection well 27 are short pipes and long pipes. The short tube is located at the heel of the SAGD experimental model 3, and the length of the horizontal section is 0cm; the long tube extends to the toe of the SAGD experimental model 3; the end of the short tube is open, and the end of the long tube is closed; Steam injection points 29 are distributed, and the apertures of steam injection points 29 gradually increase from the heel to the toe of the SAGD experimental model 3; the two oil pipes 28 in the production well are located at the heel of the SAGD experimental model 3 and have holes at the ends; formally In the production stage, steam is injected along the steam injection points 29 evenly distributed on the lo...

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Abstract

The invention belongs to the technical field of SAGD exploitation of heavy oil reservoirs, and particularly relates to an experimental device for simulating steam injection of an SAGD horizontal well. The experimental device for simulating steam injection of the SAGD horizontal well comprises an experimental steam injection system, an experimental fluid injection system, an SAGD experimental model connected with the experimental fluid injection system, an output liquid cooling and collecting system and a data processing system; the experimental device further comprises a horizontal well model respectively connected with the experimental steam injection system and the output liquid cooling and collecting system. According to the experimental device, the simulation of the SAGD process of different steam injection modes in the on-way direction of the horizontal well can be flexibly completed, the change rule of the productivity of the horizontal well under the different steam injection modes is accurately represented, reliable experimental data are obtained, and an experimental basis is provided for subsequently solving the problem of non-uniform on-way steam injection of the SAGD horizontal well.

Description

technical field [0001] The invention belongs to the technical field of SAGD exploitation of heavy oil reservoirs, and in particular relates to an experimental device for simulating SAGD horizontal well steam injection and an application method thereof. Background technique [0002] With the continuous increase of oil demand and the continuous development and consumption of conventional oil and gas resources, the position of unconventional heavy oil in the energy structure is becoming more and more important. Among the proven oil resources, the proportion of heavy oil is increasing. [0003] Heavy oil is a common organic mixture, its main characteristics are high content of asphaltenes and colloids, few light fractions, high viscosity and very complex composition. Under formation conditions, its viscosity is high and it is not easy to mine. The current conventional oil and gas exploration has entered a bottleneck period, and the development and utilization of heavy oil has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/24E21B49/00
CPCE21B43/2406E21B49/00
Inventor 孙晓飞张磊张艳玉王翔宇李晓宇蔡佳明蔡林峰施昱昊罗兆雯
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)