Experimental device for simulating hydrofracture action mechanism in steam assisted gravity drainage (SAGD) process

A technology of action mechanism and experimental device, which is applied in the direction of mining fluid, wellbore/well components, earthwork drilling and production, etc., to achieve the effect of strong pertinence and simple operation

Pending Publication Date: 2015-12-02
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
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  • Application Information

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Problems solved by technology

Even if the influence of temperature is considered, the experiment is usually carried out by heating the experimental rock sample as a whole, which is quite different from the local heating effect of the gas injection well on the formation during the SAGD process

Method used

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  • Experimental device for simulating hydrofracture action mechanism in steam assisted gravity drainage (SAGD) process
  • Experimental device for simulating hydrofracture action mechanism in steam assisted gravity drainage (SAGD) process
  • Experimental device for simulating hydrofracture action mechanism in steam assisted gravity drainage (SAGD) process

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Experimental program
Comparison scheme
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Embodiment 1

[0024] Embodiment 1: as figure 1 The present invention discloses an experimental device for simulating the action mechanism of hydraulic fracturing in the SAGD process, including a true triaxial stress loading device, a steam heating device, a fracturing device and an acoustic emission monitoring device.

[0025] combine figure 1 As shown, the present invention relates to the experimental rock sample 15 which is a 300mm×300mm×600mm experimental rock sample 15 formed by pouring cement mortar. When pouring the cement mortar test rock sample, the wellbore 11 and the hot steam circulation pipeline 14 need to be placed in the iron mold in advance and poured together. When pouring, the outlet of the wellbore 11 is placed at the center of the experimental rock sample, and the position of the hot steam circulation pipeline 14 can be flexibly placed according to the requirements and purposes of the experiment. Lead out from the right side of the sample.

[0026] combine figure 1 As...

Embodiment 2

[0041] Embodiment 2: An experimental device for simulating the mechanism of hydraulic fracturing in the SAGD process. The difference from Embodiment 1 is that the heating rate of the steam heat source 4 is 40° C. / h.

Embodiment 3

[0042] Embodiment 3: An experimental device for simulating the mechanism of hydraulic fracturing in the SAGD process. The difference from Embodiment 1 is that the heating rate of the steam heat source 4 is 60° C. / h.

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Abstract

The invention discloses an experimental device for simulating a hydrofracture action mechanism in the steam assisted gravity drainage (SAGD) process. The experimental device comprises a true triaxial stress loading device, a steam heating device, a fracture device and an acoustic emission monitoring device. The true triaxial stress loading device can apply stress in three directions to an experimental rock sample through a pressure chamber. The steam heating device locally heats the experimental rock sample through a hot steam circulation pipeline prefabricated in the experimental rock sample and monitors the temperature of the experimental rock sample through a temperature sensor arranged on the surface of the experimental rock sample. The fracture device injects fracturing fluid into the experimental rock sample through a shaft prefabricated in the experimental rock sample. The acoustic emission monitoring device monitors acoustic emission signals generated inside the experimental rock sample and determines the crack spatial position through a corresponding positioning algorithm. By the adoption of the experimental device, the SAGD hydrofracture process under a high-temperature and high-pressure condition is simulated, and thus true and effective evaluation and reference are provided for hydrofracture construction design of a thickened-oil oilfield.

Description

technical field [0001] The invention belongs to the research field of hydraulic fracturing of rock mechanics, and in particular relates to an experimental device for simulating the action mechanism of hydraulic fracturing in the SAGD process. Background technique [0002] China and the world are rich in heavy oil reservoir resources. SAGD technology is an important way to develop heavy oil resources. However, as many oil fields enter the middle and late stages of development, there are continuous developments of high water cut, low permeability, and ultra-heavy oil. Due to the severe oil production decline in oilfields, the traditional heavy oil thermal recovery technology urgently needs to be innovated and upgraded. On the other hand, hydraulic fracturing is one of the main ways to increase production and injection in the development of low-permeability oil and gas reservoirs, and it has a significant effect on improving oilfield recovery. Therefore, the combination of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26E21B43/24E21B49/00
Inventor 张广清赵波
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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