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Tight gas reservoir fracturing fluid filtration loss damage simulation device and method

A simulation device and fracturing fluid technology, applied in teaching models, educational tools, instruments, etc., can solve problems such as relatively large errors in simulation results and core leaks, and achieve the effects of reducing simulation errors and improving recycling rates

Active Publication Date: 2020-06-26
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the prior art, during the process of moving the core from the formation pressure simulation module to the fracturing fluid simulation fracturing damage module, the core is exposed to the air, causing the core to leak, resulting in a large error in the simulation results

Method used

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  • Tight gas reservoir fracturing fluid filtration loss damage simulation device and method
  • Tight gas reservoir fracturing fluid filtration loss damage simulation device and method
  • Tight gas reservoir fracturing fluid filtration loss damage simulation device and method

Examples

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Embodiment 1

[0073] figure 1 It is a schematic structural diagram of a tight gas reservoir fracturing fluid fluid loss simulation device provided by an embodiment of the present invention. figure 2 It is a schematic structural diagram of the holder in the tight gas reservoir fracturing fluid fluid loss simulation device provided by an embodiment of the present invention. image 3 It is a schematic structural diagram of a core fixing device in a tight gas reservoir fracturing fluid filtration damage simulation device provided by an embodiment of the present invention.

[0074] refer to Figure 1 to Figure 3 As shown, this embodiment provides a fracturing fluid loss simulation device for tight gas reservoirs, including: a gas intermediate container 3 filled with gas, a fracturing fluid intermediate container 4 filled with fracturing fluid, a decompression device 2 and Core fixture 8.

[0075] Wherein, the rock core fixing device 8 has a sealed accommodation chamber for containing the roc...

Embodiment 2

[0098] This embodiment provides a fracturing fluid filtration damage simulation method for tight gas reservoirs. The fracturing fluid filtration damage simulation method for tight gas reservoirs is completed by using the fracturing fluid filtration damage simulation device for tight gas reservoirs provided in the above embodiment. of.

[0099] Figure 4 It is a schematic flowchart of a method for simulating fluid loss damage of fracturing fluid in tight gas reservoirs provided by an embodiment of the present invention. refer to Figure 1 to Figure 4 As shown, the simulation method for fracturing fluid loss damage of tight gas reservoirs in this embodiment specifically includes:

[0100] S101. Put the rock core to be tested into the accommodating cavity of the rock core fixing device.

[0101] Specifically, the diameter of the rock core 9 to be tested is 2.54 cm, and the length range is 3-5 cm. Wherein, the specific length of the rock core 9 to be tested can be set according...

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Abstract

The invention provides a tight gas reservoir fracturing fluid filtration damage simulation device and method. The tight gas reservoir fracturing fluid filtration damage simulation device comprises a gas intermediate container, a fracturing fluid intermediate container, a pressure reducing device and a rock core fixing device, wherein the rock core fixing device is provided with a closed accommodating cavity for accommodating a rock core; one end of the rock core fixing device is provided with a pipe inlet and a pipe outlet which are respectively communicated with the accommodating cavity; theoutlet of the gas intermediate container is communicated with the pipe inlet; the other end of the rock core fixing device is provided with a circulating pipe orifice, the inlet end of the circulatingpipe orifice is communicated with the accommodating cavity, and the outlet end is communicated with the inner cavity of the gas intermediate container; the outlet of the fracturing fluid intermediatecontainer is communicated with the pipe inlet so that fracturing fluid can enter the containing cavity from the pipe inlet to simulate fracturing damage to the rock core, and the pressure reducing device is communicated with the pipe outlet and used for balancing pressure in the containing cavity, so that the situation that the rock core leaks air in the simulation process is effectively avoided,and simulation errors are reduced to a certain degree.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration and development, in particular to a device and method for simulating leakage damage of fracturing fluid in tight gas reservoirs. Background technique [0002] The Tarim Basin in western China is an important natural gas production area in China. The gas reservoirs in this area are characterized by deep burial, high temperature and high pressure, huge thickness, dense matrix, and well-developed fractures. They are typical fractured tight sandstone reservoirs. The natural production of a single well is low, and reservoir stimulation measures are required. [0003] At present, hydraulic fracturing is mainly used to increase the production of a single well, that is, using a surface high-pressure pump to squeeze fracturing fluid with certain properties into the oil layer through the wellbore. A very high pressure is formed on the bottom oil layer. When the pressure exceeds the fracture...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B25/02
CPCG09B25/02
Inventor 杨向同刘会锋冯觉勇张杨苟兴豪刘豇瑜任慧宁
Owner PETROCHINA CO LTD
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