Tight gas reservoir fracturing fluid filtration damage simulation device and method

A simulation device and fracturing fluid technology, applied in the field of oil and gas exploration and development, can solve the problems of core gas leakage and relatively large simulation result errors, and achieve the effects of reducing simulation errors and improving recovery rate.

Active Publication Date: 2022-03-29
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

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Embodiment 1

[0073] figure 1 It is a schematic structural diagram of a tight gas reservoir fracturing fluid filtration damage 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 ...

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 present invention provides a fracturing fluid loss simulation device and method for tight gas reservoirs. The fracturing fluid filtration damage simulation device for tight gas reservoirs includes: a gas intermediate container, a fracturing fluid intermediate container, a decompression device, and a core fixing device. The rock core fixing device has an airtight accommodating chamber for holding the rock core; one end of the rock core fixing device has an inlet port and a pipe outlet respectively communicated with the accommodating chamber; the outlet of the gas intermediate container communicates with the inlet port; the rock core The other end of the fixing device has a circulation nozzle, the inlet end of the circulation nozzle communicates with the accommodating cavity, and the outlet end communicates with the inner cavity of the gas intermediate container; the outlet of the fracturing fluid intermediate container communicates with the inlet port, so that the fracturing The liquid enters the accommodation cavity from the inlet port to simulate fracturing damage to the core, and the decompression device is connected with the outlet port to balance the pressure in the accommodation cavity, thus effectively avoiding the occurrence of core leaking during the simulation process , which reduces the simulation error to a certain extent.

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 Patents(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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