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Device for simulating sedimentation rule of proppant in complicated fracture network formed by volume fracturing and application of device

A volumetric fracturing and proppant technology, applied in measuring devices, instruments, scientific instruments, etc., can solve the problems of less proppant migration laws and lack of experimental devices

Active Publication Date: 2014-12-24
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The filling and placement of proppant in the complex fracture network formed by fracturing is the key factor affecting the success of the fracturing operation. During the fracturing operation, whether the proppant can form an effective The support of the proppant has a very important impact on the conductivity of the entire complex fracture network and the stimulation effect of fracturing. At present, there are few studies on the migration law of proppant in complex fractures in China, and there is a lack of necessary experimental devices.

Method used

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  • Device for simulating sedimentation rule of proppant in complicated fracture network formed by volume fracturing and application of device
  • Device for simulating sedimentation rule of proppant in complicated fracture network formed by volume fracturing and application of device
  • Device for simulating sedimentation rule of proppant in complicated fracture network formed by volume fracturing and application of device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] like figure 1 , figure 2 shown.

[0041] A device for simulating the settlement law of volume fracturing complex fracture network proppant, including a main fracture 1 composed of enclosures, a secondary fracture 2 vertically connected to the main fracture 1, and a secondary fracture 2 parallel to the main fracture 1 and connected through the secondary fracture 2 Tertiary crack 3.

[0042] The whole device is made of plexiglass, and the compressive pressure of the plexiglass is less than or equal to a standard atmospheric pressure.

[0043] The two ends of the main fracture 1 of the device are respectively provided with a fracturing fluid inlet 4 and a fracturing fluid outlet 5, and the fracturing fluid inlet is connected with an external fracturing fluid pipeline or sand mixing fluid pipeline; The fracturing fluid inlet and fracturing fluid outlet are respectively provided with pressure gauges and valves.

[0044] Both the fracturing fluid inlet 4 and the fractur...

Embodiment 2

[0051] A working method of the device described in Example 1 in simulating volume fracturing complex fracture network proppant settlement law:

[0052] (1) Configure the sand-carrying liquid according to the requirements of the experimental plan;

[0053] (2) Prepare the proppant required by the experimental plan;

[0054] (2) Check the cleanliness in the device; ensure that there are no impurities affecting the experimental results in the cracks in the device;

[0055] (4) According to the requirements of the experimental plan, use the plugging part to block part of the cracks in the device, so that it forms the simulated fracture network structure required by the experimental plan, and seals the top of the device; the simulation described in this embodiment Seam structure includes Figure 3-Figure 8 The structural diagram shown in Fig. 1 shows the migration experiment of the above-mentioned fracture network respectively;

[0056] (5) First inject the device with clear wat...

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Abstract

The invention relates to a device for simulating a sedimentation rule of a proppant in a complicated fracture network formed by volume fracturing. The device comprises a main fracture composed of a fence, second-grade fractures vertical to the main fracture and third-grade fractures which are parallel to the main fracture and are connected by the second-grade fractures. The whole structure of the device can sufficiently simulate fracture networks with different types of underground reservoir stratum so that the versatility of the device is added. The visualization of the device is good for tracking and observing an experiment phenomenon and recording data; and the experiment efficiency is extremely improved and the device is convenient to repair and maintain. A research result obtained by using the device has a certain reference value for volume fracturing theoretical researches and field application.

Description

technical field [0001] The invention relates to a device for simulating the settling law of proppant in complex fracture network of volume fracturing and its application, which belongs to the technical field of oil and gas field development. Background technique [0002] With the further development of society, the world's demand for oil is increasing day by day. When the development of large-scale integrated oilfields and high-permeability blocks enters the late stage of high water cut, it is very necessary to develop low-permeability and ultra-low-permeability oil and gas reservoirs. As a stimulation technology, hydraulic fracturing can play a very important role. Hydraulic fracturing can form fractures with ultra-high conductivity in the formation, thereby increasing the production of oil wells. As a new technology of hydraulic fracturing, volume fracturing is suitable for developing unconventional reservoirs such as shale and tight sandstone. Volume fracturing in thes...

Claims

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Application Information

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IPC IPC(8): G01N33/00
Inventor 温庆志李杨段晓飞战永平刘华高金剑刘欣佳
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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