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Visualization device and test method for simulating dynamic closure of discontinuous sand-laying joints

A non-continuous, sand-laying technology, which is applied in the direction of soil material testing and material inspection, can solve the problems that the change of porosity rate cannot be considered, the filtration loss of fracturing fluid cannot be simulated, and the condition of proppant sand column cannot be directly observed. Achieve the effect of simple structure, effective test method and reliable principle

Active Publication Date: 2018-09-04
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. It cannot simulate the dynamic closure of fractures after fracturing
[0005] 2. Cannot simulate fluid loss of fracturing fluid during dynamic closure of fractures
[0006] 3. Cannot consider the change of porosity rate in discontinuous sand-sprayed fractures under the condition of fracturing fluid leakage during dynamic closure of fractures
[0007] 4. It is not possible to directly observe the proppant sand column in the fracture during the dynamic closure process

Method used

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  • Visualization device and test method for simulating dynamic closure of discontinuous sand-laying joints
  • Visualization device and test method for simulating dynamic closure of discontinuous sand-laying joints
  • Visualization device and test method for simulating dynamic closure of discontinuous sand-laying joints

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A visualization device for simulating the dynamic closure of discontinuous sand-spreading seams, including a driving mechanism, a visual mechanism, a casing 9, a movable piston plate 10 and an artificial rock slab 21, the casing 9 is a hollow structure, the upper end is closed and the lower end is open , the artificial rock plate 21 is arranged on the movable piston plate 10, and the movable piston plate 10 is arranged in the housing 9, and the upper surface of the movable piston plate 10 is provided with a filter loss groove 22 and a filter loss hole 13, and the movable piston plate 10 is in sliding and sealing cooperation with the inner cavity of the housing 9 , the driving mechanism is connected with the movable piston plate 10 to drive the movable piston plate 10 to move in the inner cavity of the housing 9 , and the visible mechanism is arranged on the upper surface of the housing 9 .

[0036] The drive mechanism includes a hydraulic pump 1, a tee 3, a piston rod 12...

Embodiment 2

[0054] A method for testing a visualization device for simulating the dynamic closure of discontinuous sand-laying joints, comprising the following steps:

[0055] 1. Place the artificial rock plate 21 on the movable piston plate 10, prepare 2.432L of fiber fracturing fluid, and lay it on the artificial rock plate 21;

[0056] 2. Weigh 120g of proppant and prepare sand concentration of 360kg / m 3 The fiber carrying sand fluid, and the proppant sand column is non-uniformly laid on the upper surface of the artificial rock slab 21;

[0057] 3. Set the first sealing gasket 19 in the sealing groove on the upper surface of the housing 9, and place the visible glass 8 and the upper pressure plate 7 of the window in sequence;

[0058] 4. Fasten the window upper platen 7 and the visible glass 8 through the nut 5 and the screw rod 4; adjust the rotating locking shaft 15 so that the casing 9 and its connected window upper platen 7 and lower platen 11 are in the vertical direction;

[00...

Embodiment 3

[0068] This embodiment describes the device in the present invention with reference to the accompanying drawings.

[0069] Such as figure 1 As shown in -3, a visualization device for simulating the dynamic closure of discontinuous sand-laying seams is mainly composed of a hydraulic pump 1, an upper pressing plate 7 of a window, a lower pressing plate 11, a movable piston plate 10, a housing 9, an artificial rock plate 21, a hydraulic pressure Cylinder 14, piston rod 12, sight glass 8, support base 16, rotation locking shaft 15, first pressure gauge 2, second pressure gauge 6, waste liquid tank 18 are formed. The upper pressing plate 7 of the window and the visible glass 8 are fastened and bonded by the screw rod 4 and the nut 5; the visible glass 8 and the upper surface of the housing 9 are bonded and sealed by the first sealing gasket 19; the movable piston The plate 10 and the inner cavity of the housing 9 are bonded and sealed by the second sealing gasket 20; the housing 9...

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Abstract

The invention discloses a visualization apparatus for simulating non-continuous sanding seam dynamic closing and a test method thereof. The apparatus comprises a driving mechanism, a visual mechanism, a housing, a movable piston plate and an artificial rock plate. The housing is in a hollow structure, an upper end is enclosed, and a lower end is opened, the artificial rock plate is arranged on the movable piston plate, the movable piston plate is arranged in the housing, a leak-off groove and a leak-off aperture are arranged on the upper surface of the movable piston plate, the movable piston plate and an inner cavity of the housing are cooperated in a sliding sealed mode, the driving mechanism is connected with the movable piston plate to drive the movable piston plate to move in the inner cavity of the housing, and the visual mechanism is arranged on the upper surface of the housing. The visualization apparatus can simulate the real condition of non-continuous sanding seam pore rate change, can satisfy test requirement of pore rate change in the seams under different environment conditions, and can be used for guiding and optimizing the pulse-type sand fracturing technological parameters to reduce the adverse effect due to decreased non-continuous support pore rate in the seams.

Description

technical field [0001] The invention relates to a visual test device and a test method for simulating the fluid loss of fracturing fluid and the settlement of proppant sand columns during the dynamic closing process of discontinuous sand-spreading fractures after simulating pulse-type sand-adding fracturing. Background technique [0002] As one of the emerging technologies for reservoir stimulation and stimulation, pulsed sand fracturing has been popularized and applied on a large scale around the world. By forming discontinuous supports in hydraulic artificial fractures, the porosity in the fractures and the flow efficiency of oil and gas after fracturing are greatly improved, so as to achieve high-efficiency production of oil and gas wells after fracturing. However, after the fracturing pump is shut down, the discontinuous proppant sand column formed in the fracture during the pump injection stage will gradually settle in the direction of the fracture height due to the gra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 陈星宇尹丛彬朱炬辉王素兵何封肖剑锋
Owner BC P INC CHINA NAT PETROLEUM CORP
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