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Hydrofracture experiment method, reservoir experiment sample, pouring equipment and preparation method

A technology of hydraulic fracturing and experimental method, applied in the fields of earthwork drilling, production of fluids, instruments, etc., can solve the problems of difficult mechanism understanding, poor reservoir simulation effect, and difficulty in realizing volume transformation.

Pending Publication Date: 2022-01-11
PETROCHINA CO LTD
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AI Technical Summary

Problems solved by technology

[0002] In the implementation of unconventional reservoir stimulation technology such as shale oil and gas, due to the complex geological conditions of the reservoir, especially the existence of natural fractures and horizontal bedding, the propagation law and shape of hydraulic fractures are relatively complicated, which makes the mechanism understanding difficult.
In the hydraulic fracturing simulation experiment that simulates the shape of natural fractures, it usually focuses on the simulation of vertical or inclined natural fractures, focusing on how to simulate the filling or cementation state of natural fractures. These simulation experiments are not effective in simulating real reservoirs.
At present, the understanding of the influencing factors of hydraulic fracture propagation is still not thorough, and the process optimization design is not pertinent, which leads to the obvious limitation of bedding on the vertical extension scale of fractures in the field investigation and reconstruction construction, and it is difficult to achieve sufficient volume stimulation. The design of the transformation process is more difficult

Method used

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  • Hydrofracture experiment method, reservoir experiment sample, pouring equipment and preparation method
  • Hydrofracture experiment method, reservoir experiment sample, pouring equipment and preparation method
  • Hydrofracture experiment method, reservoir experiment sample, pouring equipment and preparation method

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Embodiment 1

[0057] The present invention provides a hydraulic fracturing experimental method. The reservoir experimental samples used in the hydraulic fracturing experimental method include: a cement body 81, a fracturing wellbore 83 and at least one mesh structure layer 82; figure 1 As shown, the fracturing wellbore 83 is set in the cement body 81 , and the mesh structure layer 82 is spread and set in the cement body 81 .

[0058]In this hydraulic fracturing experimental method, the reservoir experimental sample used has a mesh structure layer 82, and the mesh structure layer 82 is spread and arranged in the cement body 81. Through the mesh structure layer 82, the real reservoir horizontal layer can be realized The simulation of physical cementation performance enables this hydraulic fracturing experimental method to more clearly display the vertical propagation form of hydraulic fractures under horizontal bedding conditions, which is helpful for researchers to deepen the research on frac...

Embodiment 2

[0064] The invention provides a reservoir experiment sample, such as figure 1 As shown, the reservoir experimental sample includes: a cement body 81, a fractured wellbore 83 and at least one mesh structure layer 82; the fractured wellbore 83 is set in the cement body 81;

[0065] Use this reservoir experimental sample to carry out hydraulic fracturing experiments. This reservoir experimental sample has a mesh structure layer 82. The mesh structure layer 82 is spread and arranged in the cement body 81. Through the mesh structure layer 82, real reservoir The simulation of the cementation performance of the horizontal bedding enables the hydraulic fracturing experiments to more clearly show the vertical expansion of hydraulic fractures under the condition of horizontal bedding, which helps researchers to deepen the mechanism of fracture height extension under the condition of horizontal bedding Research, more accurately understand the law of fracture height extension, and guide t...

Embodiment 3

[0072] The invention provides a pouring equipment for reservoir experiment samples, such as Figure 2 ~ Figure 4 As shown, this pouring equipment comprises: pouring mold 10, laying leak box 20 and lifting mechanism 50; Casting mold 10 is used for forming the cement body 81 of reservoir experiment sample; Casing 21, the bottom surface 211 of casing is provided with a plurality of pouring through-holes 22, and the cement in the casing 21 can fall into pouring mold 10 through pouring through-holes 22; Laying leak box 20 moves up and down.

[0073] The above-mentioned reservoir experimental samples can be prepared by pouring layer by layer. The first layer is poured first, and the liquid cement is input into the pouring mold 10 to set the position of the bedding plane; the mesh structure layer 82 is spread and set on the The surface of the liquid cement in the mold 10 is poured; then the second layer is poured. When pouring the second layer, the liquid cement in the first layer ...

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Abstract

The invention provides a hydrofracture experiment method, a reservoir experiment sample, pouring equipment and a preparation method. The reservoir experiment sample adopted in the hydrofracture experiment method comprises a cement body, a fracturing shaft and at least one mesh structure layer; the fracturing shaft is arranged on the cement body; and the mesh structure layer is arranged in the cement body in a spreading manner. According to the invention, the simulation effect on hydrofracture crack propagation is improved.

Description

technical field [0001] The invention relates to the technical field of physical simulation experiments for oil and gas field development, in particular to a hydraulic fracturing experiment method, reservoir experiment samples, pouring equipment and a preparation method. Background technique [0002] In the implementation of unconventional reservoir stimulation technology such as shale oil and gas, due to the complex geological conditions of the reservoir, especially the existence of natural fractures and horizontal bedding, the propagation law and shape of hydraulic fractures are relatively complicated, which makes the mechanism understanding difficult. . In the hydraulic fracturing simulation experiment that simulates the shape of natural fractures, it usually focuses on the simulation of vertical or inclined natural fractures, focusing on how to simulate the filling or cementation state of natural fractures. These simulation experiments have poor simulation effects on real...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26E21B49/00G09B25/02
CPCE21B43/26E21B49/00G09B25/02
Inventor 付海峰胥云才博梁天成刘云志严玉忠修乃岭蒙传幼王欣翁定为
Owner PETROCHINA CO LTD
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