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Experimental device and method for evaluating micro jet-flow permeation-increasing mechanism of fluctuation oil production of fractured reservoir

A technology of experimental device and experimental method, which is applied in the direction of vibration generating device, mining fluid, earthwork drilling, etc., can solve the problems of lack of reinforcement mechanism research, inability to observe the jet flow inside the core, etc., and achieve reliable working performance and visual simulation effect , the effect of simple structure

Active Publication Date: 2018-07-10
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] However, the current research equipment and methods for the mechanism of wave recovery technology are mainly limited to conventional core displacement equipment and methods, and the experimental research equipment for visually revealing the micro-jet permeability enhancement mechanism of wave oil production and evaluating its influencing factors cannot be observed. There are no methods and methods, especially in fractured reservoirs, the research on the micro-jet permeability enhancement mechanism of fluctuating oil production and the enhancement mechanism of fluctuating and compound acidizing stimulation effects in fractured reservoirs is even more lacking. Establish a visual, high-precision, high-stability indoor The simulated experimental device and its effective experimental method can further deepen the understanding of the dynamic and microcosmic effects of wave oil recovery technology, and promote the field popularization and application of wave oil recovery technology and wave compound chemical oil recovery technology

Method used

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  • Experimental device and method for evaluating micro jet-flow permeation-increasing mechanism of fluctuation oil production of fractured reservoir
  • Experimental device and method for evaluating micro jet-flow permeation-increasing mechanism of fluctuation oil production of fractured reservoir
  • Experimental device and method for evaluating micro jet-flow permeation-increasing mechanism of fluctuation oil production of fractured reservoir

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Experimental program
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Embodiment 1

[0050] Such as figure 1 and figure 2 As shown, this embodiment provides an experimental device for evaluating the mechanism of micro-jet permeability enhancement in fractured reservoirs, including:

[0051] The resonant wave test bench 1 can generate low-frequency or high-frequency resonant waves, and the direction of the resonant wave is along the x direction or the z direction; this embodiment uses a low-frequency resonant wave test bench, and the direction of the resonant wave is along the x direction;

[0052] The flat plate model 2 with visualized homogeneous fracture distribution is installed on the resonant wave test bench 1, which includes the inlet, outlet and annular pressure port, and is used for the simulation of the microscopic jet seepage enhancement mechanism of fluctuating oil recovery in fractured reservoirs. The fluid flow in the flat plate model The direction is along the x direction or along the y direction, and the fluid flow direction in the plate model...

Embodiment 2

[0068] An experimental method for evaluating the micro-jet permeability enhancement mechanism of a fractured oil reservoir, using the above-mentioned experimental device, the experimental method includes the following steps:

[0069] (1) According to the experimental requirements, select a suitable visualized homogeneous fracture distribution plate model, record the shape of the fractures and matrix of the internal simulated reservoir, and measure the fracture density, fracture width, and fracture length in the plate model; in this embodiment, The visualized homogeneous fracture distribution flat plate model is a model in which parallel fractures are distributed and the displacement direction is parallel to the fracture direction, such as figure 2 a, the crack density is 1 / 10cm 2 , the slit length is 5cm, the slit width is 0.1cm, and the area outside the crack is etched into evenly distributed circular pores and connecting throats.

[0070] (2) Connect the flat plate model w...

Embodiment 3

[0077]An experimental method for evaluating the micro-jet permeability enhancement mechanism of a fractured oil reservoir, the operation steps of the experimental method are as described in Example 2, and the difference is that in step (6), the above-mentioned experimental device is used for water flooding The operation process of the oil replacement dynamic simulation test is as follows: ① Disconnect the pipeline between the intermediate container for oil delivery, the intermediate container for dyeing injection agent and the visualized homogeneous fracture distribution plate model; The water in the container is transported into the visualized homogeneous fracture distribution flat plate model; ③Record relevant parameters at multiple time points, and the relevant parameters include: recording time, and / or inlet water pressure value of the visualized homogeneous fracture distribution flat plate model, and / or Or visualize the oil-water distribution inside the homogeneous fractur...

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Abstract

The invention relates to an experimental device and method for evaluating a micro jet-flow permeation-increasing mechanism of fluctuation oil production of a fractured reservoir. The experimental device comprises a resonant wave test bed, a visual homogeneous crack distribution flat plate model, an annular pressure supplying part, a displacement pump, a formation water delivering middle container,an oil delivering middle container, a dyeing injection agent delivering middle container, a liquid container and a phenomenon observation part; the visual homogeneous crack distribution flat plate model is mounted on the resonant wave test bed and comprises an inlet, an outlet and an annular pressure opening; the output end of the annular pressure supplying part is connected with the annular pressure opening; input openings of the formation water delivering middle container, the oil delivering middle container and the dyeing injection agent delivering middle container are connected with an output opening of the displacement pump; output openings of the formation water delivering middle container, the oil delivering middle container and the dyeing injection agent delivering middle container are connected with the input end of the visual homogeneous crack distribution flat plate model; the liquid container is connected with the outlet; and the phenomenon observation part is mounted on the position corresponding to the visual homogeneous crack distribution flat plate model. The experimental device and method has the characteristics that the structure is simple, mounting and arrangement are convenient, the working performance is reliable, visualization is achieved, and the simulating effect is good; and the specific mechanism of the wave-induced micro jet-flow permeation-increasing effect of the fractured reservoir and expanding of the spread range can be effectively explained.

Description

technical field [0001] The invention relates to an evaluation experiment device and method for microscopic jet seepage enhancement mechanism of fluctuating oil reservoirs in fractured oil reservoirs, and belongs to the technical field of petroleum exploitation simulation experiments. Background technique [0002] Fractured reservoirs develop micro-fractures and pore-throats. The existence of micro-fractures increases the overall conductivity of the reservoir on the one hand, but on the other hand, the injected water tends to form water channels along the fractures during water flooding development. Reduce the overall water flooding development efficiency, especially in fractured low-permeability reservoirs, the water channeling caused by fractures is more severe, the interaction of water phase channeling between matrix and fractures is reduced, matrix crude oil is difficult to produce, and the degree of reservoir recovery is low. To increase the production degree of crude oi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/16E21B28/00
CPCE21B28/00E21B43/16
Inventor 刘静郑黎明吴飞鹏蒲春生李悦静徐加祥夏军勇
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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