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Fracture-cavity carbonate reservoir physical model, displacement simulation experiment device and system

A technique for carbonate reservoirs and physical models, applied in the fields of physical models of fractured-cavity carbonate reservoirs, displacement simulation experiment devices and systems, which can solve the problems of ignoring complex configuration relationships, difficult model control, and connection relationships Complexity and other issues, to achieve the effect of enhancing operability and flexibility, reducing experimental costs, and simplifying the manufacturing process

Active Publication Date: 2018-01-05
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The existing physical models of fracture-cavity reservoirs mainly include glass tube model, etched flat plate model, pouring irregular model, core fracture-cavity model, etc. Most of them try to make the complete fracture-cavity combination system into a relatively small space, resulting in The geometric similarity criterion cannot be met, and the complex configuration relationship is ignored, which eventually leads to serious distortion of the simulation process, and the simulation results lack guidance
The caves in the reservoir have various shapes, complex filling characteristics, large differences in fracture conductivity, and complex connection relationships. The existing models are difficult to control during the production process, and the flexibility of the experimental process is poor.

Method used

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  • Fracture-cavity carbonate reservoir physical model, displacement simulation experiment device and system
  • Fracture-cavity carbonate reservoir physical model, displacement simulation experiment device and system
  • Fracture-cavity carbonate reservoir physical model, displacement simulation experiment device and system

Examples

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Effect test

Embodiment 1

[0066] This example is to simulate a kind of fracture-vuggy carbonate rock salt reservoir after natural bottom water displacement development, water flooding development, N injection 2 In the process of flooding development, water injection and gas injection adopt the method of fracture injection and cavern production, that is, the injection port 10 of the physical model is the injection port, and the production port 11 of the physical model is the production port, specifically including the following steps:

[0067] (1) Model connection and sand filling

[0068] Step one, such as image 3 As shown, according to the experimental model to connect the fracture-cavity model, the model contains 12 karst caves, including 2 karst caves with an inner diameter of 500mm, 3 karst caves with an inner diameter of 400mm, and 6 karst caves with an inner diameter of 300mm. 200mm total 1. There are 19 cracks, including 3 large cracks, 4 medium cracks and 12 small cracks. The fracture is co...

Embodiment 2

[0083] This example is for simulating the development of natural bottom water displacement, water flooding development and N injection in a fracture-cavity carbonate rock salt reservoir. 2 In the flooding development process, water injection and gas injection adopt cave injection and cave production, that is, the injection port 10 of the physical model is the injection port, and the production port 11 of the physical model is the production port, specifically including the following steps:

[0084] (1) Model connection and sand filling

[0085] Step one, such as Figure 4 As shown, the fracture-cavity model is connected according to the experimental model. The model contains 15 caves, including 4 caves with an inner diameter of 500mm, 1 cave with an inner diameter of 400mm, and 10 caves with an inner diameter of 300mm. The inner diameter of the cave is 200mm total 1. There are 30 cracks, including 6 large cracks and 24 small cracks. The fracture is connected with the karst ...

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Abstract

The present invention relates to a physical model of a fracture-cavity carbonate reservoir, a displacement simulation experiment device and a system, wherein the physical model includes: karst caves, fractures, substrates and fillings; wherein the karst caves and the The cracks are placed on the base plate, the caves are connected with the cracks, and the filling is used to simulate the filling of the caves; the physical model is provided with an injection port, a production port and a bottom water port. The visual displacement experimental device for fractured-vuggy reservoirs is closer to the actual reservoir model, especially for dissolved-vug reservoirs, which can simulate the discretization distribution characteristics of fractured-vuggy reservoirs. It is more practical for the simulation of filling caves. In addition, the detachability of the fracture-cavity model enhances the operability and flexibility of the experiment, shortens the cycle of model establishment, adjustment, and maintenance, and the model manufacturing process is simple and reusable, which greatly reduces the cost of the experiment.

Description

technical field [0001] The invention relates to the technical field of oil recovery engineering, in particular to a physical model of a fractured-cavity carbonate rock reservoir, a displacement simulation experiment device and a system. Background technique [0002] Fracture-cavity carbonate reservoirs are reformed reservoirs. Due to the influence of lithology, structure and dissolution, the type of storage space is obviously different from that of clastic rock reservoirs. Vugs, holes, and fractures are the main storage spaces and flow channels, and the fractured-vuggy reservoirs have the characteristics of random distribution in space, complex configuration relationships, and various shapes and scales. Karst caves refer to holes with a diameter larger than 50mm. Dissolved holes mainly refer to holes with a diameter between 2mm and 50mm. The cracks are mainly structural and dissolution cracks, and the opening of cracks is mostly less than 1mm. According to different combina...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/16
Inventor 侯吉瑞汪勇宋兆杰张景惟赵腾杨柳吴颉衡
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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