Apparatus and method for physically simulating hydraulic fracturing of radial aperture of loose sandstone

A hydraulic fracturing and physical simulation technology, applied in the field of physical simulation, can solve the problems of staying, no monitoring of crack expansion and extension inside the test piece, and inability to guarantee the radial hole area, etc.

CN107356483AActive Publication Date: 2017-11-17CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2017-11-17

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Abstract

The invention relates to an apparatus and a method for physically simulating the hydraulic fracturing of the radial aperture of a loose sandstone. The apparatus for physically simulating the hydraulic fracturing of the radial aperture of the loose sandstone comprises a pumping device, a middle container, a fracturing liquid pipeline, a simulation shaft, a simulation radical aperture, a fracturing test piece and a sound acquisition device. The apparatus , adopting the above technical scheme, has a simple structure, is convenient to use, and presets the radical aperture through adopting a n appropriate technology during experiments in order to guarantee that the porosity in the radical aperture area is obvious than the porosity of a surrounding rock sample and real-time monitoring of the expansion and extension condition of a crack in a test piece during fracturing is avoided.
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Description

technical field

[0001] The invention relates to a physical simulation method, in particular to a physical simulation device method capable of simulating the radial hole hydraulic fracturing process of unconsolidated sandstone, and simultaneously monitoring and ascertaining the crack initiation position and extension direction of the crack. Background technique

[0002] At present, the domestic research on radial drilling technology is mainly in the field of conventional reservoirs, and the research on the basic theory and method of radial drilling three-dimensional development for unconsolidated sandstone reservoirs is still insufficient. At the same time, hydraulic fracturing has been widely used in the process of oil field development, and the results achieved are also remarkable. However, people's understanding of the fractures produced during the fracturing process is still relatively low, such as the location of the crack initiation and the direction of extension of the...

Examples

Embodiment Construction

[0030] Below in conjunction with accompanying drawing, the technical scheme Sai of the present invention is further described.

[0031] Such as Figure 1-Figure 2 As shown, a physical simulation device for hydraulic fracturing of loose sandstone radial holes in the present invention includes a constant speed and constant pressure pump 1, an intermediate container 2, a fracturing fluid 3, a fracturing fluid pipeline 4, a simulated wellbore 5, and a simulated radial hole 6. Fracturing test piece 7, steel cubic mold 8, g-shaped clip 9, acoustic emission probe 10, acoustic emission signal amplifier 11, acoustic emission receiver 12. The raw materials of the fracturing test piece 7 include quartz sand, clay and cement, which are used to simulate unconsolidated sandstone. During the production process, the simulated wellbore 5 and the simulated radial hole 6 are placed in the fracturing test piece 7, wherein the clay includes illite powder and montmorillonite powder. The fracturin...