Carbonate slab core preparation method for fine characterization of fracture structure
A technology for fracture structure and carbonate rock, which is applied in the preparation, sampling, and instrumentation of test samples, and can solve the problems that fracture parameters cannot be effectively controlled and fracture structures cannot be described finely.
Active Publication Date: 2020-10-30
NORTHEAST GASOLINEEUM UNIV
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[0006] The preparation method of the carbonate rock slab core with finely characterized fracture structure of the present invention successfully produces an artificial rock core with finely characterized fracture structure, which solves the problem that the fracture parameters cannot be effectively controlled and the fracture structure occurred in the previous rock core preparation process Problems that cannot be described in detail
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[0052] (1) Target core: the prepared fracture density is 1.736×10 -4 , Carbonate slab core with a fracture dip angle of 30°, a fracture length of 20mm, a fracture width of 10mm, and a fracture height of 0.1mm.
[0053] (2) Mold preparation: the mold is in the shape of a cuboid, and the planned length of the core mold is 400mm, the width is 200mm, and the height is 120mm. Therefore, four side carbon steel plates are selected, two of which are 400mm in length, 120mm in width, and 20mm in thickness; the other two are 200mm in length, 120mm in width, and 20mm in thickness. The length of the bottom plate is 360mm, the width is 160mm, and the thickness is 20mm. The length of the upper platen is 400mm, the width is 200mm, and the thickness is 20mm. The side of the carbon steel plate is punched with uniform screw holes, connected by screws, and the outer side is shaped by reinforced steel bars. Such as Figure 8 shown.
[0054] (3) Preparation of materials
[0055] Marble partic...
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Abstract
The present invention proposes a method for preparing a carbonate rock slab core with fine fracture structure characterization, which includes the following steps in sequence: determination of basic data of the target core, preparation of basic materials, preparation of fracture representation bodies and preparation of the target core. The preparation method of the carbonate rock slab core with finely characterized fracture structure of the present invention proposes an intermediate material with a cubic structure called the fracture representation body, and the size and inclination angle of the fracture to be produced are determined in advance by high-pressure water jet cutting technology Accurate characterization, the fracture structure can be simulated without angle placement in the later stage of core preparation. The prepared core can be used for indoor flow experiments of fractured carbonate rocks, which lays the foundation for a deep understanding of the seepage mechanism of fractured carbonate rocks.
Description
technical field [0001] The invention relates to a method for preparing a carbonate rock slab core with finely characterized fracture structure. Background technique [0002] Fractured carbonate rocks are rich in reserves, and fractures are not only important storage spaces but also necessary seepage channels. However, due to the complex causes of fractures, various controlling and influencing factors, and highly heterogeneous distribution, scientific researchers first theoretically restrict the cognition of underground reservoirs and reservoir fluid flow laws. In addition, coring of this type of reservoir is difficult and the success rate is very low. The existing artificial core fracture-making technology is not mature enough to meet the requirements of indoor core flow experiments, which further limits the research progress of the staff in the experiment, resulting in scientific research. Workers do not have a clear understanding of the geological conditions of the block,...
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IPC IPC(8): G01N1/28
CPCG01N1/286
Inventor 王立军韩玲玲周彦霞贺凤云余强李淑娟关彦磊
Owner NORTHEAST GASOLINEEUM UNIV