Method for preparing carbonatite plate-shaped cores with finely represented crack structures
A technology for fracture structure and carbonate rock, which is applied in the preparation, sampling, and measurement devices 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: 2019-01-18
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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[0051] (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.
[0052] (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.
[0053] (3) Preparation of materials
[0054] Marble partic...
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Abstract
The invention provides a method for preparing carbonatite plate-shaped cores with finely represented crack structures. The method comprises the following sequential steps of: determination of target core basic data, preparation of basic materials, preparation of a crack representation body and preparation of target core. According to the method for preparing carbonatite plate-shaped cores with finely represented crack structures, an intermediate substance of a cubic structure called as the crack representation body is proposed, the sizes and inclination angles of to-be-made cracks are accurately represented in advance through a high pressure water jet cutting technology, and during core preparation in the later stage, crack structures can be simulated through no-angle placing. The obtainedcores can undergo the indoor cracked carbonatite flow experiment, so that a foundation is laid for deep understanding of a cracked carbonatite flow mechanism.
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