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A fracture-cavity artificial rock core and its preparation method

An artificial rock core and fracture-cavity technology, applied in the field of fracture-cavity artificial rock core and its preparation, can solve the problems of natural core acquisition restrictions, complex fluid flow rules, and inconvenient experimental research, so as to facilitate industrialization and production. The conditions are easy to control and the preparation process is simple

Active Publication Date: 2020-08-04
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

During the development experiment of carbonate oil and gas reservoirs, due to the complex distribution of oil and water in the reservoir space leads to the complexity of the fluid flow law, it is difficult for ordinary cores to simulate the multi-scale of the reservoir space and the heterogeneity of the reservoir. qualitative, and the acquisition of natural cores required for experiments is limited in many ways, which brings a lot of inconvenience to experimental research

Method used

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  • A fracture-cavity artificial rock core and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Sieve out the activated carbon particles with a particle size of 80-100 mesh quartz sand and 0.1-2mm;

[0029] (2) Taking the total mass of the fracture-cavity artificial rock core as a benchmark, take the raw materials in the following mass percentages: 15% epoxy resin, 80% quartz sand and 5% activated carbon particles, fully mix each component, and stir evenly ;

[0030] (3) Put the above-mentioned homogeneously mixed raw materials into the artificial rock core making mold, compact with a pressure of 5 MPa, let stand for 6 hours and release the pressure after demoulding to obtain a rough artificial rock core;

[0031] (4) Put the rough artificial rock core out of the mold and put it into an oven for drying and solidification. The drying temperature is 80° C., the drying time is 24 hours, and it is naturally cooled to normal temperature;

[0032] (5) put the above dried and cooled blank artificial rock core into a high temperature furnace for sintering, the sinter...

Embodiment 2

[0035] (1) Sieve out the activated carbon particles whose particle size is 500~600 mesh quartz sand and 0.1~4mm;

[0036] (2) Taking the total mass of the fracture-cavity artificial rock core as a benchmark, take the raw materials of the following mass percentages: 25% epoxy resin, 40% quartz sand and 35% activated carbon particles, fully mix each component, and stir evenly ;

[0037] (3) Put the above-mentioned homogeneously mixed raw materials into the artificial rock core making mold, compact with a pressure of 15 MPa, let stand for 2 hours, and release the pressure to obtain the artificial rock core;

[0038] (4) Put the rough artificial rock core out of the mold and put it into an oven for drying and solidification. The drying temperature is 120° C., the drying time is 12 hours, and it is naturally cooled to normal temperature;

[0039] (5) put the above dried and cooled blank artificial rock core into a high temperature furnace for sintering, the sintering temperature i...

Embodiment 3

[0042] (1) Sieve out quartz sand with a particle size of 800-1000 mesh and activated carbon particles with a particle size of 0.1-0.5 mm;

[0043] (2) Taking the total mass of the fracture-cavity artificial rock core as a benchmark, take the raw materials in the following mass percentages: 20% epoxy resin, 60% quartz sand and 20% activated carbon particles, fully mix each component, and stir evenly ;

[0044] (3) Put the above-mentioned homogeneously mixed raw material into the artificial rock core making mold, compact it with a pressure of 10 MPa, let it stand for 4 hours and then release the pressure to obtain the artificial rock core;

[0045] (4) Put the rough artificial rock core out of the mold and put it into an oven for drying and solidification. The drying temperature is 100° C., the drying time is 16 hours, and it is naturally cooled to normal temperature;

[0046] (5) put the above dried and cooled blank artificial rock core into a high temperature furnace for sint...

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Abstract

The invention relates to the technical field of oil development experiments, in particular to a fracture-vug type artificial rock core and a preparation method thereof. The total mass of the fracture-vug type artificial rock core serves as the standard, and the fracture-vug type artificial rock core comprises, by mass, 15-25% of epoxy resin, 40-80% of quartz sand and 5-35% of activated carbon particles. A hole obtained through sintering of activated carbon to simulate a karst cave in a real stratum, quart sand simulates microfractures, and the multi-scale performance of a reservoir space and anisotropism of a reservoir are achieved; urgent requirements of experimental study of a fracture-vug reservoir are met, a foundation is laid for deeply researching the fracture-vug reservoir, the preparation process is simple, production conditions are easy to control, and industrialization is facilitated.

Description

technical field [0001] The invention relates to the technical field of petroleum development experiments, in particular to a fracture-cavity artificial rock core capable of simulating storage space and a preparation method thereof. Background technique [0002] With the increasing demand for oil and gas resources in my country and the maturity of related exploration and production technologies, carbonate oil and gas reservoirs have gradually occupied an important position. Affected by burial depth and diagenetic environment, dissolved caves, dissolved pores and fractures are formed. In carbonate fractured-cavity reservoirs, dissolved caves are the main storage space and fractures are the main flow channels, which belong to strong heterogeneity, Unconventional oil and gas reservoirs that are difficult to develop. During the development experiment of carbonate oil and gas reservoirs, due to the complex distribution of oil and water in the reservoir space leads to the complexi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28
CPCG01N1/286
Inventor 宋付权薄利文纪凯宋兴兴朱根民
Owner ZHEJIANG OCEAN UNIV
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