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Artificial sandstone core, preparation method and use thereof

An artificial sandstone and core technology, applied in the field of physical simulation of oil and gas field development, can solve the problem of single pore throat distribution and achieve stable performance, diverse components, and simple structure

Inactive Publication Date: 2014-06-25
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the pore-throat distribution curve of the existing artificial sandstone core is single-peak distribution, and the pore-throat distribution is single, the purpose of the present invention is to provide an artificial sandstone core and its preparation method. The artificial sandstone core has stable properties and more diverse components. , the pore-throat structure is closer to the natural core, the pore-throat distribution range is wider, the distribution curve is adjustable, and it presents a bimodal distribution. The artificial sandstone core can be well used for physical simulation experiments of sandstone reservoirs in the laboratory

Method used

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  • Artificial sandstone core, preparation method and use thereof
  • Artificial sandstone core, preparation method and use thereof

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Experimental program
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specific Embodiment 1

[0049] An artificial sandstone core is mainly prepared from the following raw materials according to the weight percentage of each component:

[0050]

[0051] The cement is composed of three kinds of additives, epoxy resin and silicate mixture, in parts by weight: 0.1 part of dibutyl phthalate, 0.01 part of ethylenediamine, 0.1 part of acetone, 0.3 part of epoxy resin and 0.5 part of the silicate mixture.

[0052] The particle size of the feldspar is 40-80 mesh, 80-120 mesh and above 120 mesh.

[0053] The particle size of the quartz sand is 40-60 mesh, 60-100 mesh, 100-200 mesh and above 200 mesh.

[0054] The preparation method of artificial sandstone core as described above, described method comprises the steps:

[0055] (1) Mix the ingredients in the formula evenly and sieve them;

[0056] (2) Inject the mixture obtained in step (1) into the mold to distribute the sand evenly, then place the mold on a pressure testing machine, apply pressure to the mold for 5 minute...

specific Embodiment 2

[0060] An artificial sandstone core is mainly prepared from the following raw materials according to the weight percentage of each component:

[0061]

[0062] The cement is composed of three kinds of additives, epoxy resin and silicate mixture, which are composed of 0.5 parts of dibutyl phthalate, 0.1 part of ethylenediamine, 1.2 parts of acetone, and 1.5 parts of epoxy resin in parts by weight. and 5 parts of the silicate mixture.

[0063] The particle size of the feldspar is 40-80 mesh, 80-120 mesh and above 120 mesh;

[0064] The particle size of the quartz sand is 40-60 mesh, 60-100 mesh, 100-200 mesh and above 200 mesh.

[0065] The preparation method of artificial sandstone core as described above, described method comprises the steps:

[0066] (1) Mix the ingredients in the formula evenly and sieve them;

[0067] (2) Inject the mixture obtained in step (1) into the mold to distribute the sand evenly, then place the mold on a pressure testing machine to pressurize...

specific Embodiment 3

[0071] An artificial sandstone core is mainly prepared from the following raw materials according to the weight percentage of each component:

[0072]

[0073] The cement is composed of three kinds of additives and epoxy resin, which are composed of 0.3 parts of dibutyl phthalate, 0.05 parts of ethylenediamine, 0.8 parts of acetone, 0.7 parts of epoxy resin and silicate mixture by weight. 3 copies.

[0074] The particle size of the feldspar is 40-80 mesh, 80-120 mesh and above 120 mesh.

[0075]The particle size of the quartz sand is 40-60 mesh, 60-100 mesh, 100-200 mesh and above 200 mesh.

[0076] The preparation method of artificial sandstone core as described above, described method comprises the steps:

[0077] (1) Mix the ingredients in the formula evenly and sieve them;

[0078] (2) Inject the mixture obtained in step (1) into the mold to distribute the sand evenly, then place the mold on a pressure testing machine to pressurize the mold for 25 minutes and then re...

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Abstract

The invention discloses an artificial sandstone core used in the indoor physical simulation experiment, and belongs to the technical field of oil-gas field development simulation. The artificial sandstone core is prepared from the following raw materials by weight percent: 2-20% of clay, 5-25% of cement, 0-10% of feldspar (not containing 0) and 70-95% of quartz sand. The pore throat structure distribution curve of the core is adjustable, the wettability is adjustable, the pore throat distribution range is wider and capable of representing double-peak distribution, and the pore throat structure is more complex. The substance component in the stratum natural rock is generated through the silicate mixture in the cement and the subsequent treatment so that the component of the artificial sandstone is diverse, the defects that the artificial core pore throat distribution and wettability are much different from those of the natural core are effectively overcome, the natural core can be more accurately and really simulated, the artificial sandstone core is simple in structure and stable in performance and suitable for replacing natural core in the physical simulation.

Description

technical field [0001] The invention relates to an artificial sandstone core, a preparation method and application thereof. The artificial sandstone core is used in indoor physical simulation experiments and belongs to the technical field of physical simulation for oil and gas field development. Background technique [0002] At present, the experimental model used in physical simulation is mainly the core model. Due to the disadvantages of complex process, difficulty and high cost in natural coring, artificial cores are generally used instead of natural cores for physical simulation experiments. [0003] However, due to the complexity of the genesis of natural cores, it is impossible to simulate its complex genesis when making artificial cores, so that the heterogeneity close to that of natural cores can be achieved. However, the current conventional artificial cores are quite different from natural cores in pore-throat distribution and wettability. Large, its pore-throat st...

Claims

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Application Information

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IPC IPC(8): C04B28/24C04B14/10C04B14/06
Inventor 李宜强李彦阅王彦升王付勇
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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