Central permeation simulation core for laboratory experiments and preparation method thereof

A technology for permeation simulation and core simulation, which is applied in the field of medium permeation simulation core and its preparation for laboratory experiments, and can solve the problems of few quartz sand components, difficult to compact the base material, poor operability, etc., and achieves operability. Strong, low-cost, accurate and repeatable effects

Inactive Publication Date: 2013-06-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method changes the traditional method of preparing the simulated core with dry base material and knocking outside the pipe, so that the permeability of the simulated core is in the medium permeabi...

Method used

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  • Central permeation simulation core for laboratory experiments and preparation method thereof
  • Central permeation simulation core for laboratory experiments and preparation method thereof
  • Central permeation simulation core for laboratory experiments and preparation method thereof

Examples

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preparation example Construction

[0025] A method for preparing a medium-permeability simulated rock core for indoor experiments, carried out according to the following steps:

[0026] A. Weigh six components of quartz sand and cement according to the design requirements of the simulated rock core, mix them together, and stir them evenly to form a core base material;

[0027] B. Clean the inner wall of the core tube, and then tighten one end of the core tube until there is no water or air leakage;

[0028] C. Fill the core base material that has been stirred and mixed evenly into the core tube several times until the core tube is filled. The amount of base material filled each time is 150-200g. After each filling, use a pressurizing device Pressurize the filled base material to 20-25MPa with the pressurizing rod, and release the pressure after maintaining the pressure for 20-30s;

[0029] D. After the core tube is filled with quartz sand, tighten the other end until there is no water or air leakage;

[0030]...

Embodiment 1

[0035] Example 1 - Preparation of 100 mD simulated core

[0036] According to the physical simulation experiment in the microbial flooding laboratory, it is necessary to prepare a simulated core with a permeability of 100 mD. The components and weight ratio of the simulated core are as follows:

[0037]

[0038] The preparation method of medium permeability simulated rock core comprises the following steps:

[0039] A. Weigh the above six components of quartz sand and cement, mix them together, and stir them evenly to form a core base material. SiO in the quartz sand 2 The content is 99.5%, Fe 2 o 3 The content is 0.004%, and the cement is a silicate cement;

[0040] B. Clean the inner wall of the core tube, and then tighten one end of the core tube until there is no water or air leakage. The size of the core tube is Ф38mm×L600mm;

[0041] C. Fill the core base material that has been stirred and mixed evenly into the core tube several times until the core tube is filled...

Embodiment 2

[0046] Example 2 - Preparation of 50 mD simulated core

[0047] According to the physical simulation experiment in the microbial flooding laboratory, it is necessary to prepare a simulated core with a permeability of 50 mD. The components and weight ratio of the simulated core are as follows:

[0048]

[0049] The preparation method of medium permeability simulated rock core comprises the following steps:

[0050] A. Weigh the above six components of quartz sand and cement, mix them together, and stir them evenly to form a core base material. SiO in the quartz sand 2 The content is 99.5%, Fe 2 o 3 The content is 0.004%, and the cement is a silicate cement;

[0051]B. Clean the inner wall of the core tube, and then tighten one end of the core tube until there is no water or air leakage. The size of the core tube is Ф38mm×L600mm;

[0052] C. Fill the core base material that has been stirred and mixed evenly into the core tube several times until the core tube is filled. T...

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Abstract

The invention discloses a central permeation simulation core for laboratory experiments and a preparation method thereof. The central permeation simulation core comprises the following components in parts by weight: 100 parts of quartz sand of 600-425 micrometers, 100-120 parts of quartz sand of 425-250 micrometers, 300-330 parts of quartz sand of 250-180 micrometers, 280-300 parts of quartz sand of 180-150 micrometers, 120-130 parts of quartz sand of 150-100 micrometers, 50-60 parts of quartz sand of 75-50 micrometers and 10-50 parts of a cementing agent. The preparation method of the central permeation simulation core comprises the following steps of: (1) mixing and uniformly stirring six types of constituted quartz sand with the cementing agent so as to form a core base material; (2) uniformly filling the core base material which is uniformly stirred into a core barrel for a plurality of times; (3) filling saturated and filtered injection water into the core barrel; and (4) testing the permeability of the prepared simulation core by adopting a water phase permeability test method. The core has the advantages of simple preparation method, strong operability and high reliability and repeatability. The core can be widely applied to the laboratory physical simulation experiments of the oil field geological and chemical fields.

Description

technical field [0001] The invention relates to experimental supplies and preparation methods in the fields of oilfield geology and chemistry, in particular to a medium-permeability simulation rock core for indoor experiments and a preparation method thereof. Background technique [0002] In the oil recovery test in the petroleum industry, when doing indoor physical simulation experiments, it is necessary to use quartz sand to fill simulated cores with a certain permeability for experiments. The preparation of simulated cores is usually filled with quartz sand with a minimum particle size of 74-56 μm and a single particle size, and the cores are filled by beating outside the core tube. However, the prepared simulated cores all have a permeability above 500 mD. The larger the particle size of the quartz sand, the greater the permeability of the filled sandstone core. The "Reservoir Engineering Basic Knowledge Manual" [M] volume published by Petroleum Industry Press in Septem...

Claims

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Application Information

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IPC IPC(8): C04B28/34C04B28/24G01N1/28C04B14/06
Inventor 郭辽原宋智勇李彩风刘涛孙刚正曹功泽林军章郝滨高光军吴晓玲
Owner CHINA PETROLEUM & CHEM CORP
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