Preparation method of man-made reservoir physical model, and special cementing agent for man-made reservoir physical model

A physical model and cementing agent technology, applied in the field of artificial reservoir physical model, can solve the problem that the real characteristics of natural reservoirs cannot be well simulated, the lattice structure of mineral raw materials is easily changed or destroyed, and the pH value of surfactant precipitation is increased. problems, to achieve the effects of scientific and reasonable composition, improved mechanical strength and stability, and suitable pressing pressure and time.

Active Publication Date: 2014-12-24
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process of this method is relatively complicated, and the bare pressure bearing capacity of the prepared artificial core is only 7.5MPa, which cannot meet the high-pressure displacement requirements; in addition, it requires a high drying temperature, which is easy to change or destroy the crystal lattice of mineral raw materials structure, which cannot simulate various real characteristics of natural reservoirs well; moreover, the calcium silicate component used in the cement will cause many uncontrollable factors in the prepared reservoir model when simulating water flooding or chemical flooding ( Such as increasing the pH value of water, causing surfactant precipitation, etc.), are not conducive to the practical application of reservoir models

Method used

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  • Preparation method of man-made reservoir physical model, and special cementing agent for man-made reservoir physical model
  • Preparation method of man-made reservoir physical model, and special cementing agent for man-made reservoir physical model
  • Preparation method of man-made reservoir physical model, and special cementing agent for man-made reservoir physical model

Examples

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Effect test

Embodiment 1

[0034] Example 1 Preparation of a homogeneous artificial reservoir physical model for simulating the natural core of a certain reservoir in Daqing

[0035] 1. Determination of natural core composition and physical parameters

[0036] The natural core comes from Daqing Oilfield, XRD whole rock analysis is carried out on it by X-ray diffractometer, the XRD pattern is shown in figure 1 , and the corresponding composition results are shown in Table 1; the gas permeability, porosity and pore volume were measured by the method described in the SY / T5336-2006 industry standard, and the results are shown in Table 2.

[0037] 2. Preparation of a homogeneous artificial reservoir physical model

[0038] Add 450g of sodium fluorosilicate to 2.31kg of water glass, stir at room temperature until the sodium fluorosilicate is evenly dispersed, then add 240g of sodium aluminosilicate, stir at room temperature until the sodium aluminosilicate is evenly dispersed, and obtain 3kg of special ceme...

Embodiment 2

[0042] Example 2 Preparation of a homogeneous artificial reservoir physical model for simulating the natural core of a certain reservoir in Daqing

[0043] 1. Determination of natural core composition and physical parameters

[0044] The natural core comes from Daqing Oilfield, and its XRD pattern is shown in image 3 , the corresponding composition results are shown in Table 1, and the gas permeability, porosity and pore volume results are shown in Table 2.

[0045] 2. Preparation of a homogeneous artificial reservoir physical model

[0046] Add 540g of sodium fluorosilicate to 2.772kg of water glass, stir at room temperature until uniformly dispersed, then add 288g of sodium aluminosilicate, stir at room temperature until uniformly dispersed, and prepare a 3.6kg artificial reservoir physical model Cementing agent, wherein the mass content of each component is: water glass 77%, sodium fluorosilicate 15%, sodium aluminosilicate 8%.

[0047] According to the gas permeability...

Embodiment 3

[0049] Example 3 Preparation of Heterogeneous Artificial Reservoir Physical Model

[0050] Add 429g of sodium fluorosilicate to 2.64kg of water glass, stir at room temperature until uniformly dispersed, then add 231g of sodium aluminosilicate, stir at room temperature until uniformly dispersed, and prepare a 3.3kg artificial reservoir physical model Cementing agent, wherein the mass content of each component is: water glass 80%, sodium fluorosilicate 13%, sodium aluminosilicate 7%.

[0051] According to the gas permeability requirement of 850mD, 5.09kg of quartz sand of 40-120 mesh, 185g of feldspar of 400-1000 mesh, 185g of clay mineral of 400-1000 mesh were respectively taken, and after mixing evenly, 5.46kg of hyperpermeable mineral raw materials were obtained (wherein The mass ratio of quartz sand, feldspar and clay minerals is 27.5:1:1);

[0052] According to the gas permeability requirement of 330mD, take 3.19kg of quartz sand of 20-100 mesh, 1.37kg of feldspar of 400-1...

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Abstract

The invention provides a preparation method of a man-made reservoir physical model, and a special cementing agent for the man-made reservoir physical model. The cementing agent comprises the following components in parts by weight: 70-80 parts of sodium silicate, 10-25 parts of curing agent, and 5-10 parts of intensifier, wherein the intensifier is aluminosilicate. The method for preparing the man-made reservoir physical model by adopting the special cementing agent comprises the following steps: firstly, evenly mixing the special cementing agent with mineral raw materials according to the weight ratio of (20-30):100 to obtain a mixed material; filling the mixed material into a mold for press-forming, demolding the formed mixed material and drying at the temperature being not higher than 80DEG C, to obtain the man-made reservoir physical model. The man-made reservoir physical model prepared by adopting the preparation method is high in mechanical strength and good in stability, and the stimulated natural reservoir can be truly reflected as the constitutions of the mineral raw materials are not changed and damaged, and the man-made reservoir physical model can be widely applied in the research and development field of petroleum and / or natural gas.

Description

technical field [0001] The invention relates to a method for preparing a physical model of an artificial reservoir, in particular to a method for preparing a physical model of an artificial oil and gas field reservoir and its special cement, belonging to the technical field of physical models of artificial reservoirs. Background technique [0002] Due to the shortage of resources, poor repeatability, and inability to simulate the heterogeneity of reservoirs in natural cores, there is an urgent need for artificial reservoir physical models in oil and gas field development physical simulation experiments. An essential foundation in research. At present, the commonly used artificial reservoir physical model preparation methods mainly include epoxy resin cemented quartz sand and aluminum phosphate quartz sand sintering. However, when the artificial reservoir model is prepared by the epoxy resin cementation process, the epoxy resin is completely coated on the surface of the mine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/26B28B3/02
Inventor 岳湘安贺杰曹磊栾强
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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