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Artificial rock core with controllable movable fluid and its manufacturing method

A technology of artificial core and manufacturing method, which is applied in the preparation of test samples, etc., can solve the problems of poor distribution accuracy of movable fluid and single pore structure distribution of artificial core, and achieve simple manufacturing procedures, controllable distribution of movable fluid, The effect of good technical support

Inactive Publication Date: 2019-10-25
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of single pore structure distribution of existing artificial rock cores and poor accuracy in simulating the distribution of movable fluids in different natural rock cores, the present invention provides an artificial rock core with controllable movable fluids and a manufacturing method thereof

Method used

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  • Artificial rock core with controllable movable fluid and its manufacturing method
  • Artificial rock core with controllable movable fluid and its manufacturing method
  • Artificial rock core with controllable movable fluid and its manufacturing method

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Mix 80g of quartz sand, 5g of epoxy resin cement, and 15g of sub-nanometer powder cement and stir thoroughly. Among them, the ratio of different mesh numbers of quartz sand: 2.11% for 200 mesh or more, 8.42% for 100-200 mesh, 15.79% for 60-100 mesh, 36.84% for 40-60 mesh, 31.58% for 30-40 mesh, 31.58% for 20-40 mesh 30 mesh is 5.26%; the mass percent of each component in the subnano-scale powdery cement is: tricalcium silicate is 20%, dicalcium silicate is 30%, tricalcium aluminate is 25%, crystalline calcium sulfate is 25%. Wipe the inner wall of the square carbon steel mold with acetone repeatedly to fully dilute the residual cement on the inner wall to make it as clean and pollution-free as possible, then divide the fully stirred mixture into three parts and pour it into the inner cavity of the mold. For each portion, the mixture was manually compacted with a compactor to ensure uniform particle distribution during subsequent compaction. Place the mold filled with ...

Embodiment 2

[0027] Mix 85g of quartz sand, 10g of epoxy resin cement, and 5g of subnano-scale powder-like cement and stir thoroughly. The ratio of different meshes of quartz sand is: 11.89% for 200 mesh or more, 7.58 for 100-200 mesh %, 60-100 mesh is 14.21%, 40-60 mesh is 33.16%, 30-40 mesh is 28.42%, 20-30 mesh is 4.74%; the mass percent of each component in subnano-scale powdery cement is : Tricalcium silicate is 20%, dicalcium silicate is 30%, tricalcium aluminate is 25%, crystalline calcium sulfate is 25%. Wipe the inner wall of the square carbon steel mold with acetone repeatedly to fully dilute the residual cement on the inner wall to make it as clean and pollution-free as possible, then divide the fully stirred mixture into three parts and pour it into the inner cavity of the mold. For each portion, the mixture was manually compacted with a compactor to ensure uniform particle distribution during subsequent compaction. Place the mold filled with the mixture on the central axis of...

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Abstract

The invention relates to an artificial core containing controllable and movable fluid, and a manufacturing method of the artificial core. The manufacturing method mainly comprises the following steps: firstly, evenly stirring quartz sand, traditional epoxy resin cement and sub-nanoscale powder cement, wherein the median particle diameter of the sub-nanoscale powder cement is within the range from 0.7 to 1.0mu m, and the sub-nanoscale powder cement is formed by tricalcium silicate, dicalcium silicate, tricalcium aluminate and crystallized calcium sulfate according to the mass ratio of (0.20-0.25) to (0.30-0.35) to (0.25-0.35) to (0.20-0.30); putting the mixture into a cylindrical steel mould, pressurizing, and drying at high temperature to obtain the artificial core. Due to the change of proportions of two types of mixtures, the artificial core has better similarity with the natural core in the macroscopic aspects such as porosity and permeability, and the distribution proportion of the movable fluid is changed within the specific range on the basis that different levels of pores in the artificial core reach the specific proportion; furthermore, the artificial core is higher in accuracy, thus meeting the experimental demands such as oil field three-mining chemical flooding optimization, and microscopic use law.

Description

technical field [0001] The invention relates to a rock core used for optimization of oil field chemical flooding scheme and research on microscopic pore production law, which belongs to an artificial rock core with controllable movable fluid and a manufacturing method thereof. Background technique [0002] For underground reservoirs exploited by long-term water flooding, the remaining oil is gradually enriched in small and medium pores. At present, most oil fields use chemical flooding to tap the potential of this part of the remaining oil. Core flooding experiment is very important to the selection of chemical flooding scheme, and the selection of core quality is particularly critical. However, due to the unrepeatability of natural cores, the coring process is complicated and uneconomical. Therefore, the use of artificial cores for chemical flooding scheme selection and Compared with natural cores, its percolation theory research has multiple advantages such as reusability ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28
Inventor 李俊键姜汉桥肖康康绍菲丁帅伟刘广为
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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