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Preparation method of artificial core in petroleum geology research and application of artificial core

A technology of artificial core and manufacturing method, applied in the field of petroleum exploration, can solve the problems of high drilling cost, many core samples, difficult core extraction and the like

Inactive Publication Date: 2016-05-04
河北地质大学 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complex formation conditions, core extraction is not easy, and more core samples are required for research, resulting in higher drilling costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for making artificial rock cores in petroleum geological research, comprising the following steps:

[0025] 1) Prepare n pieces of circular aluminum foils with diameter d=3-10mm and thickness h=0.02mm to simulate cracks, wherein n=50;

[0026] 2) Preparation of cement:

[0027] Weigh 20 parts of epoxy resin, 6 parts of dibutyl phthalate, and 2 parts of ethylenediamine in parts by weight, pour them into a beaker and stir fully, add 10 parts of acetone, and stir again fully, and wait for 4 hours to obtain cement;

[0028] 3) Mix 30 parts by weight of quartz sand, 10 parts by weight of natural rock core debris, 5 parts by weight of a nanoporous ceramic material with a porosity of 20% to 60% and a pore diameter ranging from 1 nanometer to 500 nanometers, and 3 parts by weight of a circular aluminum foil , stirring, continue to add 2 parts by weight of polyethylene glycol and 2 parts by weight of citric acid and stir;

[0029] 4) Add 20 parts by weight of the cem...

Embodiment 2

[0035] A method for making artificial rock cores in petroleum geological research, comprising the following steps:

[0036] 1) Prepare n pieces of circular aluminum foils with diameter d=3-10mm and thickness h=0.02mm to simulate cracks, wherein n=70;

[0037] 2) Preparation of cement:

[0038] Weigh 30 parts of epoxy resin, 10 parts of dibutyl phthalate, and 4 parts of ethylenediamine in parts by weight, pour them into a beaker and stir fully, add 15 parts of acetone, and stir fully again, wait for 5 hours, and get cement;

[0039] 3) Mix 40 parts by weight of quartz sand, 15 parts by weight of natural rock core debris, 7 parts by weight of a nanoporous ceramic material with a porosity of 20% to 60% and a pore diameter ranging from 1 nanometer to 500 nanometers, and 4 parts by weight of a circular aluminum foil , stirring, continue to add 3 parts by weight of polyethylene glycol and 1 part by weight of citric acid and stir;

[0040] 4) Add 30 parts by weight of the cement i...

Embodiment 3

[0046] A method for making artificial rock cores in petroleum geological research, comprising the following steps:

[0047] 1) Prepare n pieces of circular aluminum foils with diameter d=3-10mm and thickness h=0.02mm to simulate cracks, wherein n=100;

[0048] 2) Preparation of cement:

[0049] Weigh 40 parts of epoxy resin, 15 parts of dibutyl phthalate, and 5 parts of ethylenediamine in parts by weight, pour them into a beaker and stir fully, add 20 parts of acetone, and stir fully again, wait for 6 hours, and get cement;

[0050] 3) Mix 50 parts by weight of quartz sand, 20 parts by weight of natural rock core debris, 10 parts by weight of a nanoporous ceramic material with a porosity of 20% to 60% and a pore diameter ranging from 1 nanometer to 500 nanometers, and 5 parts by weight of a circular aluminum foil , stirring, continue to add 4 parts by weight of polyethylene glycol and 1 part by weight of citric acid and stir;

[0051] 4) Add 40 parts by weight of the cement...

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Abstract

The invention discloses a preparation method of an artificial core in a petroleum geology research. The preparation method comprises the following steps: during the process of cementing quartz sand and epoxy resin through a cementing agent, introducing a nano porous material and a metal thin sheet, performing curing under pressure, soaking a core in acid or alkali or leaching the core to form slits, finally flushing the artificial core with distilled water, and drying. By the adding of polyethylene glycol and citric acid, the artificial core has high surface wettability, and the surface property is closer to natural core. According to the preparation method, the slits, micron-level pores and nano-level pores of the artificial core can be quantitatively controlled, so that the prepared artificial core is extremely high in similarity with the natural core and can meet simulation and test on such physical properties as sound wave, transfusion and conductivity of the core in the petroleum geology research, thus providing an experimental support for oil-gas exploration development.

Description

technical field [0001] The present application relates to the field of petroleum exploration, in particular to a method for making an artificial core in petroleum geological research and its application. Background technique [0002] Core is the most intuitive and practical data for understanding the formation and its fluid characteristics during the exploration and development of oil and gas fields. Natural cores are obtained by sidewall coring and drilling coring, and the latter is usually the main method. In the research, it is necessary to select an appropriate amount of wells within the scope of the oil and gas field, and drill a certain number of cores for the relevant oil and gas bearing layers. Through observation, analysis and research, various property parameter data of formations can be obtained. However, due to the complex formation conditions, core extraction is not easy, and more core samples are required for research, resulting in higher drilling costs. The...

Claims

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Application Information

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IPC IPC(8): G01N1/28
CPCG01N1/286
Inventor 杜江民斯尚华王萌聂万才罗川又徐智陈世海
Owner 河北地质大学
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