GB/T 34533-2023Determination of porosity,permeability and saturation of shale (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents" drafting.

This document replaces GB/T 34533-2017 "Determination of Shale Porosity by Helium Method and Permeability by Pulse Decay Method". Compared with GB/T 34533-2017, in addition to structural adjustments and editorial changes, the main technical changes are as follows:

a) Deleted the terms "upstream chamber", "downstream chamber", "upstream pressure" and "downstream pressure" (see 3.1~3.4 of the 2017 edition);

b) Added the terms "permeability by steady state method", "permeability by pressure drop method", "porosity by liquid saturation method" and "liquid saturation method" Determination of water saturation by sum method", "Determination of water saturation by NMR method" and "Determination of water saturation by distillation extraction method" (see 3.3~ 3.8);

c) Added "shale rock sample preparation" (see Chapter 4);

d) Increased the preparation requirements for irregular shale rock samples (see 4.1.2);

e) Changed the drying conditions of shale rock samples (see 4.3, 6.3.1.3 of the 2017 edition);

f) Added "liquid saturation method porosity tester", "steady state method permeability tester", "pressure drop method permeability tester" and "three-dimensional Instrument technical indicators of "scanner", "absolute ethanol" and "oil washing reagent" (see 5.1.2, 5.1.4~5.1.6, 5.2.3, 5.2.4);

g) Changed the division value of the vernier caliper (see 5.1.9, 5.1.5 of the 2017 edition);

h) Changed the expression method of pressure sensor/differential pressure sensor accuracy (see 5.1.1, 5.1.3~5.1.5, 5.1.1, 2017 version 5.1.2).

i) The description of the principle of porosity measurement by the helium method has been changed (see 6.1.1, 4.1 of the 2017 edition);

j) Added the total volume measurement method in porosimetry by helium method (see 6.1.3);

k) Change "volume calibration" to "volume correction" (see 6.1.4, 6.2.2.2, 6.3.2.2 of the 2017 edition);

l) The judgment conditions for porosity pressure balance of the helium method have been changed [see c) in 6.1.4.1 and c) in 6.1.5.1, 6.2.2.2, 2017 edition 6.2.2.3];

m) Added the precautions for porosity determination by the helium method (see 6.1.7);

n) Added the liquid saturation porosity measurement method (see 6.2);

o) Added "steady state method for permeability determination", "notes" for pulse decay method for permeability determination, "pressure drop method for permeability determination method" (see 7.1, 7.2.5, 7.3);

p) Changed the description of the principle of the pulse decay method for permeability determination (see 7.2.1, 4.2 of the 2017 edition);

q) Added "liquid saturation method for determination of water saturation", "nuclear magnetic resonance method for determination of water saturation" and "distillation extraction method for determination of water saturation Water saturation determination method" (see 8.1~8.3);

r) Added the rounding of water saturation value of shale core (see 9.2.3).

This document was first published in 2017, and this is the first revision.

1 Scope

This document describes the determination of shale porosity by the helium method and the liquid saturation method; by the steady state method, the pulse decay method and the pressure drop method Rock permeability; Determination method for water saturation of shale by liquid saturation method, nuclear magnetic resonance method and distillation extraction method.

This document is applicable to shale porosity determination by helium method and liquid saturation method; it is applicable to shale by steady state method, pulse decay method and pressure drop method Permeability determination; suitable for determination of shale water saturation by liquid saturation method, nuclear magnetic resonance method and distillation extraction method.

The porosity measurement range of the helium gas method in this document is 1.0%~10.0%, and the porosity measurement range of the liquid saturation method is 1.0%~10.0%;

The permeability measurement range of the impulse decay method is 1.0 x 10^-5mD~1.0 x 10^-1mD, and the measurement range of the steady state method is 1.0 x 10^-5mD~ 1.0 x 10^2mD, the pressure drop method permeability measurement range is 1.0 x 10^-3mD~1.0 x 10^4mD; the liquid saturation method water saturation measurement The determination range is 1.0%~100.0%, the determination range of water saturation by NMR method is 1.0%~100.0%, and the water saturation by distillation extraction method is 1.0%~100.0%. The measuring range is 1.0%~100.0%.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 23561.3 Determination of physical and mechanical properties of coal and rock Part 3: Determination of density of coal and rock blocks

GB/T 29172-2012 core analysis method

3 Terms and Definitions

The following terms and definitions apply to this document.