GB/T 30501-2022Geological evaluating methods for tight sandstone gas (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 of Standardization Documents" drafted.

This document replaces GB/T 30501-2014 "Tight Sandstone Gas Geological Evaluation Method". Compared with GB/T 30501-2014, except for the structure In addition to adjustments and editorial changes, the main technical changes are as follows.

--- Changed the limit range of gas reservoir classification based on permeability in sandstone reservoirs (see Chapter 4, Chapter 4 of the.2014 edition);

--- Changed the way of classifying gas reservoirs by permeability in sandstone reservoirs (see Chapter 4, Chapter 4 of the.2014 edition).

Introduction

Tight sandstone gas has become one of the important fields of unconventional natural gas exploration and development in the world. my country's tight sandstone gas resources have great potential, which is suitable for In response to the needs of natural gas development in my country, this document is specially formulated to standardize and guide the exploration and development of tight sandstone gas in my country, and to serve as a basis for policy formulation, scientific research Provide the basis for the evaluation of the results. Tight sandstone gas geological evaluation method

1 Scope

This document specifies the content, parameters and methods of tight sandstone gas and geological evaluation.

This document is applicable to the geological evaluation of tight sandstone gas.

2 Normative references

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

GB/T 29172 Core Analysis Method

DZ/T 0217 Specification for calculation of oil and natural gas reserves

SY/T 5440 Technical Specification for Well Testing of Natural Gas Wells

SY/T 5579.2 Reservoir Description Method Part 2: Clastic Reservoirs

SY/T 6285 Oil and Gas Reservoir Evaluation Method

SY/T 6385 Determination method of rock porosity and permeability under overburden

3 Terms and Definitions

The following terms and definitions apply to this document.

4 Classification of sandstone gas reservoirs

The overburden matrix permeability (Kg) index was used to classify the sandstone reservoir gas reservoirs, as shown in Table 1.