GB/T 33685-2023Technical specifications for seismic exploration data processing (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 33685-2017 "Technical Regulations for Land Seismic Exploration Data Processing". Compared with GB/T 33685-2017, in addition to structural adjustments and editorial changes, the main technical changes are as follows:

a) Changes related to processing design (see Chapter 6, Chapter 6 of the 2017 edition);

b) The technical requirements for direction correction and rotation of multi-wave (including shear wave and converted wave) seismic data are added (see 7.3);

c) The technical requirements for tide correction and water velocity correction have been added (see 7.4.3);

d) Added ghost reflection suppression processing of water area data, air gun source suppression bubble and zero phase processing, and water and land dual detection seismic data processing Technical requirements such as double detection matching and wave field separation processing (see 7.5.2~7.5.4);

e) Added technical requirements for absorption attenuation compensation (see 7.8);

f) Added technical requirements for multiple wave attenuation (see 7.9);

g) Added technical requirements for residual static correction (see 7.12);

h) Add technical requirements for data interpolation and regularization (see 7.14);

i) Changed the relevant technical requirements for pre-stack time migration, pre-stack depth migration, and migration gather processing (see 7.17~7.19, 2017 Version 7.13, 7.14, 7.16);

j) Changed the technical requirements for post-stack data processing (see 7.20, 7.17, 7.18 of the 2017 edition);

k) Deleted the relevant technical requirements for the section display of the final result of seismic data processing (see 7.19 of the 2017 edition);

l) Changed the content related to the processing results (see Chapter 8, Chapter 9 of the 2017 edition);

m) Changed quality control and outcome evaluation (see Chapter 9, Chapter 8 and 10.2 of the 2017 edition).

1 Scope

This document specifies the basic data collection and inspection, processing design, processing technical requirements, processing results, and quality control of seismic exploration data. The main content and technical requirements of achievement evaluation, achievement acceptance and archiving.

This document applies to surface (including land, transition zone and ocean) seismic exploration data (including compressional waves, shear waves, converted waves) processing and results acceptance.

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 8423.2 Petroleum and Natural Gas Industry Terminology Part 2: Engineering Technology

GB/T 33583 Onshore Petroleum Seismic Exploration Data Acquisition Technical Regulations

GB/T 33683 Technical Specifications for Onshore Petroleum Geophysical Surveying and Positioning

3 Terms and Definitions

The following terms and definitions defined in GB/T 8423.2 apply to this document.