Petroleum and natural gas industries — Specific requirements for offshore structures — Part 10: Marine geophysical investigations

This document provides requirements and guidelines for marine geophysical investigations. It is applicable to operators/end users, contractors and public and regulatory authorities concerned with marine site investigations for offshore structures for petroleum and natural gas industries.

This document provides requirements, specifications, and guidance for:

a) objectives, planning, and quality management;

b) positioning;

c) seafloor mapping, including instrumentation and acquisition parameters, acquisition methods, and deliverables;

d) sub-seafloor mapping, including seismic instrumentation and acquisition parameters, and non-seismic-reflection methods;

e) reporting;

f) data integration, interpretation, and investigation of geohazards.

This document is applicable to investigation of the seafloor and the sub-seafloor, from shallow coastal waters to water depths of 3 000 m and more. It provides guidance for the integration of the results from marine soil investigations and marine geophysical investigations with other relevant datasets.

NOTE 1 The depth of interest for sub-seafloor mapping depends on the objectives of the investigation. For offshore construction, the depths o