ISO INTERNATIONAL STANDARD 19901-8 Second edition 2023-09 Oil and gas industries including lower carbon energy Offshore structures Part 8: Marine soil investigations Industries du pétrole et du gaz y compris les énergies a faible teneur encarboneStructuresenmer Partie 8: Investigations des sols en mer Reference number ISO 19901-8:2023(E) osi IS02023 IS0 19901-8:2023(E) COPYRIGHT PROTECTED DOCUMENT @IS02023 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on or ISo's member body in the country of the requester. ISO copyright office CP 401 · Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland i @ IS0 2023 - All rights reserved IS0 19901-8:2023(E) Contents Page Foreword ..V Introduction. .. vi 1 Scope. 2 Normative references 3 Terms and definitions. 4 Symbols, units and abbreviated terms 4.1 Symbols. .6 4.2 Units.. ..1 4.3 Abbreviated terms. 5 Objectives, planning and requirements. .14 5.1 Objectives .. 14 5.2 Planning.. .14 5.2.1 Sequence of activities. 14 5.2.2 Integrated geoscience studies 16 5.3 Scope of work and development of project specifications. 17 5.4 Health, safety and environmental requirements for marine operations ..18 5.4.1 General ..18 5.4.2 Investigation vessel. ..18 5.4.3 Hazardous substances and acoustic noise 19 5.4.4 Shallow gas.... .. 19 5.5 Other requirements 20 5.5.1 Operational requirements .20 5.5.2 Quality requirements. .20 5.5.3 Specific considerations for unconventional soils 21 6 Deployment of investigation equipment .21 6.1 Non-drilling mode deployment. 21 6.2 Drilling mode deployment 21 6.2.1 General 21 6.2.2 Vessel drilling. 22 6.2.3 Seafloor drilling 22 6.3 Uncertainty of vertical depth measurements. 22 6.3.1 General 22 6.3.2 Factors affecting the uncertainty of vertical depth measurements 23 6.3.3 Depth uncertainty classes... 23 6.4 Horizontal positioning .24 6.5 Interaction of investigation equipment with the upper seabed 24 Drilling and logging. 7 .25 7.1 General 25 7.2 Project-specific drilling requirements 25 7.3 Drilling objectives and selection of drilling equipment and procedures .26 7.4 Drilling operations plan. .26 7.5 Recording of drilling parameters 27 7.6 Borehole geophysical logging 27 7.6.1 General 27 7.6.2 Reporting of results. 28 8 In situ testing .28 8.1 General 28 8.2 General requirements for the reporting of in situ tests 29 8.3 Cone penetration test. .30 8.3.1 General .30 8.3.2 Equipment. 30 IS0 2023 - All rights reserved iii IS0 19901-8:2023(E) 8.3.3 Test procedures 31 8.3.4 Procedures for testing offshore 34 8.3.5 Presentation of test results. 36 8.4 Pore pressure dissipation test. .37 8.4.1 General 37 8.4.2 Equipment 38 8.4.3 Test procedure 38 8.4.4 Presentation of results. 38 8.5 Ball and T-bar penetration tests. 39 8.5.1 General 39 8.5.2 Equipment. 41 8.5.3 Calibration and verification of ball and T-bar penetrometers. 41 8.5.4 Procedures fortesting offshore 41 8.5.5 Presentation of results. 42 8.6 Seismic cone penetration test 43 8.6.1 General 43 8.6.2 Equipment 44 8.6.3 Procedures for testing offshore 44 8.6.4 Presentation of results. 45 8.7 Other in situ tests. 45 8.7.1 General 45 9 Sampling 46 9.1 Purpose and objectives of sampling 46 9.2 Sampling systems 46 9.3 Selection of samplers 46 9.3.1 General 46 9.3.2 Drilling mode samplers. .47 9.3.3 Non-drilling mode samplers 48 9.4 Sample recovery considerations 49 9.5 Handling, transport and storage of samples 50 9.5.1 General 50 9.5.2 Offshore sample handling 51 9.5.3 Offshore storage .52 9.5.4 Onshore transport, handling and storage 52 10 Laboratory testing 52 10.1 General. 52 10.2 Project specifications .53 10.3 Presentation of laboratory test results. 53 10.4 Instrumentation, calibration and data acquisition 54 10.5 Preparati