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BS EN ISO 19901-8:2023

BS EN ISO 19901-8:2023

$215.11

Oil and gas industries including lower carbon energy. Offshore structures – Marine soil investigations

Published By Publication Date Number of Pages
BSI 2023 166
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This document specifies requirements and provides recommendations and guidelines for marine soil investigations regarding: a)    objectives, planning and execution of marine soil investigations; b)    deployment of investigation equipment; c)    drilling and logging; d)    in situ testing; e)    sampling; f)     laboratory testing; g)    reporting. Although this document focuses on investigations of soil, it also provides guidance, with less detail, for investigations of chalk, calcareous soils, cemented soils and weak rock. Foundation design is not covered by this document. NOTE 1    ISO 19901?4 and the respective design standards covering foundation design for the specific types of offshore structures to meet the requirements of application specific standards are given on the ISO website. The results from marine geophysical investigations are, when available and where appropriate, used for planning, optimization and interpretation of marine soil investigations. This document neither covers the planning, execution and interpretation of marine geophysical investigations nor the planning and scope of geohazard assessment studies, only the corresponding marine soil investigations aspects thereof. NOTE 2    ISO 19901-10 covers the planning, execution and interpretation of marine geophysical investigations. This document specifies requirements and provides guidance for obtaining measured values and derived values. This document excludes requirements for determination of design values and representative values. Limited guidance is provided in 11.3 related to data interpretation. This document is intended for clients, soil investigation contractors, designers, installation contractors, geotechnical laboratories and public and regulatory authorities concerned with marine soil investigations for any type of offshore structures, or geohazard assessment studies.

PDF Catalog

PDF Pages PDF Title
2 undefined
16 4.1 Symbols
21 4.2 Units
22 4.3 Abbreviated terms
24 5.1 Objectives
5.2 Planning
5.2.1 Sequence of activities
26 5.2.2 Integrated geoscience studies
27 5.3 Scope of work and development of project specifications
28 5.4 Health, safety and environmental requirements for marine operations
5.4.1 General
5.4.2 Investigation vessel
29 5.4.3 Hazardous substances and acoustic noise
5.4.4 Shallow gas
30 5.5 Other requirements
5.5.1 Operational requirements
5.5.2 Quality requirements
31 5.5.3 Specific considerations for unconventional soils
6.1 Non-drilling mode deployment
6.2 Drilling mode deployment
6.2.1 General
32 6.2.2 Vessel drilling
6.2.3 Seafloor drilling
6.3 Uncertainty of vertical depth measurements
6.3.1 General
33 6.3.2 Factors affecting the uncertainty of vertical depth measurements
6.3.3 Depth uncertainty classes
34 6.4 Horizontal positioning
6.5 Interaction of investigation equipment with the upper seabed
35 7.1 General
7.2 Project-specific drilling requirements
36 7.3 Drilling objectives and selection of drilling equipment and procedures
7.4 Drilling operations plan
37 7.5 Recording of drilling parameters
7.6 Borehole geophysical logging
7.6.1 General
38 7.6.2 Reporting of results
8.1 General
39 8.2 General requirements for the reporting of in situ tests
40 8.3 Cone penetration test
8.3.1 General
8.3.2 Equipment
41 8.3.3 Test procedures
44 8.3.4 Procedures for testing offshore
46 8.3.5 Presentation of test results
47 8.4 Pore pressure dissipation test
8.4.1 General
48 8.4.2 Equipment
8.4.3 Test procedure
8.4.4 Presentation of results
49 8.5 Ball and T-bar penetration tests
8.5.1 General
51 8.5.2 Equipment
8.5.3 Calibration and verification of ball and T-bar penetrometers
8.5.4 Procedures for testing offshore
52 8.5.5 Presentation of results
53 8.6 Seismic cone penetration test
8.6.1 General
54 8.6.2 Equipment
8.6.3 Procedures for testing offshore
55 8.6.4 Presentation of results
8.7 Other in situ tests
8.7.1 General
56 9.1 Purpose and objectives of sampling
9.2 Sampling systems
9.3 Selection of samplers
9.3.1 General
57 9.3.2 Drilling mode samplers
58 9.3.3 Non-drilling mode samplers
59 9.4 Sample recovery considerations
60 9.5 Handling, transport and storage of samples
9.5.1 General
61 9.5.2 Offshore sample handling
62 9.5.3 Offshore storage
9.5.4 Onshore transport, handling and storage
10.1 General
63 10.2 Project specifications
10.3 Presentation of laboratory test results
64 10.4 Instrumentation, calibration and data acquisition
10.5 Preparation of soil specimens for testing
10.5.1 Minimum sample size and specimen dimensions
10.5.2 Preparation of disturbed samples and soil batching
65 10.5.3 Preparation of intact specimens (fine soils)
10.5.4 Laboratory-prepared compacted and reconstituted specimens
67 10.5.5 Preparation of remoulded samples
10.6 Evaluation of intact sample quality
68 11.1 Reporting requirements
69 11.2 Presentation of field operations and factual data
11.3 Data interpretation and soil parameters

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BS EN ISO 19901-8:2023
$215.11