| Reference | BID900240 |
| Date | 1/10/2011 |
| Location | Africa |
| Scope | The scope of work includes, but is not limited to the provision of Shallow Water Geotechnical and Geophysical Surveys, associated tools and highly qualified specialist personnel. Interested companies must be able to provide the following: The site investigation often includes geophysical and/or geotechnical programs and the size, data density and distribution of the sample/test for each project is designed based on exploration or development objectives, regulatory requirements and expected shallow geologic conditions for each area of interest. A. Phase 1- Geophysical Programs Geophysical programs involve mobilizing vessel(s) capable of acquiring high quality, 2D high resolution seismic, multi-beam bathymetry, side scan sonar and sub-bottom profiler and related data processing and interpretation services. Precision DGPS navigation and positioning systems will be used to interpret shallow drilling hazards and or obtain morphologic and sediment distribution information to assess lateral and vertical variations in soil conditions as a guide for geotechnical sample selection. Preliminary analogue geophysical interpretations will be completed onboard the survey vessel to provide input into geotechnical program design. 2D high resolution seismic data will be processed onshore and interpreted to identify potential drilling hazards. Final reports will map surface and foundation zone geologic conditions to highlight any constraints, hazards or other potential obstructions to facility installation or drilling. B. Phase 2- Geotechnical Program Some projects will require geotechnical surveys which utilize specialized shallow water rotary drilling and other geotechnical equipment. The size, data density and distribution of sample/test sites for jack up rig sites and development platform locations will be project specific and based on the equipment configuration and expected shallow geologic conditions in the area of interest. Geotechnical programs include rotary cores up to 100m below mud line (BML), push and hammer sampling, PCPT and other tests to characterize shallow soils and provide input for foundation engineering and design. Geotechnical tools will be deployed from a geotechnical vessel capable of deploying the required systems in water depths of 10 meters to 100 meters. Core samples analysed at an approved onshore laboratory to determine soil properties which feed into engineering analysis reports. Geotechnical results will be compiled with geophysical interpretations to form a single integrated geoscience evaluation to provide specific soil engineering parameters required to develop final foundation design criteria for each study area. |
