Objective
Since the end of 1995, CGG has commercialized the SST500, a borehole seismic tool of up to 12 receiver levels designed to acquire large volumes of 2-D and 3-D well seismic data while minimizing the rig downtime and operational costs. Nowadays, many clients request to extend the operating range of the tool up to 200 deg. C and 1400 bars in line with the new North Sea discoveries. Consequently CGG has completed the design to upgrade the existing tool and thus this project aims at demonstrating the operating capabilities of the HP/HT SST500 tool rated at 200 deg. C and 1400 bars. The demonstration will be carried out in a HP/HT well of a hydrocarbon field operated by ELF Exploration UK.
A prototype satellite tool has been built with the cooling flask necessary to achieve the required temperature capability. Laboratory tests have proved the viability of this technology. However, the size of the high temperature electronics and associated cooling flask precludes its use in the existing SST 500 satellite, and so an alternative satellite design has been adopted for this high temperature project. All mechanicals components of the satellite receivers have been manufactured and final assembly completed. The armoured wireline assemblies for interconnecting the satellites have been built and are currently being load tested. A system has been built to develop and evaluate the electronics prior to final packaging into the down-hole tool. High temperature trials of the critical components have shown them to meet the preliminary temperature requirements. Validation of the detailed design of the electronics is now in the process of completion.
The SST500 is a new borehole seismic receiver tool designed to acquire 2-D and 3-D well seismic surveys while minimizing rig downtime and other equipment immobilization thus cutting the cost of borehole seismic operations. The SST500 is a string of up to 12 levels of receiver sondes that can operate in both open or cased holes. Each receiver sonde is equipped with 3 orthogonal axis geophones and one optional hydrophone. All sondes are simultaneously locked to the borehole wall by an arm actuated hydraulically.
Sensors signals are digitized in each receiver sonde along seismic standards. Downhole data are transmitted in real time to the surface using a high speed telemetry link through the standard 7-conductor logging cable and recorded by a PC-based acquisition system.
The existing tool is rated at 150 deg. C and 1200 bars. CGG has completed the basic design for an HP/HT upgrade up to 200 deg. C and 1400 bars.
The present project is broken dowm in 5 phases :
* Phase 1 : preparation. Detailed drawings and shop drawings and associated tests procedures and specifications. * Phase 2 : manufacturing and purchasing of the sub-assemblies of the prototype tool. Factory tests and pre-commissioning.
* Phase 3 : tool assembly and commissioning tests including a functioning test in a test well.
* Phase 4 : commissioning/demonstration. Mobilization of the necessary equipment. Rig floor commissioning. Demonstration in the HP/HT well. Acquisition with an analog tool. Demobilisation.
* Phase 5 : evaluation of the results and comparison with the analog tool. Management and reporting.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- engineering and technology mechanical engineering vehicle engineering aerospace engineering satellite technology
- natural sciences chemical sciences organic chemistry hydrocarbons
- engineering and technology electrical engineering, electronic engineering, information engineering electronic engineering sensors
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Coordinator
91341 Massy
France
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