水下聲學定位是用水聲設備確定水下載體或設備的方位、距離的技術。根據從構成基陣的三個以上聲應答器接收到的聲脈沖信號到達時間或相位進行定位。
聲學定位技術的發展速度非?？?，其應用也越來越廣泛，當前大多海洋工程，如海洋油氣開發、深海礦藏資源調查以及海底光纜管線路由調查與維護等，需要聲學定位系統對水下拖體進行導航定位，如水下遙控機器人、水下無人機器人、水下自動機器人、聲吶設備的水下拖魚等。
Sercel公司近期推出了用于地震采集的GeoTag海底聲學定位系統，該系統可精確定位水下500米的各類海底電纜、海底節點以及過渡區電纜系統。
GeoTag海底定位系統具有高度的靈活性和可靠性，具有自身獨特設計，可進行快速維護，如更換電池等，可提高作業效率。
通過GeoTag海底聲學定位系統，Sercel公司可向客戶提供行業領先的完整海底地震探測采集方案。該系統易于應用，從小型到大型，GeoTag可在作業人員部署的數以萬計的聲學定位裝置中自如工作。石油圈原創www.h29736.cn
Sercel公司的CEO Pascal Rouiller說：“基于我們被廣大用戶認可的聲學定位產品經驗，GeoTag應運而生。它能夠滿足海底地震設備對精確定位的要求，尤其是對4D業務的需求?！?/span>
GeoTag是目前市場上體積最小的聲學應答器，它可以儲存在絞盤上并通過排纜器鋪設，因此操作靈活并且低成本高效益。
GeoTag受益于Sercel專業的聲學技術，從而為聲學定位需要提供值得信賴的解決方案。
特性 & 優點
- 靈活的操作石油圈原創www.h29736.cn
??—市場上最小的應答器以及簡單的電池更換操作；
- 可靠的性能
??—經過sercel驗證的聲學技術，定位精確至0.2米；
- 廣范圍的勘測石油圈原創www.h29736.cn
- OBC,TZ, 以及海底節點；
- 淺灘和深水勘測：深至500米；
- 適合從小至大的勘探隊（從1到10,000個單元）。
GeoTag體積小且重量輕，是一個通過測量其與水面應答器之間的距離而精確測量位于海底地震接收器位置的聲學應答器。GeoTag特殊的設計允許其能夠容易的被安裝在任何地震采集電纜和節點上：
- 工作深度至500米；
- 長時間的電池壽命（可工作6個月）；
- 通過聲學設置和測試；石油圈原創www.h29736.cn
- 多至10,000個唯一ID。
收發器
在船上的GeoTag收發器與位于海底的GeoTag呼應。GeoTag收發器通過接線盒連接導航系統。
PTE石油圈原創www.h29736.cn
GeoTag設置和測試設備是一個通過鋰離子電池供電的自治設備。他被用來在鋪設應答器前對其地址設置。它也可在保養時運行快速質量測試。通過聲學連接到應答器，測試結果可以下載到電腦用以之后的檢查和保養跟蹤。
- 唯一的ID設置；
- 電池檢查；
- 聲學遙感測試。石油圈原創www.h29736.cn
水聲定位系統在鉆井船和浮式平臺等海洋工程裝備中得到廣泛應用，比如南海油氣田的開發，主要用于對海底電纜操作指導以及海底電纜定位。
今后，隨著計算機技術、電子技術、信號處理技術、機械工藝以及測量等技術的發展，聲學定位的定位精度會不斷提高，在油氣開發等作業中的應用也將越來越廣泛。
小編手中還握有GeoTag和Sercel公司其他產品的更多資料哦，想獲??？很簡單：請將此文章分享至朋友圈，發送截圖和郵箱地址至石油圈微信后臺。小編會將資料打包奉上，發送至您的郵箱！還有機會與技術專家溝通交流哦~
來自/Sercel ? 編譯/Leia
Sercel announced today the launch of GeoTag, the acoustic positioning solution of choice for seabed seismic acquisition. GeoTag can be used to accurately position all types of Ocean Bottom Cable (OBC), Ocean Bottom Node and Transition Zone cable systems for seabed seismic surveys in water depths down to 500 meters.
The highly flexible and reliable GeoTag solution operates with the smallest acoustic positioning transponder available on the market. The transponders are attached to the seabed seismic equipment and interrogated by a vessel-based trans-ceiver. GeoTag’s unique design allows for rapid maintenance such as battery replacement for improved crew efficiency. The transponders can also be stored on a reel and deployed mechanically when used with OBC systems, for seamless and cost-effective operations.
With the addition of GeoTag’s acoustic positioning capability, Sercel now offers a complete, state-of-the-art acquisition solu?tion for a wide range of seabed seismic surveys. GeoTag is fully scalable for use on small to large seabed crews deploying up to 10,000 acoustic positioning devices.
Pascal Rouiller, Sercel CEO, said: “This new product capitalizes on our proven experience in acoustic positioning. It answers the need in the industry for more accurate positioning of seabed seismic equipment, particularly for 4D operations.”
GeoTag is the new acoustic positioning system from Sercel designed to work with any ocean bottom or transition zone seismic equipment down to 500 meters deep. GeoTag is the smallest acoustic transponder on the market, allowing flexible and cost effective operations due to its ability to be stored on a reel and deployed by mechanical squirter.
GeoTag benefits from Sercel’s expertise in advanced acoustic technologies to provide a reliable state of the art turnkey solution for your acoustic positioning needs.
Features & Benefits
- FLEXIBLE OPERATIONS
?—Smallest transponder on the market
- Simplified battery replacement
?—RELIABLE PERFORMANCE
- Sercel proven acoustic technology
- Accurate positioning : 0.2 m typical
- WIDE RANGE OF SURVEYS
- OBC, TZ, and ocean bottom nodes
- Shallow and deep surveys : Down to 500 m
- Scalable from small to large crews (1 to 10,000 units)
Equipment
GeoTag
The small and lightweight GeoTag is an acoustic transponder enabling accurate positioning measurement of seismic receivers on the seabed by measuring ranges from the surface transceiver. Its specific design allows easy installation on any seismic cable or node.
- Operational down to 500 m;
- Long battery life (6 month operation);
- Programming and testing by acoustic;
- Up to 10,000 unique IDs.
Transceiver
The GeoTag transceiver on the vessel interrogates the GeoTag transponders located on the seafloor. The Geotag transceiver is connected to the navigation system through a junction box.
- Up to 10 simultaneous replies;
- Connection to navigation system.
PTE
The GeoTag Programming and Test Equipment is an autonomous device powered by a Li-Ion battery. It is used to program the addresses of the transponders before deployment.
It can also be used to run quick QC tests for maintenance purposes. The connection to the transponder is via acoustic and the results can be downloaded to a PC for subsequent checks and maintenance tracking.
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