COSL is a leading geophysical services provider in offshore China which also plays an important role in the global geophysical services industry. We are a member of the International Association of Geophysical Contractors (IAGC). We own 7 seismic vessels and 4 geotech survey vessels, primarily engaging in seismic and construction survey and seismic data processing. In 2006, Asia¡¯s first six-streamer seismic vessel COSL718 commenced operation. Seismic Services We have a fleet of seven seismic vessels, providing services include seismic analysis and offshore seismic data collection. The vessels are well equipped with modern seismic and navigational equipment and are capable of gathering both two dimensional and three dimensional high resolution seismic data. Our fleet has the capacity to collect up to 400,000 CDP kilometers seismic data per year. We operate a central processing center in Tianjin, a city in the northern China, which has the capacity processing 80,000 kilometers (49,712 miles) of 2-D seismic data and 10,000 square kilometres (3,861 miles) of 3-D seismic data per year. We also established a large database storing seismic data collected from offshore China. |
| 5-year seismic collection activities 5-year seismic data processing activities |

| Orient Pearl | Binhai 511 | Binhai 512 | Binhai 517 | Binhai 518 | Nanhai 502 | COSL 718 |
COSL718, the first six-streamer seismic vessel in China, commenced operation in March 2006 after upgrade and modification. The vessel is equipped with world class professional geophysical devices, having the capacity of reeling several streamers simultaneously and performing self-expanding earthquake focus detection. |
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Survey Services
We own and operate four marine survey vessels to provide marine survey services offshore China and three light-weight drilling rigs to perform onshore geotechnical investigation.![]() |
Our marine survey services include: - seabed topographical surveying |
We perform data analysis at our onshore laboratory and processing center in Tianjin, China.
In addition to offshore China, our survey vessels have worked on regional assignments since 1995 including surveying for ExxonMobil offshore Sakhalin, Russia and for the Korea National Oil Company offshore South Korea.


