Offshore

Offshore seismic data

A total of approximately 24,500 km of CDP seismic lines have been acquired from 1976 to 1991. Practically all of the Latvian offshore area has been covered by the 2x2 km seismic grid, except the shallowest nearshore areas. Curently seismic data are stored at the Latvian Environment, Geology and Meteorology Agency as original field records in the international SEG-Y format.

These seismic data available to the oil industry for purchase and inspection are listed below.

Note: some of the listed seismic data could be unavailable, because they have been lost or damaged.

List of offshore surveys

Acquisition year	Number of lines	Total length, km	Method	Location
1976	30	1550	CDP	Southern shelf
1977	20	568	CDP	Southern shelf
1978	55	1702	CDP	Southern Central shelf
1979	38	592	CDP	South-western shelf
1980	25	283	CDP	Southern Central shelf
1981	33	687	CDP	Eastern Central shelf
1982	48	1337	CDP	Eastern Central shelf
1983	46	2197	CDP	Central shelf
1984	133	2522	CDP	Central & Southern shelf
1985	32	1862	CDP	Northern shelf
1986	58	2006	CDP	Central & Southern shelf
1987	194	3811	CDP	Northern & Southern shelf
1988	111	2625	CDP	Northern & Central shelf
1989	118	1822	CDP	Western shelf
1991	85	1026	CDP	Southern shelf
2006 *	19	202	2D OBC	Southern Central shelf (E5 and E6 area)

* JSC Kaliningradgeofizika carried out 2D Ocean Bottom Cable (OBC) seismic investigations in the E5 and E6 structure area in August 2006 based on the order of the licensee Odin Energi A/S. Those data will not be available from LEGMC until Autumn 2011, since the owner (Odin Energi A/S) of the data has assigned the status of limited access to the data.

Notes:

	The lines of 1976 and 1977 vintages are of relatively low quality.
	The seismic data (marked in grey on the map) are from the disputed area between Latvia and Lithuania.

The basemap for offshore seismic lines is also enclosed. The scale is 1:100,000. offhore_seismic_baseMap.pdf

Note: some of the seismic lines shown on the map could be unavailable, because they have been lost or damaged.