DUBAI, Oct 31 (Reuters) - The emirate of Sharjah, one of the United Arab Emirates, will conduct a 3D seismic onshore survey of about 500 sq km (195 sq miles) of its territory in search of deep oil and gas reservoirs, Sharjah National Oil Corp said on Monday.

Most of the area has not previously been covered by 3D seismic surveys, Sharjah National Oil Corp said in a statement, adding that the survey is expected to be completed by the end of December.

Oil was discovered in Sharjah in the 1960s and commercial production began in 1974. Production increased with the discovery of two fields in 1980 and 1982.

(Reporting by Andrew Torchia; Editing by David Goodman) ((andrew.torchia@thomsonreuters.com; +9715 6681 7277; Reuters Messaging: andrew.torchia.thomsonreuters.com@reuters.net))