In view of the characteristics which has deep zones, low abundance, thin layer, ultra-low permeability, less reservoirs encountered by single well, and low daily production in the Third section of the Shahejie Formation of Fu112 Block, the deviated well technology was studied and application in exploration and development, by the analysis of the economy and technology difficulties. Field application shows that the deviated well technology both applies to Fu112 Block reservoir and may have reference value to the ultra-low permeability reservoir for economic benefit development.