Horizontal Well Drilling Technology in Shallow Heavy Oil Recovery in Block Puqian 12 of the Daqing Oilfield

In order to improve the development of heavy oil in the shallow formations of the Daqing Oilfield and to reduce drilling costs, research on horizontal well drilling techniques for recovering heavy oil from shallow formations was carried out.A seven-section constant curvature design method was adopted and the optimum wellbore trajectory was determined.The technical measures during drilling were made.Casing programs and BHAs of different spuds were designed reasonably based on capability analysis through the string and necessary sealing point.These techniques have been applied in 3 wells of Block Puqian 12.Drilling time was reduced by 5 days compared with similar shallow formation heavy oil horizontal wells in the country.The result showed that horizontal well drilling techniques for ultra-shallow heavy oil reservoirs can solve the problems of shallow kick off points, sand running and casing running.This provided some technical measures in improving the development and the recovery rate of shallow heavy oil reservoirs with horizontal wells.