Status and Proposal of the Sinopec Ultra-Deep Drilling Technology

In order to promote the progress of ultra-deep well drilling technology,speed up the exploration and development of oil and gas in deep reservoir,based on the statistics and analysis of drilling data,this article introduced some advanced technologies that used in ultra-deep wells,including gas drilling technology,composite drilling technology of PDC bit with PDM,impregnated diamond bit with turbodrill,PDC bit with torsional percussion tools,high pressure jet drilling with 35 MPa,automatic vertical drilling system,etc.The paper also analyzed the technical status of ultra-deep wells drilled in three main oil fields of Sinopec as Puguang Gas Field,Yuanba Gas Field and Tahe Oilfield,the average drilling depth in Puguang was 5999.00m,average drilling cycle time was 232.06 days,the average well depth in Yuanba was 7 049.67 m,average drilling cycle time was 439.47 days,average well depth in Tahe was 6 441.80 m,average drilling cycle time was 102.85 days.The analysis showed that the Sinopec ultra-deep drilling technology has been first-class now in the world,but it has some something to do for catching up the advanced technology as that in developed countries in the world.In the end,some thinking and suggestions for ultra-deep drilling technology were proposed in the paper.