Abstract: According to national strategy of oil and gas development,Sinopec has actively participated in global offshore risk exploration and development,it had successfully completed 5 deepwater wells as operator in JDZ Block of Nigeria,West Africa,the average water depth of the wells is deeper than 1 600 m.The Well Bomu-1 was the first deepwater well drilled by Chinese oil company,the paper took it as an example and presented the key technologies of Sinopec for deepwater drilling and completion,including shallow geological hazard identification and risk assessment,conductor jetting,casing program design and optimization,drilling fluids,cementing,well control and rig selection technique,etc.The successful application of these key technologies had not only promoted the progress of JDZ project,but also improved Chinese deepwater drilling technology,and obtained good economic and social benefits.