RESEARCH ON COMPLETION METHOD OF SIDETRACKING WELL IN DAGANG OILFIELD

In order to decrease the cost of development,excavate remaining oil potentiality of maturing oilfield,enhanced oil recovery,resume the production capacity of abandoned wells with long-term shutdown and inefficient wells and improve economic benefit and so on,side-track drilling technology is a advantage way.Extensional completion method must adapt to reservoir geologic characteristics.In side-track drilling of Dagang oilfield,drilled reservoirs were generally buried shallow,low compaction,and sanding easily while production.The main foundations to choose the completion method were whether the reservoir sanding,well bore stability,a single reservoir or not.According to the specific circumstances of Dagang Oilfield,the paper proposed out the analysis method to determine the completion method and carried out field application in term of the actual situation.