Drilling Technique Research On The Pressure Control In Complex Area Of Jilin Oil Field

There are water loss in Changling area of Jilin oil field,it not only leads to the increasing of drilling time and complex trouble but also pollutes oil&gas.Jilin oil field completed 40 less pressure drilling during 2005 to 2010,but less pressure drilling suffers restrict in development due to technique.MPD is a system of closed drilling fluid circulation.It controls the circulation pressure profilemap exactly and keeps constant bottomhole pressure,it avoids a series of drilling questions because of the stricture drilling fluid safety window and realizes purpose of safe drilling,at last,it can accelerate exploration progress.MPD controls the whole circulation pressure profilemap,it is not the same to anciently control method.Stricture window land drills in relatively low drilling fluid density,it can effectly avoid stream an loss.It can adjust pressure balance in making up single and correct pressure change,stopping land liquid entrance and realizing safety operation.Because of this,in order to realize the regulation to the circulation pressure profilemap exactly,avoiding a series of drilling questions duo to the stricture drilling fluid safety window and realizing less pressure drilling really,we promote the research.By means of research of the project,we judqe adaptability about MPD in complex land of jilin oilfield and complete drilling technique scheme about gas drilling and MPD,at present,we possess locale experiment ability.