Research On The Improvement Of The Transition Zone In The Eastern Part Of Saertu Oilfield

In Sanan Development Area in East and West wings of oil-water transition zone development area accounting for 33.4% of the whole in Sanan Development Area, geological reserves accounted for 16.65% of whole in Sanan Development Area. 1966 began with 300 ~400 meters of different injection production well spacing in four spot pattern in the development of open, Caisa, Pu reservoir. At present, a large area of the transition zone with a large area of the encryption and adjustment of the local area of the two encryption adjustment,comprehensive management, injection production well spacing of 125 ~ 175 meters.Because in Sanan Development Area transition belt is located in Saertu Anticline of East and West wings. By storage layer deposition, reservoir buried depth, compaction effect and reservoir development, porosity and permeability characteristics, fluid property, formation pressure and so on have not in the pure oil zone. Relatively pure oil and water cut of the block high 1.93%, recovery degree, oil production rate were low 15.93 and 0.74 percentage points; washed inside the thick oil layer is not uniform, thin and poor reservoir multi-directional water flooding the low degree of control; inefficient wells and long-time shut in wells high proportion, work well pattern density is low, some wells and injection production relationship needs further improvement. In order to improve the development effect of the block, in Sadong transition with 300 m area in open field test area, through the study of this subject, understand extra high water cut period preceding with potential of remaining oil, formed a perfect matching development technology, actively explore ways of improving the transition with the development effect of the effective way.