Study On Water Injection Technology Of Chang2Reservoir In Haojiaping Oilfield

Hao Jiaping oilfield is mainly developed in Chang2reservoir in this area, with laterdevelopment comes into the middle, the formation pressure is serious insufficient, small layercomplex changes, high water content, injection production system is not perfect, plane,interlayer, the inner contradiction, complex well conditions, the water cut of oil well increases,the effect of process measures has become worse and worse. Formation pressure of oil wells ofthe recovery is slow, the oil well liquid supply ability is insufficient, that not enough edge andbottom water energy supplement, block natural energy shortage, the region has the potential ofwater flooding development, the reservoir has the edge expansion and well networkimprovement potential.Aiming at the present situation of high input, low efficiency area, difficult development,with fine geological research as the foundation, the system studied in division, stratigraphiccorrelation and small layer structural features, sedimentary background of region, the reservoircharacteristics, the comprehensive analysis and evaluation on water flooding developmentstatus and effect of this region of, targeted to develop the technology of water injection schemefor improving the Hao Jia Ping oilfield development effect.With irregular inverted nine spot injection production well network as the way of wellnetwork deployment, the deployment of injection production well group92, water injectionstrength1-1.5m3/m.d,68.8m3/d.Mpa single well water absorption index, average daily withearly injection25m3; new sewage reinjection water distribution between the2stations,6seat,the laying of the Lord trunk pipeline branch injection54km,345km. After the implementationof the program, is expected to take effect after15years the cumulative oil production1764200tons, sales income of7429000000yuan,3344000000yuan fee production cost, profit after tax1257000000yuan, static investment recovery period is1.2years. For the realization of finewater injection development of the area, improve the recovery rate has important practicalsignificance of crude oil.