Research Of Injection Wells Deep Profile Technology In Xifeng Oilfield

Injection Well deep profile control has important means for heterogeneous reservoir watercontrol and oil stabilization. The vast majority of oil field in our country has entered the highwater cut or extra high water-cut period, the conventional plugging technology has beenunable to meet the needs of oilfield production, research and application of deep profilecontrol technology has made many new advances, which has obtained remarkableachievements in improving water flooding effect.Xifeng oilfield belongs to low yield, low permeability and low pressure reservoir,hasmany blocks. permeability in Each block at plane, vertical distribution, which cause theinjected water or edge and bottom water flood along with a high permeability zone, big pore,crack fingering or cone into the well, made production wells meet water early, and soonflooded, then reduces the oil recovery rate. In order to prevent the situation, improve theproducing degree of water flooding and oil recovery, study the adapt water plugging andprofile control technology, meet the needs of plugging large pore path, displacing residual oilin small pore peeling, so as to raise water flooding efficiency in middle-high water cut period,finally achieving to enhance the oil recovery.In this paper, We uses a combination of tracer analysis, pulse testing, PI decision andwater flooding test, research and analyze the of type, direction of water and flow level,optimized and evaluated the plugging agent for Triassic fractured reservoir, Finally putforward water plugging and profile control scheme optimizationFrom the results of field application, After profile control, a total of68oil wells hasimproving, increasing36.9t oil one day. Comprehensive water content falls8.4t. The actualcompletion of20, obvious effect. At the same time profile has improved, absorbent of somewells spikes is apparently abate, absorbent layer has moved. Through analyze the data ofabsorbent profile which can be contrasted, Finally available water thickness has increased7.9m.