Study On The Distribution And Development Of Remaining Oil And Gas In The Oil Group Of Tahe District

Oil-gas field development is a constantly adjusting process.The quantity and spatial distribution of residual oil and gas is important basis of compiling development and adjustment program. During the petroleum exploration and development, residual oil and gas should be mastered in real time. On this basis,well stimulation can be provided and integral adjustment scheme is recommended.All these to be done are in order to enhanced oil recovery and improve the effect of exploitation.The reservoirs in the middle Triassic in Tahe area is characterized by high porosity and good permeability.It is a small-scale bottom water condensate gas reservoir,with strong anisotropy and normal temperature and pressure system.It was put into development in February2006.After producing test and stable production stage,to December2007, water cut increase rapidly and production decrease. As the production, the density of crude oil increased gradually.At the end of2008,the density of crude oil was up to0.85g/cm".A bottom oil may exist.To February2011,black oil appeared after perforation with heavy artillery.Then it was confirmed by PVT test.In this paper, the oil and gas reserves are calculated in the middle Triassic in Tahe area, and compared it with the result declared in2006.By the method of reservoir engineering, producing energy production performance and water cut of production are analyzed, and then factor effect water cut rising and problems during reservoir development are founded.With numerical simulation methods,residual oil and gas plane and vertical distribution rules are studied.In the end,to the problem in reservoir development and residual oil and gas distribution characteristics, infill wells and potential stimulation candidate wells are adopted.Four infill well plans are present.Compared these oilfield development indexes and the best plan is selected.The best one is F3.And2potential stimulation candidate well are selected. After the implement of comprehensive adjustment,oil recovery degree reached to23.39%,and gas recovery degree reached to23.24%.Compared the result with no well adjustment,the oil recovery degree increased by6.18%and the gas recovery degree increased by3.01%.There are practical guiding significance to similar oil-gas reservoirs.