Study On The Comprehensive Research Of Mideng Oilfield Development

The three old oilfield in Tuha basin,including Shanshan and Wenmi,Qiuling oilfield,belong to low porosity,low permeability and low viscosity typical,"three low" reservoir,oil well water cut rises quickly.At the beginning of operation,take fracturing production,through rapid construction,high speed stable production period,quickly entered the high decline period.At present,the three old oilfields have entered the high water cut development period of low speed.Mideng oilfield is located in the northwest of Wenmi oilfield,in braided river delta depositional end,reservoir and oil saturation of oil in the whole of Wenmi is the worst.At present,the oilfield has high water cut,low oil production rate and low Degree of recovery.How to improve the oilfield development effect and improve oil production rate and recovery rate,it is necessary to carry out targeted research and formulate effective control measures.This paper analyses and studies the status of waterflooding Mideng oilfield,due from the large injectorproducer distance,water flooding control degree is low,the low utilization rate of oil reserves,The injection production well network of the oilfield is poor in adaptability,Water flooding condition is poor.On the basis of fine contrast of the subzone,single sand body characterization,layering injection production quantification are obtained,floodresponse and water breakthrough analysis,The present situation of stratified injection production is analyzed,and the driving edge of injected water is quantitatively depicted,The distribution characteristics of remaining oil in oilfield are analyzed: In the plane,The distribution of remaining oil is dominated by well pattern uncontrollable type and thin differential layer type;in the vertical,is dominated by the lower recovery of the above oil measures,and the top of the positive rhythm of intraformational.According to the distribution characteristics of remaining oil in oilfield,The development strategy of tapping the remaining oil with a single sand body as a unit.In accordance with the principle of "well pattern adjustment mainly,supplemented by tapping potentials",the comprehensive control measures for oilfield development are formulated,15 infill adjustment wells are deployed,oil and water measures are taken 34 wells,16 wells are converted,and injection production well pattern is perfected.Through the implementation of the countermeasures,it can achieve the purpose of improving oil field development effect and improving oil recovery.It is expected that oil recovery will be enhanced by 5%.