The Study On Fractured Well Pattern Optimization Of Fuyu Oil Layer In Pu 483 Block

Pu 483 block in putaohua oil field the main body structure and its southern area,plane whole oil,the main oil layer on the longitudinal section in the help,two oil layer,probing geologic reserves of oil in the area of 388.29×104t,belongs to typical low porosity low permeability oilfield,water injection development effect,low single-well production,exploitation and use is difficult.In order to increase the reservoir seepage ability,improve the single well production,Pu 483 block,the author of this paper,the vertical thin layered fracturing technology research large-scale joint network.Comprehensive test Wells,bi nomial production analyzing dynamic analysis results and adjacent area,combining with the experience formula method and the modified theory method,forecast capacity in pt 483 block,the predict Portugal 483 block production intensity is 0.25 t/d,m,on this basis,483 against Portugal block reservoir physical characteristics,combined with the adjacent blocks development experience and theoretical formula,first determine the block reasonable open formation and development of the mining way,after the analysis of degree of sand control,on the basis of well array determines the direction and row spacing distance,and the well pattern adaptability are analyzed,and finally determine the block reasonable well spacing plan: 70 new Wells,drilling,10 of which the first slow drilling 9 members(including conceptual design four horizontal Wells),51 normal Wells,well drainage for nearly east-west direction(NE70 around°),the300 m by 120 m diamond pattern waterflood recovery at nine o 'clock.According to the results of well spacing,preliminary forecast pt 483 block in fuyu reservoir oil producing 24.79×104 t,recovery degree was 7.73%,63.86%,comprehensive water cut in crude oil price is 80 $/ BBL,the after-tax financial internal rate of return is 17.10%,investment payback period is 6.40 years,higher economic benefits,development effect to reach a higher level,and for the development of similar blocks,provide a theoretical basis and practical guidance.