Waterflood Residual Oil Distribution Law In Shanshan Oilfield

Based on fine reservoir geological model,drawing on new technique theory and method using dynamic survey data analysis,dynamic analysis of reservoir engineering and broad fine reservoir numerical value modeling with dense gridding,this paper has done a general study on residual oil distribution law of Shanshan oil field.On the basis of that,we have determined a leading measure for developing and also carried out deployment study.After studying flood level classification,we have confirmed oil bearing saturation standard with different flood levels.Using reservoir numerical modeling result,planar block subdividing and vertical grading statistics,we have got an accurate and effective understanding of residual oil distribution and its potential so as to settle a strong base for developing and deploying.The factors of impact residual oil distribution is many,they usually are divided into two categories:geological factors and development factors.Geological factors belong to internal factors,development factors belong to external causes.Their combined action causes the current distribution of remaining oil diversification and complicated.There are five categories on genetic type of residual oil on plane:(1) inter-layer interference type;(2) voidage-injection imbalance type;(3) entrapment oil between wells type;(4) poor reservoir type;(5) the remainder of fault bloclk screened.Voidage-injection imbalance type and entrapment oil between wells type are main types.The leading measure for developing residual oil are well pattern thickening,the waterflooding employed degree ofⅡ,Ⅲtype of reservoir is low,well pattem thickening is mainly for EastⅠ,EastⅡ,WestⅠ,WestⅡfour blocks,four programs are on different levels of well pattern thickening.After adjust program four is conducted,we can predict more than 10 years,adjust program four can make oilfield produce crude oil 102.9×10~4m~3 than not adjustting,so adjust program four is the best.