Optimization Research On Adjusting Injection-production System Of Xingbei Development Area In Daqing

Xingbei development area in Daqing oilfield was developed in 1966.Till 2005 composite watercut has been 90.65%.It is in extra water cut exploration period.Recovery degree is high.The used production recovery degree adds up to 81.6%;Casing Damage efficiency is large.From Ninth Five-Year to Tenth Five-Year time annual Casing Damage efficiency both arrives to above 2～3%.During Tenth Five-Year time oilfield reserve-production balance coefficient is only about 0.3.The original bed set doesn't adapt to well pattern injection-production system,which changes seriously.So strengthening injection-production adjustment,improving the injection-production adapting situation among bed set,well pattern and monosandstonebody injection-production.It is important to keep oilfield sustainable development.This article all-round evaluates the injection-production adapting situation Xingbei development area's block.According to every question,the specific adjusting tactics is declared.At first district Xing 1-3 is chosen,where the field test about injection-production perfecting monosandstonebody injection-production relation system comes to operation. The conclusions and results are drawn.The creativity of the results lies in perfecting reasonable oil-water well number ratio calculating method at present watercut.At the first time due to monosandstonebody injection-production perfect coefficient,the evaluation about monosandstonebody injection-production perfect degree changes from qualitative to quantitative;On the other hand,the nine methods of imperfect or perfect sandbody are determined.At last a two-dimensioned quantitative injection-production imperfect sandbody distribution contour maps are formed.As a result,the characteristic of injection-production imperfect sandbody space distribution is clear.The whole rule of perfect monosandstonebody injection-production is determined.The drilling,converted injection,mending and renewing are connected to major repair,which forms harmonic pattern perfect monosandstonebody injection-production system.In ditrict Xing 1-3,many good experiences are afforded for injection-production system reasonable adjustment.