Stratified The Horizontal Well To Water Injection With The Column Supporting Technology Research

Horizontal wells than conventional water injection wells with high injection rate and lower injection pressure,injection sweep efficiency also improved a lot(an average of 10% or more),in favor of a substantial increase oil recovery than vertical wells.When there is an impermeable barrier horizontal wells in the reservoir,using general water injection will only increase the degree of recovery monolayer,while the overall degree of recovery is relatively low,water can not achieve the desired effect.Therefore,Work on sub-horizontal well injection column supporting technology research.First,We detailed research about the status of Shengli Oilfield horizontal waterflooding.Analysis of the basic conditions for sub-horizontal wells and water injection column should have the function.According to the depth of the horizontal well trajectory,We completed analysis stratified water column can not be down into the well,Optimization of 2-3 layerssub-horizontal well injection column total design,Through horizontal well stratified water column structure optimization,packer seals righting center technology research,design and development of column as well as horizontal well test process optimization,deployment and pulling technology research,The initial formation of an effective horizontal well stratified(segment)injection technology,And carried out the indoor simulation experiments dispensing column and matched tools,And in YAA3P2 wells field application.Through laboratory and field experiments showed that,Design of horizontal wells dispensing process can meet the dispensing site needs 2-3 layers,the pressure reaches 30 MPa,temperature 120 ?,Field application effect is more obvious,Tobalanced water distribution,to improve water flooding sweep volume and waterflood efficiency,improve cell recovery and the extent of reserves is important.