Development And Evaluation Of The Lignin, Polyacrylamide Profile Control Agent

"The species and ＂sillg conditions ofprofile－modifying agent is comprehended in thispaPer． On tills foundation,tile profile－modifying 明entofPolycryamides－lignocellulose is studyedalld evaluated．The room exPerimentshowstllat:tile optimal prescription of profile－l。lodifying agent is that:(l)tile syllthesis ofPS base solution is that ti。e optimal concentratiol。of Polycryalnides(PAM)solution is 0．6O and the optimal mass ratio ofCa－hgnocellulose(Ca－LS)is．3％；(2)the prescription of profile－modifying agent is that the PS base solution is diluted witll times,the mass ratio of potassiulll dicliromate and tlliourea is 0·6％and 0．4％,respectively．In this prescription,the gel yi。cosity of profile－modifying agellt exceeds 100000 nlPa．s,the crosslil出inptime varies ill tile ranpe of20～60h．Tile corn experimellt sllowsthatthepluppingratio exceeds99％andthebreaktliroughpresswe exceeds 0．SMg缸cm．The corll mini－photograph shows that the gel plug ti。e big hole way of corn,tile i中ection water revolve tile plugging region and form the new hole way,ti。e radiation coefficient of＊thecient iniection water isimproved．The experimellt ofoil ield sllowthatthe adsorptiondissect SUffaCC Of illjCCtioll WdtCf WCll is illlpfOVCd lliCf thC CllCllliC81 profile－modify．The crude oil thatproduce flom well which connect with the i中ection well increases．The chemical profile－l。。odify in one close reyion shows that hle number and thic讪ess of＊the hisll absorPtion layer ． decrease and the number alld thickness of＊theess low absorPtion layer improve．Tile decreasingratc ofvolume ofoil productioll ill close region ！！and the water rising rate are lightened. The results of exploitation in closeregion is improved.