弱堿(jian)(jian)三元(yuan)復合驅是采用無機弱堿(jian)(jian)代替強堿(jian)(jian)的(de)(de)復合驅采油技術，與NaOH為堿(jian)(jian)劑(ji)的(de)(de)強堿(jian)(jian)驅油體(ti)系相比，Na2CO3為堿(jian)(jian)劑(ji)的(de)(de)弱堿(jian)(jian)三元(yuan)驅采出液，腐蝕性(xing)小、結垢輕，對油藏傷(shang)害小，克服了強堿(jian)(jian)三元(yuan)復合驅的(de)(de)缺點，目(mu)前在大慶油田已有應用。

弱(ruo)堿(jian)(jian)(jian)(jian)三(san)(san)元復(fu)合(he)(he)驅采出(chu)(chu)液(ye)中(zhong)殘留了相(xiang)當數(shu)量的堿(jian)(jian)(jian)(jian)、表面活性劑和聚合(he)(he)物，油(you)水乳化嚴(yan)重且(qie)多(duo)種乳狀液(ye)并(bing)存，造(zao)成油(you)水分離(li)困(kun)難。弱(ruo)堿(jian)(jian)(jian)(jian)三(san)(san)元驅采出(chu)(chu)液(ye)處理(li)技術的研究對弱(ruo)堿(jian)(jian)(jian)(jian)三(san)(san)元采出(chu)(chu)液(ye)油(you)水分離(li)工(gong)藝及操作(zuo)參(can)數(shu)的選(xuan)擇奠定(ding)了理(li)論基礎，有(you)利于弱(ruo)堿(jian)(jian)(jian)(jian)三(san)(san)元復(fu)合(he)(he)驅在油(you)田中(zhong)的應用(yong)。

本文主要利用了OMEC PIP9.0型顆粒圖像分析儀檢測弱堿三元驅乳狀液乳化程度；動態界面張力儀檢測(ce)(ce)(ce)弱堿(jian)三元采(cai)出(chu)液(ye)油水(shui)界(jie)面動(dong)態界(jie)面張力；DHR-2界(jie)面流變(bian)儀測(ce)(ce)(ce)定弱堿(jian)三元復合(he)驅(qu)采(cai)出(chu)液(ye)界(jie)面強度(du)(du)(du)；ZetaPALS電(dian)(dian)位儀檢測(ce)(ce)(ce)弱堿(jian)三元驅(qu)采(cai)出(chu)液(ye)擴散雙電(dian)(dian)層(ceng)電(dian)(dian)位；BT-9300H型(xing)激光粒(li)(li)度(du)(du)(du)分布(bu)儀測(ce)(ce)(ce)定弱堿(jian)三元復合(he)驅(qu)采(cai)出(chu)污水(shui)中(zhong)懸浮固體粒(li)(li)徑以及(ji)油珠粒(li)(li)徑分布(bu)；多(duo)種不(bu)同破(po)乳(ru)劑(ji)進(jin)行(xing)破(po)乳(ru)脫(tuo)水(shui)實(shi)驗進(jin)行(xing)初步(bu)篩選，再對(dui)脫(tuo)水(shui)效果好(hao)的(de)(de)(de)破(po)乳(ru)劑(ji)進(jin)行(xing)不(bu)同時(shi)間、溫度(du)(du)(du)、濃(nong)度(du)(du)(du)的(de)(de)(de)比較選出(chu)效果最(zui)好(hao)的(de)(de)(de)破(po)乳(ru)劑(ji)；990型(xing)電(dian)(dian)導率(lv)測(ce)(ce)(ce)定儀測(ce)(ce)(ce)定采(cai)出(chu)水(shui)電(dian)(dian)導率(lv)；IJJ-IIB型(xing)原油介(jie)電(dian)(dian)強度(du)(du)(du)自動(dong)測(ce)(ce)(ce)試儀測(ce)(ce)(ce)試取(qu)樣井在(zai)不(bu)同時(shi)期(qi)，不(bu)同化學(xue)劑(ji)含量下(xia)的(de)(de)(de)擊穿場強。

實(shi)驗(yan)發現弱(ruo)(ruo)(ruo)堿(jian)三元復合(he)驅采(cai)出液(ye)乳化嚴(yan)重(zhong)，分(fen)散度(du)高(gao)，乳狀液(ye)穩定內相顆粒平均(jun)粒徑(jing)在6.25μm~7.44μm之間(jian)(jian)，較水(shui)驅采(cai)出液(ye)脫水(shui)難(nan)度(du)大；弱(ruo)(ruo)(ruo)堿(jian)三元采(cai)出液(ye)油水(shui)界面張力一般在0.01mN/m~1.5mN/m之間(jian)(jian)，其中(zhong)絕大多數在0.1mN/m~1mN/m之間(jian)(jian)；弱(ruo)(ruo)(ruo)堿(jian)三元復合(he)驅采(cai)出液(ye)的(de)(de)彈性模量(liang)、粘(zhan)性模量(liang)為n×10-2N/m，界面粘(zhan)度(du)在0.012mPa·s以內；弱(ruo)(ruo)(ruo)堿(jian)三元采(cai)出液(ye)電位絕對值在30mV~50mV之間(jian)(jian)；污(wu)水(shui)中(zhong)懸浮固體粒徑(jing)以及油珠粒徑(jing)隨著溫(wen)度(du)升高(gao)而增大；確定了(le)不(bu)同活性劑(ji)下破乳劑(ji)的(de)(de)選(xuan)擇情況；弱(ruo)(ruo)(ruo)堿(jian)三元復合(he)驅采(cai)出水(shui)電導率(lv)(lv)測試值約在3×103μs/cm~2×104μs/cm之間(jian)(jian)；表活劑(ji)含量(liang)越高(gao)，導電性增強(qiang)，擊(ji)穿場強(qiang)越低(di)；擊(ji)穿場強(qiang)與含水(shui)率(lv)(lv)成反比(bi)，擊(ji)穿場強(qiang)在2.5kV/cm~7.5kV/cm之間(jian)(jian)。