2020-06-03
在蒸汽(qi)輔助重力排水(shui)(SAGD)作(zuo)業中(zhong)(zhong),脫脂(zhi)油(you)(you)回(hui)收至游離水(shui)分(fen)(fen)離器(qi)(FWKO),往往會導(dao)(dao)致(zhi)(zhi)油(you)(you)水(shui)界面水(shui)質(zhi)差和(he)(he)碎屑形成。為了(le)在脫脂(zhi)油(you)(you)回(hui)收的(de)(de)(de)(de)(de)(de)(de)(de)情(qing)況(kuang)下提高(gao)水(shui)質(zhi)和(he)(he)破(po)乳效率,有必(bi)要了(le)解整個過程中(zhong)(zhong)采(cai)出(chu)水(shui)中(zhong)(zhong)的(de)(de)(de)(de)(de)(de)(de)(de)油(you)(you)和(he)(he)固(gu)體(ti)(ti)的(de)(de)(de)(de)(de)(de)(de)(de)狀(zhuang)態。本文研(yan)究(jiu)了(le)脫脂(zhi)油(you)(you)對SAGD操作(zuo)中(zhong)(zhong)水(shui)/油(you)(you)分(fen)(fen)離的(de)(de)(de)(de)(de)(de)(de)(de)影響。采(cai)用(yong)(yong)動流(liu)式顆(ke)粒(li)成像(xiang)(DOFI)技術,對SAGD工藝從(cong)不同容(rong)器(qi)中(zhong)(zhong)收集的(de)(de)(de)(de)(de)(de)(de)(de)采(cai)出(chu)水(shui)中(zhong)(zhong)的(de)(de)(de)(de)(de)(de)(de)(de)油(you)(you)和(he)(he)固(gu)體(ti)(ti)濃度、油(you)(you)滴(di)(di)大(da)小(xiao)以及(ji)相(xiang)關的(de)(de)(de)(de)(de)(de)(de)(de)粒(li)徑分(fen)(fen)布進行了(le)表(biao)(biao)征。DOFI分(fen)(fen)析表(biao)(biao)明(ming),脫脂(zhi)油(you)(you)的(de)(de)(de)(de)(de)(de)(de)(de)再循(xun)環導(dao)(dao)致(zhi)(zhi)更(geng)多(duo)的(de)(de)(de)(de)(de)(de)(de)(de)油(you)(you)和(he)(he)固(gu)體(ti)(ti)被輸送到FWKO、處(chu)理器(qi)和(he)(he)誘導(dao)(dao)氣(qi)浮(IGF)出(chu)口水(shui)域,終進入去油(you)(you)過濾器(qi)(ORF)。水(shui)中(zhong)(zhong)含油(you)(you)量的(de)(de)(de)(de)(de)(de)(de)(de)增加(jia)導(dao)(dao)致(zhi)(zhi)油(you)(you)滴(di)(di)增多(duo),尤其(qi)是在采(cai)出(chu)水(shui)中(zhong)(zhong)殘留的(de)(de)(de)(de)(de)(de)(de)(de)小(xiao)油(you)(you)滴(di)(di)增多(duo)。這些小(xiao)油(you)(you)滴(di)(di)比(bi)大(da)油(you)(you)滴(di)(di)更(geng)難去除,導(dao)(dao)致(zhi)(zhi)水(shui)質(zhi)惡化(hua)。脫脂(zhi)油(you)(you)的(de)(de)(de)(de)(de)(de)(de)(de)循(xun)環利用(yong)(yong)降低了(le)IGF容(rong)器(qi)的(de)(de)(de)(de)(de)(de)(de)(de)除油(you)(you)效率,增加(jia)了(le)ORF過濾器(qi)受油(you)(you)和(he)(he)固(gu)體(ti)(ti)顆(ke)粒(li)的(de)(de)(de)(de)(de)(de)(de)(de)污染。破(po)乳研(yan)究(jiu)表(biao)(biao)明(ming),采(cai)用(yong)(yong)雙(shuang)反乳化(hua)破(po)乳劑可以改善水(shui)質(zhi),減輕添加(jia)脫脂(zhi)油(you)(you)后的(de)(de)(de)(de)(de)(de)(de)(de)固(gu)體(ti)(ti)對水(shui)質(zhi)的(de)(de)(de)(de)(de)(de)(de)(de)負面影響。
W/O/W emulsion in SAGD operation. Oil droplets containing small inner water droplets, along with single oil droplets, are dispersed in the external water phase.
結論:脫脂(zhi)油(you)(you)(you)(you)回收(shou)到(dao)富油(you)(you)(you)(you)高含油(you)(you)(you)(you)污水(shui)處理系統,導(dao)致水(shui)質(zhi)(zhi)差,在水(shui)/油(you)(you)(you)(you)界面形成破布。對(dui)SAGD工藝中(zhong)(zhong)各容(rong)器(qi)采(cai)(cai)出的(de)采(cai)(cai)出水(shui)進行動態光(guang)學流體成像分(fen)析,結(jie)果表(biao)明:脫脂(zhi)油(you)(you)(you)(you)回用(yong)(yong)導(dao)致更(geng)多的(de)油(you)(you)(you)(you)和(he)(he)固體被輸送(song)到(dao)FWKO、treater和(he)(he)IGF出水(shui),終輸送(song)到(dao)ORF。在水(shui)中(zhong)(zhong)增加的(de)油(you)(you)(you)(you)導(dao)致更(geng)多的(de)小油(you)(you)(you)(you)滴留(liu)在產出水(shui)中(zhong)(zhong),這(zhe)比較大的(de)油(you)(you)(you)(you)滴更(geng)難去除。脫脂(zhi)油(you)(you)(you)(you)回收(shou)降低(di)了IGF容(rong)器(qi)的(de)除油(you)(you)(you)(you)效(xiao)率,增加了ORF過濾器(qi)的(de)結(jie)垢。FWKO、IGF和(he)(he)ORF的(de)水(shui)樣經脫脂(zhi)油(you)(you)(you)(you)循環后懸浮物的(de)紅外(wai)光(guang)譜(pu)分(fen)析表(biao)明,這(zhe)些(xie)固體為(wei)包覆瀝(li)青的(de)細石英和(he)(he)粘土(tu)。破乳研究表(biao)明,采(cai)(cai)用(yong)(yong)雙反相破乳劑可以改善水(shui)質(zhi)(zhi),減(jian)輕(qing)除油(you)(you)(you)(you)過程(cheng)中(zhong)(zhong)引入的(de)固體顆(ke)粒對(dui)水(shui)質(zhi)(zhi)的(de)負面影響(xiang)。
Effect of 3% skim oil addition on BS&W of top oil. In all tests, 500 ppm DMO6000, 60 ppm RBW7000 and 5–15 ppm RE3300RBW were applied. Control tests were run with no RE3300RBW application in the absence and presence of skim oil addition for comparison.
FlowCam——流式顆粒成像分析儀可(ke)以有效幫(bang)助用戶找(zhao)到樣品中的(de)透(tou)(tou)明(ming),半(ban)透(tou)(tou)明(ming)或(huo)者不透(tou)(tou)明(ming)顆粒(li),并且通(tong)過顆粒(li)的(de)形(xing)態(tai)特征自動將顆粒(li)進行分類(油滴或(huo)者固體(ti)顆粒(li)),并進行精(jing)確(que)量(liang)化,從而獲(huo)得具(ju)有統計意義的(de)數據。并且可(ke)以獲(huo)得每個(ge)顆粒(li)的(de)形(xing)態(tai)參數,以保證數據解讀(du)的(de)準(zhun)確(que)性。