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1、石油學(xué)報(石油加工)2Ol4年8月ACTAPETROLEISINICA(PETROLEUMPROCESSINGSECTION)第3O卷第4期文章編號:10018719(2014)04-0724—06聚胺抑制劑和蒙脫土的作用機理魯嬌,方向晨,黎元生,尹澤群,張喜文(中國石化撫順石油化工研究院,遼寧撫順113001)摘要:采用x射線衍射(XRD)、掃描電鏡(SEM)、紅外光譜(IR)考察了由開環(huán)聚合反應(yīng)制備的聚胺處理前后蒙脫土的層間距、官能團及表面形態(tài)的變化,初步確定了聚胺抑制劑和蒙脫土的作用機理。結(jié)果表明,聚胺運動黏度為305~1940mm。/s、陽離子度為2.235~4.426mmol/g時
2、,可實現(xiàn)對蒙脫土的有效束縛,可將其層間距由1.572ilm縮至1.361~1.413nIYl范圍內(nèi);在上述聚胺物性參數(shù)范圍內(nèi),蒙脫土層間距與聚胺的運動黏度關(guān)系不大,與聚胺的陽離子度關(guān)系極為密切,陽離子度越大,層間距越大。聚胺能夠運移至地層發(fā)生作用,通過靜電引力、氫鍵作用、錨固作用以及疏水作用等實現(xiàn)對黏土的有效束縛,從而起到良好的井壁穩(wěn)定效果。關(guān)鍵詞:聚胺;頁巖抑制劑;層間距;微觀形態(tài);作用機理中圖分類號:TE254文獻標(biāo)識碼:Adoi:10.3969/j.issn.1001—87i9.2014.04.023MechanismoftheInteractionBetweenPolyamineIn
3、hibitorandMontmorilloniteLUJiao,F(xiàn)ANGXiangchen,LIYuansheng,YINZequn,ZHANGXiwen(FushunResearchInstituteofPetroleumandPetrochemicals,SINOPEC,F(xiàn)ushun113001,China)Abstract:ByusingX~raydiffraction(XRD),scanningelectronmicroscope(SEM)andinfraredspectroscopy(IR),thelatticespacing,functionalgroupandsurfacemo
4、rphologychangesofmontmorillonitepreandposttreatmentbypolyaminepreparedbyring—openingpolymerizationwereinvestigated.Basedontheaboveinvestigation,theshaleinhibitionmechanismWasidentifiedpreliminarily.Resultsshowedthat,whenkineticviscosityofthepolyamineshaleinhibitorwasintherangeof305to1940mm/sandcati
5、onicdegreewasintherangeof2.235to4.426rnmol/g,montmorillonitecouldbeeffectivelyboundedupwiththelatticespacing?educedfrom1.572nmtotherangeof1.361—1.413nm.Withtheadditionofpolyamineshaleinhibitorofabovephysicalparameters,thelatticespacingofmontmorillonitehaslittlerelationwithkineticviscosityofpolyamin
6、e,butwasgreatlydependentoncationicdegreeofpolyamine.Thehigherthecationicdegreeofpolyamine,thehigherthelatticespacingofmontmorillonite.Owingtotheelectrostaticinteraction,hydrogenbonding,anchoringeffectandhydrophobiceffect,polyaminecouldmigratetotheearthformationtokeepexcellentboreholestability.Keywo
7、rds:polyamine;shaleinhibitor;latticespacing;micromorphology;mechanism隨著油氣勘探領(lǐng)域的發(fā)展,深井、超深井、海井難度,并對鉆井液體系特別是頁巖抑制劑提出了洋井及復(fù)雜地段井的出現(xiàn),在鉆探過程中鉆遇泥頁更高的要求。常用的鉆井液用頁巖抑制劑主要有聚巖地層時,泥頁巖的水化膨脹、分散將導(dǎo)致井壁失合物類、無機鹽類、瀝青類引、腐植酸類Ⅲ等。穩(wěn)、鉆頭泥包、井