發(fā)布時(shí)間：2018-03-09 03:32

  本文選題：水包油乳化鉆井液　切入點(diǎn)：抗高溫　出處：《西南石油大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：水包油乳化鉆井液作為一種重要的低密度鉆井液體系,對(duì)縫洞發(fā)育的碳酸鹽巖低壓油氣層具有較好的防漏與儲(chǔ)層保護(hù)效果,在現(xiàn)場(chǎng)應(yīng)用較為廣泛。隨著深部地層勘探鉆井技術(shù)需求的不斷加大,對(duì)水包油乳化鉆井液的抗溫能力也提出了更高的要求。本文通過(guò)對(duì)抗高溫乳化劑進(jìn)行研究,優(yōu)選得到了一種符合要求的水包油乳化鉆井液體系。首先,探討了磺基甜菜堿型兩性離子乳化劑的制備方法。通過(guò)一步反應(yīng)法合成了三種不同碳鏈長(zhǎng)度的磺基甜菜堿型兩性離子乳化劑,以單因素法確定了合成磺基甜菜堿的最優(yōu)反應(yīng)條件:1,3-丙磺酸內(nèi)酯與N,N-二甲基烷基叔胺摩爾比1:1.1,反應(yīng)溫度65℃,反應(yīng)時(shí)間3h,溶劑為異丙醇。在最優(yōu)條件下,反應(yīng)完成后叔胺轉(zhuǎn)化率能保持在98%左右,產(chǎn)率為84.7%,以紅外光譜(FT-IR)、核磁共振氫譜(1HNMR)表征了合成的產(chǎn)物即為目標(biāo)結(jié)構(gòu)。其次,對(duì)三種不同碳鏈長(zhǎng)度磺基甜菜堿的水溶液進(jìn)行了表面性能研究。結(jié)果表明200℃ 高溫處理前后臨界膠束濃度分別為 cmc(12C)=5.13×10-3mol/L,cmc(14C)=5.25×10-4mol/L,cmc(16C)=5.50×10-4mol/L,cmc(12C)'=6.31×10-3mol/L,cmc(14C)'=5.62×10-4mol/L,cmc(16C)'=7.24×10-4mol/L,cmc變化較小,說(shuō)明合成的產(chǎn)物在經(jīng)過(guò)高溫環(huán)境后仍能保持一定的表面活性;不同磺基甜菜堿水溶液的動(dòng)態(tài)界面張力在經(jīng)過(guò)一段時(shí)間后會(huì)達(dá)到穩(wěn)定的最低界面張力值,界面張力也會(huì)隨碳鏈長(zhǎng)度的增加而出現(xiàn)下降的趨勢(shì);不同磺基甜菜堿水溶液分別在2.0g/L(12C)、1.0g/L(14C)、3.0g/L(16C)時(shí)達(dá)到對(duì)液體石蠟的最佳乳化效果,其中十二烷基磺基甜菜堿對(duì)液體石蠟的乳化效果最佳;三種磺基甜菜堿起泡性能強(qiáng)弱順序?yàn)?4C12C16C,穩(wěn)泡性能強(qiáng)弱順序?yàn)?4C16C12C。最后,分別對(duì)水包油乳狀液和鉆井液體系進(jìn)行了相關(guān)配方篩選和優(yōu)化,得到了優(yōu)化的水包油乳化鉆井液配方:2%膨潤(rùn)土漿+3%PF-SMP+4%SPNH+0.4%Dristemp+0.4%FA-367+3%Soltex+0.3%NaOH(水相體積)+1%十二烷基磺基甜菜堿+P135(質(zhì)量比3:1)+0.2%有機(jī)硅消泡劑,水、0#柴油體積比5:5。該鉆井液體系性能良好,抗溫能力達(dá)到200℃,且具備一定的抗污染能力(20%水、20%油、2%鹽、15%白云巖鉆屑),能夠滿足深部地層鉆井和地質(zhì)的要求。
[Abstract]:As an important low density drilling fluid system, oil-in-water emulsified drilling fluid has a good leakage prevention and reservoir protection effect for carbonate rock low pressure oil and gas reservoirs developed by fracture and cavity. It is widely used in the field. With the increasing demand of drilling technology for deep formation exploration, higher requirements are put forward for the temperature resistance of oil-in-water emulsified drilling fluid. An oil-in-water emulsified drilling fluid system is obtained by optimal selection. First of all, The preparation method of sulfobetaine amphoteric ion emulsifier was studied. Three kinds of amphoteric emulsifiers with different carbon chain lengths were synthesized by one step reaction. The optimum reaction conditions for the synthesis of sulfobetaine were determined by single factor method. The molar ratio of 1: 1.1, reaction temperature 65 鈩，

本文編號(hào)：1586831