本文選題：無固相　切入點(diǎn)：鉆井液　出處：《西南石油大學(xué)》2015年碩士論文

【摘要】：無固相鉆井液是由可溶性鹽與聚合物增粘劑等組成的無粘土相的鉆井液,它能夠避免因粘土礦物等固相在篩管完井中對(duì)固井質(zhì)量的影響及儲(chǔ)層的損害。增粘劑是無固相鉆井液中重要的組成部分,它是維持鉆井液懸浮和攜帶巖屑性能的根本保障。本文主要研制一種高效增粘、耐溫耐鹽的增粘劑,并研制密度可調(diào)的甲酸鉀無固相鉆井液體系。 通過對(duì)目標(biāo)產(chǎn)物分子的結(jié)構(gòu)設(shè)計(jì)、單體的選擇以及合成可行性分析,確定以非離子單體丙烯酰胺(AM)、陰離子單體2-丙烯酰胺基-2-甲基丙磺酸(AMPS)以及陽離子單體甲基丙烯酰氧乙基三甲基氯化銨(DMC)為合成單體,在過硫酸銨與亞硫酸氫鈉氧化-還原引發(fā)體系下進(jìn)行水溶液聚合,合成三元共聚物(PADA)。通過單因素法對(duì)產(chǎn)物的表觀粘度與特性粘度的測(cè)定,確定最佳的反應(yīng)合成條件：引發(fā)劑過硫酸銨與亞硫酸氫鈉質(zhì)量比為2：1,單體質(zhì)量配比為AM:AMPS:DMC=8:2:1,單體質(zhì)量總濃度為30%,引發(fā)體系加量為單體總質(zhì)量的0.5%,體系pH為7,反應(yīng)溫度45℃,反應(yīng)時(shí)間4h。對(duì)PADA結(jié)構(gòu)進(jìn)行紅外光譜、核磁共振氫譜表征,對(duì)PADA溶液的流變性能進(jìn)行了評(píng)價(jià)。 通過對(duì)加入PADA增粘劑的無固相鉆井液中加重劑、提切劑、暫堵劑、降濾失劑、頁巖抑制劑以及潤(rùn)滑劑的篩選與優(yōu)化,確定了甲酸鉀無固相鉆井液的配方體系：清水+10%～50%甲酸鉀(密度范圍：1.05g/cm3-1.32g/cm3)+0.45%PADA+0.3%XC(提切劑)+3.5%超細(xì)碳酸鈣+2%JX-JL(降濾失劑)+1.5%HLB(潤(rùn)滑劑)+2%JX-YZ(抑制劑)。對(duì)研制的甲酸鉀鉆井液進(jìn)行評(píng)價(jià),室內(nèi)試驗(yàn)表明：甲酸鉀鉆井液的表觀粘度適中,體系動(dòng)切力與塑性粘度較高,濾失量小(FLAPI=4.8mL, FLHTHP=11.8mL),耐溫能力達(dá)120℃,抗鹽抗鈣污染能力強(qiáng),抗固相污染能力強(qiáng),潤(rùn)滑性能好,極壓潤(rùn)滑系數(shù)0.075,頁巖滾動(dòng)回收率達(dá)90%以上,能夠?qū)崿F(xiàn)油氣儲(chǔ)層保護(hù)。 通過對(duì)甲酸鉀無固相鉆井液破膠體系研究,確定破膠體系配方：KCl混合鹽水+4%破膠劑JX-GB+2%粘土穩(wěn)定劑HCS。
[Abstract]:Solid-free drilling fluid is a non-clay phase drilling fluid consisting of soluble salt and polymer tackifier. It can avoid the influence of clay minerals and other solids on cementing quality and reservoir damage in sieve tube completion, and tackifier is an important part of solids free drilling fluid. It is the fundamental guarantee to maintain the properties of drilling fluid suspension and cuttings carrying. In this paper, a kind of viscosity improver with high viscosity, temperature and salt resistance, and a solid free drilling fluid system with adjustable density are developed. Based on the structural design of the target product molecule, the selection of monomer and the feasibility analysis of synthesis, The synthetic monomers were composed of non-ionic monomer acrylamide, anionic monomer 2-acrylamido-2-methylpropanesulfonic acid (AMPS) and cationic monomer methacryloxy ethyl trimethylammonium chloride (DMCs). The terpolymer was synthesized by aqueous solution polymerization in the system of ammonium persulfate and sodium bisulfite redox initiator. The apparent viscosity and intrinsic viscosity of the product were determined by single factor method. The optimum reaction conditions were determined as follows: the mass ratio of ammonium persulfate to sodium bisulfite was 2: 1, the mass ratio of monomer to ammonium persulfate was 2: 1, the mass ratio of monomer to ammonium persulfate was 8: 2: 1, the mass concentration of monomer was 30%, the amount of initiator was 0.5% of the total mass of monomer, the pH of the system was 7, the reaction temperature was 45 鈩，

本文編號(hào)：1683728