本文選題：耐溫緩凝劑 + 緩凝機理��； 參考：《西南石油大學(xué)》2017年碩士論文

【摘要】：隨著油氣勘探開發(fā)向深層油氣藏的延伸,高溫深井?dāng)?shù)量明顯增多,井底溫度隨井深增加而增加。由于井底溫度較高,深井固井水泥漿常存在稠化時間縮短、沉降穩(wěn)定性變差、水泥漿柱頂部強度發(fā)展緩慢等問題,這不僅影響固井質(zhì)量,還可能使注水泥失敗而導(dǎo)致重大損失。本文基于油井水泥的水化機理和緩凝機理,通過分子結(jié)構(gòu)設(shè)計,合成適用于深井,超深井的耐溫緩凝劑,表征和評價其結(jié)構(gòu)和性能,研究其緩凝機理。本文從耐溫緩凝的角度進行分子結(jié)構(gòu)設(shè)計,以對苯乙烯磺酸鈉(SSS)為主單體,羧酸類單體為主要緩凝副單體,并引入新型具有耐溫緩凝的功能單體,通過自由基水溶液聚合方法合成出兩種耐溫緩凝劑P(對苯乙烯磺酸鈉/衣康酸/不飽和羥基酯)和P(對苯乙烯磺酸鈉/馬來酸/多元環(huán)酰胺烯),并以稠化時間為性能依據(jù),通過控制變量法,正交試驗優(yōu)選合成條件,獲得較佳條件下的合成產(chǎn)物,代號分別為PSIH和LNS-1。對兩種共聚物緩凝劑進行了分子結(jié)構(gòu)和耐熱性能表征及應(yīng)用性能評價。結(jié)合XPS,FTIR,1HNMR三種方法表征了兩種聚合物的元素組成,分子結(jié)構(gòu),官能團組成,表明所有聚合單體參與了反應(yīng),成功合成PSIH和LNS-1兩種耐溫緩凝劑;TG結(jié)果表明兩種聚合物均具有良好的耐溫性能,并結(jié)合聚合物溶液微觀形貌圖進一步說明。綜合應(yīng)用性能說明兩種共聚物緩凝劑的高溫(120～180℃)緩凝效果優(yōu)越,稠化時間與緩凝劑加量間的線性關(guān)系良好;PSIH的特點在于大溫差性能優(yōu)秀,同等加量下高溫稠化時間長、低溫下抗壓強度發(fā)展迅速,適用于大溫差固井;LNS-1的特點在于高溫下沉降穩(wěn)定性良好,可有效防止高溫下水泥漿沉降現(xiàn)象,對提高高溫深井固井質(zhì)量有重要意義。通過TG,XRD和SEM三種手段對比了純水泥漿和加入兩種合成緩凝劑的水泥漿的水化產(chǎn)物組成、含量及微觀形貌,對緩凝劑的緩凝機理進行了初探,共聚物緩凝劑主要通過基團吸附和螯合兩種方式形成聚合物膜阻礙水泥水化進程,起到緩凝效果。
[Abstract]:With the extension of oil and gas exploration and development to deep reservoirs, the number of high temperature deep wells increases obviously, and the bottom hole temperature increases with the increase of well depth. Due to the high bottom hole temperature, deep well cementing slurry often has problems such as shortening thickening time, poor settling stability and slow development of strength at the top of cement slurry column, which not only affects cementing quality, but also may cause cement injection failure and lead to great loss. Based on the hydration mechanism and retarding mechanism of oil well cement, through the molecular structure design, the temperature retarder suitable for deep well and ultra deep well is synthesized, its structure and performance are characterized and evaluated, and its retarding mechanism is studied. In this paper, the molecular structure was designed from the point of view of temperature-resistant retarding. The main monomer was sodium styrene sulfonate (SSS), the carboxylic acid monomer was used as the main retarding sub-monomer, and a new functional monomer with temperature-resistant retarding was introduced. Two kinds of thermostable retarders (sodium p-styrene sulfonate / itaconic acid / unsaturated hydroxyl ester) and P (sodium p-styrene sulfonate / maleic acid / polycyclic amideolene) were synthesized by free radical aqueous solution polymerization. By controlling the variables and selecting the optimum synthetic conditions by orthogonal test, the synthetic products were obtained under better conditions, named PSIH and LNS-1, respectively. The molecular structure and heat resistance of two copolymer retarders were characterized and their application properties were evaluated. The elemental composition, molecular structure and functional group composition of the two polymers were characterized by means of XPS FTIR 1H NMR, indicating that all the polymeric monomers took part in the reaction. PSIH and LNS-1 were successfully synthesized. The results of TG showed that the two kinds of polymers had good temperature resistance, and the results were further illustrated by the micrograph of polymer solution. The comprehensive application properties show that the two copolymer retarders have superior retarding effect at high temperature (120 ~ 180 鈩，

本文編號：1862656