本文選題：稠化劑 + 二氧化碳泡沫壓裂液��； 參考：《西南石油大學(xué)》2017年碩士論文

【摘要】：隨著我國對(duì)低滲透油氣藏,特別是水敏、水鎖、裂縫性以及枯竭的低能量油氣藏勘探開發(fā)的不斷深入,二氧化碳泡沫壓裂液以其攜砂能力強(qiáng)、濾失低、傷害小以及返排迅速、徹底等優(yōu)勢(shì)而備受青睞。但是目前使用的二氧化碳泡沫壓裂液仍然是以傳統(tǒng)的交聯(lián)胍膠壓裂液為液相形成的泡沫體系,傳統(tǒng)交聯(lián)胍膠壓裂液所存在的對(duì)地層傷害大等問題依然影響著二氧化碳泡沫壓裂液的整體性能和壓裂增產(chǎn)改造的效果。而VES-CO2泡沫壓裂液由于其本身不包含聚合物徹底解決了殘?jiān)扛吆推颇z不徹底等問題,但是也受到耐溫能力和成本的限制,無法廣泛應(yīng)用。本文通過研究新型非交聯(lián)壓裂液體系與二氧化碳泡沫壓裂技術(shù)的特點(diǎn),以丙烯酰胺(AM)、含剛性基團(tuán)的陰離子單體(SS-n)和十六烷基二甲基烯丙基氯化銨(C16DMAAC)為聚合單體,以水溶液無規(guī)共聚的方式合成了聚合物稠化劑DF,并對(duì)實(shí)驗(yàn)條件進(jìn)行了初步的優(yōu)化。對(duì)合成的聚合物稠化劑進(jìn)行紅外光譜表征、熱重分析和溶解性能測(cè)試等,實(shí)驗(yàn)結(jié)果表明聚合物稠化劑基本達(dá)到了理論設(shè)計(jì)的要求。在稠化劑DF的基礎(chǔ)上,完善二氧化碳泡沫壓裂液體系配方,分析聚合物稠化劑實(shí)際應(yīng)用的可行性。實(shí)驗(yàn)研究結(jié)果表明,由該聚合物稠化劑配制的二氧化碳泡沫壓裂液液相具有良好的耐溫耐剪切性能,160℃條件下持續(xù)剪切120min(170s-1)黏度值保持在40mPas以上,保證了足夠的懸砂能力,同時(shí)良好的流變性能保證了其起泡能力和泡沫穩(wěn)定性,在30℃條件下起泡率約為325%,析液半衰期達(dá)到135h。通過破膠性能測(cè)試和導(dǎo)流能力分析,二氧化碳泡沫壓裂液破膠徹底,破膠液表面張力小,殘?jiān)康?對(duì)支撐劑導(dǎo)流層幾乎不產(chǎn)生傷害,表現(xiàn)了良好的清潔效果。本文通過理論研究、實(shí)驗(yàn)合成和性能評(píng)價(jià),驗(yàn)證了合成的聚合物稠化劑用于二氧化碳泡沫壓裂液的可行性,同時(shí)其表現(xiàn)出來的良好的應(yīng)用性能解決了目前對(duì)于低滲透油氣資源壓裂增產(chǎn)改造中遇到的問題,為有效開發(fā)利用低滲透油氣資源提供了新的參考。
[Abstract]:With the deepening of exploration and development of low permeability reservoirs, especially water sensitive, water locked, fractured and depleted low energy reservoirs in China, carbon dioxide foam fracturing fluid has strong sand carrying capacity, low filtration loss, low damage and rapid backflow. Thoroughly and so on superiority and so on is favored. However, the carbon dioxide foam fracturing fluid currently used is still a foam system formed by using the traditional crosslinked guanidine gel fracturing fluid as the liquid phase. The problems existing in the traditional crosslinked guanidine gel fracturing fluid still affect the whole performance of carbon dioxide foam fracturing fluid and the effect of fracturing stimulation. However, VES-CO2 foam fracturing fluid can not be widely used because it does not contain polymer completely to solve the problems of high residue content and incomplete gel breaking, but it is also limited by heat resistance and cost. In this paper, the characteristics of new uncrosslinked fracturing fluid system and carbon dioxide foam fracturing technology were studied. Acrylamide (AM), anionic monomer (SS-n) with rigid group and decaalkyldimethylallylammonium chloride (C16DMAAC) were used as polymeric monomers. The polymer thickener DFD was synthesized by random copolymerization of aqueous solution and the experimental conditions were preliminarily optimized. The synthesized polymer thickener was characterized by infrared spectroscopy, thermogravimetric analysis and solubility test. The experimental results show that the polymer thickener basically meets the requirements of theoretical design. Based on the thickener DF, the formula of carbon dioxide foam fracturing fluid system is improved, and the feasibility of practical application of polymer thickener is analyzed. The experimental results show that the liquid phase of carbon dioxide foam fracturing fluid prepared with this polymer thickener has good temperature and shear resistance at 160 鈩，

本文編號(hào)：2091518