耐高温硅烷化瓜尔胶与醚化瓜尔胶压裂液体系研发及评价

发布时间：2018-01-31 00:28

本文关键词： 硅烷化瓜尔胶醚化瓜尔胶助剂筛选性能评价　出处：《西南石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：我国油气资源量丰富,拥有巨大的开发潜力。目前大多数储层需要进行压裂改造来提高产能,压裂液作为压裂改造的工作液直接影响着压裂改造效果。而稠化剂作为压裂液体系中最主要的成分之一,备受关注,目前使用最广泛的稠化剂是瓜尔胶及其衍生物稠化剂,如GG、HPG、CMHPG等等。但它们都有明显的缺点,如耐温性差、抗剪切性差、残渣含量高、成本昂贵等等。本文在充分调研国内外瓜尔胶类稠化剂研究现状的基础上,对瓜尔胶原粉进行了改性研究,并针对改性瓜尔胶筛选出压裂液体系的助剂,对压裂液体系进行了综合评价,取得如下主要成果:(1)对瓜尔胶进行硅烷化改性研究,制备出硅烷化瓜尔胶,并用红外光谱仪与扫描电镜对其进行了微观表征。(2)对影响硅烷化瓜尔胶性能的反应因素进行了研究,得到最佳的制备条件为:反应物质量比为40:1,反应温度100℃,反应时间2h。(3)针对硅烷化瓜尔胶筛选了压裂液体系主要的助剂,并对硅烷化瓜尔胶压裂液体系基础配方进行了优化。(4)对硅烷化瓜尔胶压裂液体系进行了稳定性评价,实验结果表明该体系适用于160 ℃以下的地层。(5)该体系的破胶性能、残渣含量及携砂性能进行了考察,该体系破胶彻底,残渣含量仅为560mg/L,破胶液表面张力小于28mN/m,并且该体系携砂能力良好。(6)用硅烷化瓜尔胶压裂液破胶液的滤液与地层水进行了配伍性实验,并进行了岩芯渗透率损害评价实验,结果表明该体系与地层水配伍性良好,对岩芯渗透率有一定程度的损害,但经返排后渗透率恢复情况良好。(7)对瓜尔胶进行醚化改性研究,制备出醚化瓜尔胶,并用红外光谱仪及扫描电镜对其进行了微观表征。(8)对影响醚化瓜尔胶性能的反应因素进行了研究,结果表明在200mL蒸馏水为溶剂、瓜尔胶加量为2g、氢氧化钠加量(10%Wt)为1mL、卤代烃加量(1,3二氯丙醇)为0.18g、四丁基溴化铵加量为32.5mg、反应温度为70℃、反应时间为6h、碱化时间30min的条件下得到的醚化瓜尔胶性能最佳。(9)针对醚化瓜尔胶筛选了压裂液体系主要的助剂。本文研制的硅烷化瓜尔胶压裂液体系性能良好,可用于160℃的储层改造。
[Abstract]:Rich oil and gas resources in China, has great potential for development. At present, most of the reservoirs in need of fracturing to increase productivity, fracturing fluid as working fluid fracturing directly affect the fracturing effect. And thickening agent as one of the most important components of the fracturing fluid system has attracted much attention, currently used thickener is the most widely used thickener guar gum and its derivatives, such as GG, HPG, CMHPG and so on. But they have obvious disadvantages, such as low temperature resistance, shear resistance, high residue content, high cost and so on. The basic research on the status of the agent in the full research at home and abroad, melon thick glue on the shgg was modified, and the modified guar gum fracturing fluid additives were selected, a comprehensive evaluation of the fracturing fluid system, the main achievements are as follows: (1) the modification of guar gum by silylation, prepared silicon Alkylated guar gum, and using infrared spectroscopy and scanning electron microscopy of the microscopic characterization. (2) the influence on the performance of silanization reaction of guar gum were studied, the best conditions for the preparation were obtained: the reaction mass ratio was 40:1, the reaction temperature is 100 DEG C, the reaction time for 2h. (3) silane screening of additives of guar gum fracturing fluid system mainly, and the silane based guar fracturing fluid system formula was optimized. (4) the stability evaluation of the silylated guar gum fracturing fluid system, the experimental results show that the system is suitable for 160 DEG formation. (5) gel breaking performance of the system and, the residue content of sand carrying performance were investigated, the system completely broken plastic, the residue content is only 560mg/L, gel breaking liquid surface tension is less than 28mN/m, and the system has good sand carrying ability. (6) the filtrate and formation water gel breaking liquid with silane into guar gum fracturing fluid The compatibility experiments, and the core permeability damage evaluation experiment, the results show that the system has good compatibility with formation water, there is a certain degree of damage to core permeability, but the flowback after the permeability recovery in good condition. (7) the modification of guar gum was prepared by etherification, etherification of guar gum. By using Fourier transform infrared spectroscopy and scanning electron microscope for microscopic characterization. (8) the influence on the performance of etherified guar gum reaction were studied, the results indicated that in 200mL distilled water as solvent, guar gum dosage was 2G, dosage of sodium hydroxide (10%Wt) as 1mL, plus the amount of halogenated hydrocarbons (1,3 two chloropropanols) for 0.18g, four Butyl Ammonium Bromide dosage was 32.5mg, reaction temperature 70 C, reaction time 6h, alkalization time 30min are obtained under the conditions of the properties of etherified guar gum. (9) for the screening of guar gum etherification additives are the fracturing fluid system developed in this paper. The silanate guar gum fracturing fluid system has good performance and can be used for reservoir reconstruction at 160 C.

【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE357.12

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