交联酸纳米颗粒复合体系制备与性能评价研究
发布时间：2019-05-16 16:38
【摘要】：酸压改造工艺是碳酸盐岩储藏增产及稳产的主导技术之一,但在深层、超深层碳酸盐岩储层酸压施工过程中,常规交联酸耐温耐剪切能力不足,且过早交联造成酸液体系在管道中长时间剪切,使到达地层的酸液粘度过低,极大地影响了酸压施工效果。本文重点研制一种新型交联酸体系,提高体系耐温耐剪切性能,并使其具有延缓交联性,解决酸压施工在深层、超深层碳酸盐岩储层应用中的诸多问题。通过优选实验,确定了基本酸种类,以及稠化剂种类与加量。以氧氯化锆、多元醇、醇胺、多羟基羧酸为原料,合成了一种新型有机锆交联剂JLJ-11。通过比较冻胶强度及交联时间,对JLJ-11的制备工艺进行了优化。实验结果表明:当水:多羟基羧酸B:醇胺A:八水合氧氯化锆:多元醇F质量比为1:1:2:2:3,反应时间为3h,反应温度为70℃时,合成的酸冻胶具有延缓交联性,且耐温性能较好。在此基础上,通过向体系中加入缓蚀剂、铁离子稳定剂、助排剂、破胶剂等酸液添加剂,并通过优选,得到了新型交联酸的最终配方:0.8%稠化剂FS3802+1.0%交联剂JLJ-11+2.0%酸液缓蚀剂HJF-10+1.0%铁离子稳定剂TWJ-10+1.0%助排剂CF-5A+0.1%破胶剂PC330。为进一步提高交联酸耐温耐剪切性能,在得到新型交联酸体系的基础上,将其与纳米SiO_2混合使用,得到交联酸纳米颗粒复合体系。通过对纳米材料的优选试验,确定选用亲水型HDK?气相SiO_2,型号为T30,加量为0.5%。通过对比实验,分析纳米材料的加入对体系耐温耐剪切性、延缓交联性的影响,实验结果表明:纳米颗粒的加入虽对延缓交联性没有明显影响,但是显著提高了体系的耐温耐剪切性能,复合体系在150℃、170s-1条件下,持续剪切1h后粘度仍高于50mPa·s。实验参考行业标准对交联酸纳米颗粒复合体系进行综合性能评价。实验结果表明:复合体系配伍性较好,具有优越的悬砂性能,滤失系数小、缓蚀率高、缓速性能显著,同时破胶彻底,破胶液粘度低,无残渣,符合酸压现场施工相关要求。
[Abstract]:Acid fracturing transformation technology is one of the leading technologies for carbonate storage and stable production, but in the process of acid fracturing construction of deep and ultra-deep carbonate reservoirs, the temperature and shear resistance of conventional crosslinked acid is insufficient. The premature cross-linking results in the long time shear of the acid system in the pipeline, which makes the viscosity of the acid liquid arriving in the formation too low, which greatly affects the construction effect of acid fracturing. In this paper, a new type of crosslinked acid system is developed to improve the temperature and shear resistance of the system, and to make it have the ability of delaying cross-linking, so as to solve many problems in the application of acid fracturing in deep and ultra-deep carbonate reservoirs. Through the optimal selection experiment, the basic acid type, as well as the type and dosage of thickener were determined. A new type of organic zirconium crosslinker JLJ-11. was synthesized from zirconium oxychloride, polyol, alkylamine and polyhydroxycarboxylic acid. The preparation process of JLJ-11 was optimized by comparing gel strength and cross-linking time. The experimental results show that when the mass ratio of water: polyhydroxycarboxylic acid B: alkylamine A: zirconium chloride octahydrate: polyol F is 1 鈮，
本文编号：2478414
[Abstract]:Acid fracturing transformation technology is one of the leading technologies for carbonate storage and stable production, but in the process of acid fracturing construction of deep and ultra-deep carbonate reservoirs, the temperature and shear resistance of conventional crosslinked acid is insufficient. The premature cross-linking results in the long time shear of the acid system in the pipeline, which makes the viscosity of the acid liquid arriving in the formation too low, which greatly affects the construction effect of acid fracturing. In this paper, a new type of crosslinked acid system is developed to improve the temperature and shear resistance of the system, and to make it have the ability of delaying cross-linking, so as to solve many problems in the application of acid fracturing in deep and ultra-deep carbonate reservoirs. Through the optimal selection experiment, the basic acid type, as well as the type and dosage of thickener were determined. A new type of organic zirconium crosslinker JLJ-11. was synthesized from zirconium oxychloride, polyol, alkylamine and polyhydroxycarboxylic acid. The preparation process of JLJ-11 was optimized by comparing gel strength and cross-linking time. The experimental results show that when the mass ratio of water: polyhydroxycarboxylic acid B: alkylamine A: zirconium chloride octahydrate: polyol F is 1 鈮，
本文编号：2478414
本文链接：https://www.wllwen.com/kejilunwen/shiyounenyuanlunwen/2478414.html
