低伤害压井液体系新型粘土稳定剂合成及应用研究
发布时间：2018-10-22 08:37
【摘要】：地层中普遍存在粘土矿物,其主要类型有高岭石、蒙脱石、伊利石等。本文针对粘土矿物水化膨胀及颗粒分散运移造成储层渗透率下降等问题,以1,2-丙二醇(1,4-丁二醇、丙三醇)、环氧氯丙烷、氨水等为原料,通过开环聚合及胺化反应合成了三类有机胺粘土稳定剂,得到了三类粘土稳定剂的最佳合成条件,我们把最佳合成条件下的产物分别记为Lop-1、Lop-2和Lop-3,并筛选出两种原料利用率较高的粘土稳定剂Lop-1和Lop-2。将防膨率作为一项重要指标,通过与市售Bop-3有机胺粘土稳定剂进行比较,考察合成的这两种有机胺粘土稳定剂的防膨性、抗温性、抗酸碱性、长效性、与无机盐复配效果,与压井液的配伍性和对储层伤害程度等应用性能。当以1,2-丙二醇和1,4-丁二醇为起始剂时,其与环氧氯丙烷的最佳物质的量配比为1:8,催化剂乙醇钠的最佳用量为二元醇物质的量的5%,胺化反应的优化条件为:反应温度为110℃,反应时间为6h,氨与氯甲基的最佳物质的量配比为5:1;当以丙三醇为起始剂时,其与环氧氯丙烷的最佳物质的量比1:9,催化剂乙醇钠的最佳用量为丙三醇物质的量的5%,胺化反应的优化条件为:反应温度为130℃,反应时间为8h,氨与氯甲基的最佳物质的量配比为5:1。对于Lop-1、Lop-2,当其质量分数为2%时,防膨率分别达到83.67%、80.93%,防膨效果较好。这两种粘土稳定剂在一定浓度下,随温度和p H的改变,其防膨率变化幅度较小,即两者均具有良好的抗温性和抗酸碱性,抗洗率与Bop-3的相当,都在90%以上,即具有良好的持久性,与无机盐KCl、NH4Cl二元、三元复配后防膨效果好于其单独使用时,其与现场压井液混合均匀后,透明、无沉淀、不分层,即与压井液配伍性优良,经过Lop-1、Lop-2粘土稳定剂处理的岩心在注入蒸馏水时能保持很高的渗透率,K3/K2值达到93.97%-95.09%,即具有较好的储层保护效果。
[Abstract]:Clay minerals are commonly found in the strata, the main types of which are kaolinite, montmorillonite, Illite and so on. Aiming at the problems of reservoir permeability decrease caused by hydration expansion and particle dispersion migration of clay minerals, this paper uses 1o 2-propanediol, epichlorohydrin, ammonia water and so on as raw materials, which are composed of 1o 2-propanediol (1o 4-butanediol, propanediol), epichlorohydrin, ammonia water, etc. Three kinds of organic amine clay stabilizers were synthesized by ring-opening polymerization and amination reaction. The optimum conditions for the synthesis of three kinds of clay stabilizers were obtained. The products under the optimum synthetic conditions were classified as Lop-1,Lop-2 and Lop-3, respectively, and two kinds of clay stabilizers, Lop-1 and Lop-2., with high utilization of raw materials were screened out. The anti-swelling rate was taken as an important index. By comparing it with the Bop-3 clay stabilizer, the anti-swelling, anti-temperature, anti-acid and alkalinity, long-term effect and mixed effect with inorganic salt of the two kinds of organic amine clay stabilizers were investigated. Compatibility with well-killing fluid and application performance such as reservoir damage degree. The optimum mass ratio of 1,2-propanediol to epichlorohydrin is 1: 8, the optimum dosage of catalyst sodium ethanol is 5% of diol, and the optimum conditions of amination reaction are as follows: reaction temperature is 110 鈩，
本文编号：2286663
[Abstract]:Clay minerals are commonly found in the strata, the main types of which are kaolinite, montmorillonite, Illite and so on. Aiming at the problems of reservoir permeability decrease caused by hydration expansion and particle dispersion migration of clay minerals, this paper uses 1o 2-propanediol, epichlorohydrin, ammonia water and so on as raw materials, which are composed of 1o 2-propanediol (1o 4-butanediol, propanediol), epichlorohydrin, ammonia water, etc. Three kinds of organic amine clay stabilizers were synthesized by ring-opening polymerization and amination reaction. The optimum conditions for the synthesis of three kinds of clay stabilizers were obtained. The products under the optimum synthetic conditions were classified as Lop-1,Lop-2 and Lop-3, respectively, and two kinds of clay stabilizers, Lop-1 and Lop-2., with high utilization of raw materials were screened out. The anti-swelling rate was taken as an important index. By comparing it with the Bop-3 clay stabilizer, the anti-swelling, anti-temperature, anti-acid and alkalinity, long-term effect and mixed effect with inorganic salt of the two kinds of organic amine clay stabilizers were investigated. Compatibility with well-killing fluid and application performance such as reservoir damage degree. The optimum mass ratio of 1,2-propanediol to epichlorohydrin is 1: 8, the optimum dosage of catalyst sodium ethanol is 5% of diol, and the optimum conditions of amination reaction are as follows: reaction temperature is 110 鈩，
本文编号：2286663
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