膨胀型自悬浮支撑剂的制备及性能评价

发布时间：2018-11-20 05:51

【摘要】：为了提高支撑剂在清水中的悬浮性能、改善支撑剂在裂缝中的分布、简化压裂施工工艺、提高压裂措施产量,通过在支撑剂表面进行硅烷偶联改性引入双键,再通过接枝聚合反应将膨胀树脂接枝在支撑剂表面,制得膨胀型自悬浮支撑剂,研究了硅烷偶联剂种类及用量、单体比例、单体浓度对自悬浮支撑剂膨胀性能的影响。结果表明,在支撑剂、丙烯酰胺(AM)、丙烯酸(AA)、N,N'-甲叉基双丙烯酰胺(MBA)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)质量比为600∶71∶40∶1∶8,硅烷偶联剂加量1%,引发剂加量1‰,单体(AA、AM、AMPS、MBA)质量分数20%,反应温度30℃的条件下制得的自悬浮支撑剂在清水中的膨胀倍数为1.5~5;支撑剂膨胀性能受阳离子浓度的影响,影响强弱顺序为Mg~(2+)Ca~(2+)K~+Na~+;压裂模拟结果表明,自悬浮支撑剂的运移铺置效果好于常规支撑剂,其支撑裂缝半长为119.2 m,比常规支撑剂提高24%。
[Abstract]:In order to improve the suspending property of proppant in clear water, improve the distribution of proppant in fracture, simplify the fracturing process and increase the production rate of fracturing, the double bond is introduced by silane coupling modification on the surface of proppant. Then the swelling resin was grafted on the surface of the proppant by grafting polymerization to prepare the expansive self-suspension proppant. The effects of the type and amount of silane coupling agent monomer ratio and monomer concentration on the expansion properties of the self-suspension proppant were studied. The results show that the mass ratio of acrylamide (AM), acrylic acid (AA), Nnna-methylbisacrylamide (MBA), 2-acrylamide 2-methylpropanesulfonic acid (AMPS) is 600: 71: 40: 1: 8, the results show that the mass ratio of acrylamide (AM), acrylic acid (AA),) and methacrylate bisacrylamide (MBA),) is 600: 71: 40: 1: 8. The amount of silane coupling agent is 1: 1 鈥，

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