一种钻井液滤失剂的合成与室内评价

Synthesis and Evaluation of a Fluid Loss Additive with Significant Inhibition

摘要:

摘要：以丙烯酰胺（AM）、2-丙烯酰胺基-2-甲基丙磺酸（AMPS）、二甲基二烯丙基氯化铵（DMDAAC）、丙烯基吡咯烷酮（NVP）为单体，亚硫酸钠-过硫酸铵（质量比为1:2）为引发剂，制备了一种性能优异的钻井液降滤失剂PAADN。通过不同反应条件对聚合物降滤失剂性能的影响研究，得到最优合成条件：单体比为m（AM）：m（AMPS）：m（DMDAAC）：m（NVP）=51:40:6:3，单体总浓度为20%，反应温度为55℃，pH为7，引发剂用量为单体质量的0.5%，反应时间为5h。对该聚合物进行表征和性能评价得出：红外光谱图中未显示双键特征峰，并且含有各个单体特征官能团峰，证明单体全部参与反应；热重热差分析结果显示，该聚合物热稳定性好，可达326.5℃；该降滤失剂对淡水、盐水、人工模拟海水基浆均表现出良好的降失水效果。

Abstract:

Abstract: Through sodium sulfite and ammonium persulfate (mass ratio is 1:2) as the initiator,and acrylamide (AM), 2-acrylamide-2-methyl propane sulfonic acid (AMPS), dimethyl diallyl ammonium chloride (DMDAAC), and allyl pyrrolidone (NVP) as the monomers,getting a kind of performant polymer PAADN,which can be used in the drilling mud.Bying studying the polymer synthesis,we got the optimum synthesis condition: monomer ratio of m(AM) : m(AMPS) : m(DMDAAC) : m(NVP) is 51:40:6:3, total monomers concentration is 20%, the reaction temperature is 55 ℃, pH is 7, dosage of initiator is 0.5%, the reaction time is 5 h.Evaluating the performance of the polymer showed that the infrared spectrum characteristic peaks have not shown double bonds peak，and it contains every monomer peak which we can conclude that all monomers take part in reaction; thermogravimetric analysis results showed that the polymer thermal stability is good, and it can also resist 326.5 ℃; Putting polymer in fresh water mud, salt water mud and artificial simulated seawater mud ,all of muds showing good preference.