Synthesis and characterization of low viscosity adsorption acid retarder

doi:10.16085/j.issn.1000-6613.2019-1099

Abstract

Abstract:

In the process of acidification, acid solution has different treatment effects on strata with different permeability. In order to improve the recovery rate of low permeability strata, the acid retarder with low viscosity and adsorption was obtained by free radical aqueous solution polymerization of four kinds of monomers, AM, FLZ-1, dmdaac-18 and SSS. The best synthetic conditions were determined by single factor method. The structure of the product was characterized by Fourier infrared spectrometer, NMR spectrometer. The results were in agreement with the designed structure. By investigating acidification retarding agent added amount of retarded acid, the results showed that when the dosage and mass fraction of retarder was 0.7%, the slow effect is better and had lower apparent viscosity (below 10mPa·s), which was beneficial to the injection and backflow of acid. The compatibility of retarding agent and other acid additives was evaluated at 75℃. The results showed good compatibility, and the various additives did not affect each use efficiency. And the results of gas drainage, XPS and scanning electron microscopy (SEM) showed that the retarder adsorbed on the rock surface during the acid rock reaction.

Key words: retarding agent, quaternary copolymer, low viscosity, slow performance, adsorption

摘要：

为改善深度酸化效果，降低储层二次伤害风险，合成了一种低黏吸附型酸化缓速剂。采用AM、非离子型表面活性剂（FLZ-1）、C-18、SSS 4种单体，通过自由基水溶液聚合得到一种低黏且具有吸附作用的酸化缓速剂。通过单因素法筛选出最佳的合成条件，利用傅里叶红外光谱仪和核磁共振波谱仪对产物的结构进行表征，结果与设计的结构相符。通过考察酸化缓速剂添加量对缓速酸性能的影响，结果表明当缓速剂添加量质量分数为0.7%时，缓速效果较好且具有较低的表观黏度（10mPa·s以下），有利于酸液的注入与返排。并在75℃下对缓速剂与其他酸液常用助剂的配伍性进行评价，结果显示配伍性良好，且各种助剂之间不影响各自的使用效果。排水采气、X射线光电子能谱和扫描电镜的结果表明，缓速剂在酸岩反应的过程中在岩石表面发生了吸附。

关键词: 缓速剂, 四元共聚物, 低黏, 缓速性能, 吸附

CLC Number:

TE39

Zhengrong YE,Hongping QUAN,Zhichao QIU,Qiangying LU,Rui WANG,Qingying JIANG,Ran YI. Synthesis and characterization of low viscosity adsorption acid retarder[J]. Chemical Industry and Engineering Progress, 2020, 39(4): 1396-1404.

叶正荣,全红平,裘智超,路强英,王睿,蒋庆英,伊然. 低黏吸附型酸化缓速剂的合成及性能评价[J]. 化工进展, 2020, 39(4): 1396-1404.

Figures/Tables 22

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药品名称	规格	生产厂家
丙烯酰胺（AM）	AR	成都科龙化工试剂厂
非离子型表面活性剂（FLZ-1）	工业级	江苏海安石油化工厂
十八烷基二甲基烯丙基氯化铵（DMDAAC-18）	AR	成都顺达利聚合物有限公司
对苯乙烯磺酸钠（SSS）	AR	成都科龙化工试剂厂
偶氮二异丁基脒盐酸盐（V50）	AR	伊普瑞斯科技有限公司
无水乙醇	AR	成都市科龙化工试剂厂
碳酸钙（教学试剂）	分析纯	成都市科龙化工试剂厂
盐酸	AR	成都市科龙化工试剂厂

药品名称	规格	生产厂家
丙烯酰胺（AM）	AR	成都科龙化工试剂厂
非离子型表面活性剂（FLZ-1）	工业级	江苏海安石油化工厂
十八烷基二甲基烯丙基氯化铵（DMDAAC-18）	AR	成都顺达利聚合物有限公司
对苯乙烯磺酸钠（SSS）	AR	成都科龙化工试剂厂
偶氮二异丁基脒盐酸盐（V50）	AR	伊普瑞斯科技有限公司
无水乙醇	AR	成都市科龙化工试剂厂
碳酸钙（教学试剂）	分析纯	成都市科龙化工试剂厂
盐酸	AR	成都市科龙化工试剂厂

仪器名称	规格型号	生产厂家
数显智能型恒温水浴锅	GKC-2	上海波洛实验设备有限公司
电热恒温鼓风干燥箱	DHG-9140A	上海齐欣科学仪器有限公司
电动六速旋转黏度计	ZNN-D6B	青岛同春仪器公司
傅里叶变换红外光谱仪（FTIR）	WQF-520	北京瑞利分析仪器公司
环境扫描电子显微镜（SEM）	Quanta 450	美国FEI公司

仪器名称	规格型号	生产厂家
数显智能型恒温水浴锅	GKC-2	上海波洛实验设备有限公司
电热恒温鼓风干燥箱	DHG-9140A	上海齐欣科学仪器有限公司
电动六速旋转黏度计	ZNN-D6B	青岛同春仪器公司
傅里叶变换红外光谱仪（FTIR）	WQF-520	北京瑞利分析仪器公司
环境扫描电子显微镜（SEM）	Quanta 450	美国FEI公司

n(AM)∶n(FLZ-1)∶n(DMDAAC-18)∶n(SSS)	溶蚀率/%
90∶5∶4∶1	40.65
94∶2∶2.5∶0.5	37.36
96.5∶2∶1∶0.5	20.14
96∶2∶1.5∶0.5	18.62
95.7∶3∶1∶0.3	26.41
94∶3∶2.5∶0.5	26.01
95.5∶2∶2∶0.5	28.02
96.5∶2∶1∶0.5	25.16