摘要
辽河冷东原油胶质、沥青质含量高(23.65%,3.05%),含蜡量低(1.02%),粘度高(50℃时49Pa·s),为了改善其流动性,研制了长链醇丙烯酸酯三元共聚物,进行了结构鉴定并实验考察了降粘性能。在性能考察中使用的共聚物样品有:一种具有双峰的宽分子量分布共聚物SL;在优化条件下合成的共聚物SL 5;SL的3个分级产物,按分子量从大到小排列分别为SL(Ⅰ),SL(Ⅱ)和SL(Ⅲ)。确定实验条件时考虑到该特稠油中胶质的溶解温区为33~55℃,原油热处理、加剂在80℃下进行,降粘效果评价在50℃左右进行。实验研究结果表明:加入2000mg/LSL的冷东1号油(SL溶解于甲苯中,甲苯量为原油的1%),50℃时粘度9.5Pa·s,降粘率39.9%,55℃时粘度6.1Pa·s,降粘率37.8%;加入SL,SL(Ⅰ),SL(Ⅱ),SL(Ⅲ)的冷东2号油,50℃时粘度分别为19.0,18.3,19.0,15.6Pa·s,降粘率分别为23.4%,26.2%,23.4%,37.1%,60℃时分别为6.8,6.1,5.4,5.1Pa·s和15.8%,24.5%,33.3%,36.9%;对冷东1号油,30~60℃时的降粘率按大小排列顺序为SL 5>SL(Ⅲ)>EVA。作出的结论是:对于辽河高胶质特稠油的降粘,分子量分布适当的优选共聚物SL可在50℃使用,配合一些热处理措施后可在管道输油中获得实际应用(要求粘度≤1.5Pa·s)。图3表7参10。
To improve the flowability of Lengdong extraheavy crude oils of high resin and asphaltene (23.65% and 3.05%) and low wax (1.02%) contents and of high viscosity (49 Pa·s at 50℃), long chain alkyl acrylate tercopolymers (TCP) are prepared,structureally identified and evaluated for viscosity reducing ability. In laboratory evaluation experiments of TCP sample, SL, of wide MWD with two peaks, a sample prepared under optimized synthetic conditions, SL5, and three fractions of SL of decreasing MW, SL(Ⅰ),SL(Ⅱ), and SL(Ⅲ), are used. The experimental conditions are chosen as such that the crude is treated thermally and by a viscosity reducer at 80℃ and evaluated for viscosity reduction at ~50℃ as the dissolution of the resin in the crude occurs in range 33-55℃. The experimental results show that the crude sample No1 with 2 000 mg/L SL added (SL dissolved in toluene which accounts 1% of the crude) has viscosity 9.5 Pa·s and viscosity reduction rate (VRR) 39.9% at 50℃ and 6.1 Pa·s and VRR 37.8% at 55℃; the crude sample No2 treated by SL, SL(Ⅰ), SL(Ⅱ), and SL(Ⅲ) has viscosity 19.0, 18.3,19.0 and 15.6 Pa·s (and VRR 23.4%, 26.2%, 23.4%,and 37.1%) at 50℃ and 6.8, 6.1, 5.4, and 5.1 Pa·s (15.8%, 24.5%,33.3%, and 36.9%) at 60℃, respectively; for crude sample No1, the VVR at 30-60℃ is arranged in order SL5>SL(Ⅲ)>EVA. It is concluded that for reducing viscosity of high resin extraheavy crudes of Liaohe, optimized oil soluble tercopolymer SL with proper MWD can be applied at 50℃ and be put into practical uses in pipe transportation (viscosity needed ≤1.5 Pa·s) with additional thermal treatments.Keywords:tercopolymers of long chain alkyl acrylate; oil soluble viscosity reducers; flowablity improvers; synthesis; extraheavy crude; high resin crude; viscosity reduction; structureproperty relationship; Liaohe oil fields
出处
《油田化学》
CAS
CSCD
北大核心
2003年第1期78-82,共5页
Oilfield Chemistry
关键词
长链醇丙烯酸酯三元共聚物
油溶性降粘剂
流动性改进剂
合成
特稠油
高胶质原油
降粘
结构
性能
辽河油田
tercopolymers of long chain alkyl acrylate
oil soluble viscosity reducers
flowablity improvers
synthesis
extra-heavy crude
high resin crude
viscosity reduction
structure-property relationship
Liaohe oil fields