抗高温油井水泥降失水剂的合成及性能评价  

Synthesis and Performance Evaluation of High Temperature Resistant Fluid Loss Reducer for Oil Well Cement

作　　者：李晓岚[1,2] 国安平[2] 李韶利[3] 马小龙[3] 孙举[2] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009 [2]中原石油勘探局钻井工程技术研究院,河南濮阳457001 [3]中原石油勘探局固井工程处,河南清丰457331

出　　处：《油田化学》2013年第2期164-167,共4页Oilfield Chemistry

基　　金：国家重大专项课题二专题三"超深水平井固井配套技术"的子专题"超高温防窜耐腐蚀固井水泥浆体系研究"(项目编号2011ZX05017-002-03)

摘　　要：以丙烯酰胺(AM)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)和N-乙烯基吡咯烷酮(NVP)合成了三元共聚物油井水泥降失水剂,考察了单体质量分数、单体配比对聚合物降失水性能的影响。在75℃、6.9MPa下,含三元共聚物的水泥浆失水量随单体质量分数的增加先降低后增加,随AMPS加量的增加而增大,随NVP加量的增加变化较小。最佳合成条件为:单体质量分数12%,AM、AMPS、NVP摩尔比8.5:1.0:0.5,反应温度70℃,反应时间5 h,引发剂加量0.7%,pH值为12。当降失水剂加量为4.2%时,水泥浆在160℃时的失水量为60mL,浆体的初始稠度为14 Bc,稳定性好,水泥石强度发展快。Terpolymer of fluid loss reducer for oil well cement was synthesized by acrylamide （AM）, 2-acrylamido-2-methyl-propane sulfonic acid （AMPS） and N-vinyl pyrrolidone （NVP）. The effects of the monomer concentration, monomer ratio on the fluid loss performance of polymer were investigated. Under the condition of 75℃ and 6.9 MPa, the API fluid loss of the cement slurry first decreased and then increased with increasing monomer content, increased with increasing AMPS dosage, and changed slightly with increasing NVP dosage. The＇optimum reaction condition was obtained as follows： 12% monomer mass fraction, 8.5：1.0：0.5 monomer mole ratio of AM：AMPS：NVP, 70℃ reaction temperature, 5 h reaction time, 0.7% initiator and 12 pH value. The fluid loss of cement mortar containing 4.2% （BWOC） polymer at 160℃ was of. 60 mL with good slurry stability, 14 Bc initial consistency and rapid development of cement stone strength.

关 键 词：丙烯酰胺 2-丙烯酰胺基-2-甲基丙磺酸 N-乙烯基吡咯烷酮 油井水泥 降失水剂 

分 类 号：TE254.4[石油与天然气工程—油气井工程]