In order to enrich clean fracturing fluid systems in high temperature formations,a novel fracturing fluid was developed using cationic gemini surfactant (JS) as thickening agent and NH4Cl as counter-ion salt.JS which had a special structure consisting of ultra-long hydrophobic chains and amide groups,was synthesized using a main feedstock erucic acid obtained from rapeseed for thickening purposes.In this paper,the surface activity of JS and the formulation of JS/NH4Cl were investigated.And the performances of optimal formation of JS/NH4Cl such as temperature and shear tolerance properties,SEM and cryo-TEM morphology,viscoelasticity and fracturing properties were systematically evaluated.The results showed that JS had a low CMC value,and the optimum formulation of JS/NH4Cl system was 2.0％ JS + 1.0％ NH4Cl.The JS/NH4Cl system had good temperature and shear tolerance property,forming a three-dimensional network structure and exhibiting a strong viscoelastic characteristic.The JS/NH4Cl fluid could be broken automatically with oil and could be meet the fracturing requirements at 120 ℃.So,JS is a very promising candidate for fracturing.%为了丰富耐高温清洁压裂液体系,以来自于植物的芥酸为主要起始原料,嵌入酰胺基团,合成超长链双子表面活性剂(JS)作为稠化剂;并复合NH4Cl助剂配制清洁压裂液体系.考察了JS的表面活性;并对JS/NH4Cl体系进行配方优化.评价了优化体系的耐温耐剪切性、SEM和cryo-TEM形貌、黏弹性及压裂性能.结果表明:JS的CMC值低,优化的JS/NH4Cl体系配方为2.0％ JS+1.0％ NH4Cl,该体系耐温耐剪切性良好,可形成三维网状结构,呈现弹性流体性质,与油可自动破胶,能够满足120℃地层的压裂要求,具有良好的应用前景.
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