The Study Of Diversion Acidizing Technique Of Variable Viscosity Micelle Acid Of High Temperature Heterogeneity Sandstone And The Mechanism Of Reaction Of Mud Acid With Mineral

Confront with the problem of effective layout of acid and the problem of second damage of silica gel during reaction of acid with mineral in high temperature heterogeneity sandstone reservoir, this article firstly put forward develop amphoteric viscoelastic surfactant micelle acid used for diversion acid in high temperature heterogeneity sandstone reservoir, successfully developed sinapic amido propyl betaine micelle acid which own the property of self-diverting; systematic established coupling kinetics model of flowing and reaction of acidizing in high temperature reservoir firstly, realized repeat reproduce of the reaction process of reaction of acid with mineral, quantized silica gel and ascertained its location, established optimal design method of acidizing in high temperature heterogeneity sandstone reservoir; In the same time, established micelle gel diversion model and real-time monitoring model which can response the working state of diverter and other working fluid, formed sandstone micelle acid diversion acidizng technology. The main work of this article include:I . Originate with the research of the relation of construction and property of surfactant, emphatically analyse the feature of micelle form and the property of micelle aggregating under different pH, draw a conclusion that the viscosity of amphoteric surfactant fluid own significant pH effect, In detail analysed the relation of construction and property of amphoteric surfactant, design out a new amphoteric viscoelastic surfactant molecular structure, denominate sinapic amido propyl betaine.II. Through the research of synthesis method of amphoteric surfactant, track out the synthesis method of sinapic amido propyl betaine, successfully synthesized sinapic amido propyl betaine, measured the amount of product, optimized synthesis condition by orthogonal experiment.III. Originate with the research of the reaction of sinapic amido propyl betaine acid with sandstone mineral and its viscosity changing mechanism, researched out the viscoelastic surfactant acid system which can be applied in sandstone reservoir, and studied its viscoelastic behaviour and rheology, also the effect of additive on its rheology, finally, evaluated its property by core flow experiment.IV. On the basis of mastered the mechanism of reaction of mud acid and sandstone mineral, firstly derived the coupling kinetics model of flowing and reaction in nature, thence established coupling kinetics model of flowing and reaction of acidizing in high temperature reservoir, and solved the model by computer program, repeat reproduce of the reaction process of reaction of acid with mineral by computer program, through changing the operation condition and the operation parameter revealed the feature of silica gel generating,...