Preparation method and application of unified clean fracturing fluid

Abstract

The invention discloses a preparation method and the application of unified clean fracturing fluid. The method comprises the steps of adding a solvent into a reaction kettle, and controlling the reaction temperature to be 60 DEG C; starting a mixer, sequentially adding a scale inhibitor, and carrying out reaction for 10-30min; adding a clay stabilizer, and carrying out reaction for 10-30min; adding a non-emulsifier and carrying out reaction for 10min; adding reversed phase ions and carrying out reaction for 20-30min; adding a micro-package agent and carrying out reaction for 20-50min; adding a cationic surface active agent into the reaction kettle, and carrying out reaction for 30-60min. According to the method, the reversed phase ions and the cationic surface active agent which influence each other are combined together, so that micelle can not be formed under the condition of high concentration, and the characteristics of viscoelastic clean fracturing fluid can be formed; the reversed phase ions can be released under the condition of low concentration to form micelle together with the cationic surface active agent, so that the performance characteristic of viscoelasticity can be generated; the fracturing sand-carrying property is stable, gel can be thoroughly broken when the unified clean fracturing fluid comes across the oil gas; the product contains the components which are supplementary, so no liquid preparation device is neededand the good effect of preventing an oil layer from being damaged can be achieved.

Description

technical field [0001] The invention relates to the preparation of a clean fracturing fluid, in particular to a preparation method of a synergistic clean fracturing fluid, which belongs to the field of oilfield chemical fracturing fluid. Background technique [0002] Clean fracturing fluid is usually a kind of fracturing fluid prepared on-site with thickener, reversed-phase ion, clay stabilizer, and potassium chloride as raw materials. At present, there are the following problems: [0003] (1) On-site preparation requires special liquid dispensing equipment and professional management personnel to complete, and the realization of liquid preparation requires a lot of material and manpower. [0004] (2) Existing products do not take into account the compatibility of clean fracturing fluid with formation water, emulsification with crude oil, and possible damage to formations. [0005] Restricted by traditional operations and other factors, clean fracturing fluids are supplied ...

AI Technical Summary

Problems solved by technology

[0003] (1) On-site preparation requires special liquid dispensing equipment and professional management personnel to complete, and the realization of liquid preparation requires a lot of material and manpower

[0004] (2) Existing products do not consider the compatibility of clean fracturing fluid with formation water, emulsification with crude oil, and possible damage to formations

[0005] Restricted by traditional operations and other factors, clean fracturing fluids are supplied and applied with more than several products, which causes great troubles for on-site application