Fluorine-containing drainage aid for fracturing

Abstract

The invention provides a fluorine-containing drainage aid for fracturing, which belongs to the technical field of oilfield chemical additives. The drainage aid is composed of sodium perfluorononenyloxybenzene sulfonate with a mass content of 0.1%-0.25%, coconut oil fatty acid diethanolamide with a mass content of 10%-37.5% and the balance of water. The drainage aid has good compatibility with the fracturing fluid, and will not affect the performance of the fracturing fluid itself after compounding, and the surface tension of the fracturing fluid breaking fluid is less than or equal to 28mN / m, and the fracturing fluid breaking fluid and kerosene The interfacial tension is less than 2mN / m.

Description

Technical field: [0001] The invention relates to a fluorine-containing drainage aid for fracturing, belonging to the technical field of oilfield chemical additives. Background technique: [0002] Fracturing technology has been widely used as a commonly used stimulation technology in oilfields. Hydraulic fracturing is to press the high-energy liquid on the ground into the formation, so that the formation is suppressed to form cracks, and proppant is added to fill the cracks, so as to improve the fracture conductivity, increase the permeability of the reservoir, and increase the production. After the fracturing operation is completed, it is necessary to break the gel in time, and return the fracturing fluid to flow back. Incomplete flowback of the gel-breaking fluid will reduce the permeability of the reservoir, and incomplete gel-breaking will generate residues to block the formation and cause damage to the reservoir. The use of the drainage aid can effectively reduce the s...

AI Technical Summary

Problems solved by technology

The types of drugs used in these drainage aid systems are generally more than 4, and the configuration is relatively cumbersome, which is not conducive to popularization and use