Flowable heavy oil cold production continuous viscosity reduction foaming and oil repellent active agent SDKX-6669
heavy oil cold production product innovation points: SDKX-6669 foams and viscosity reduction dual functions to continuously reduce viscosity under different oilfield reservoir temperature conditions, without rebounding. The stability is better than conventional viscosity reduction agents.

• Overview and Features

1. Sinovac heavy oil cold production air foam dispersing and reducing agent SDKX-6669 (hereinafter referred to as SDKX-6669) is composed of supramolecular structure, zwitterionic and non-dual ion composite. Their branch chains have different types of strong polar groups. The heavy oil is rich in colloids, asphaltene, has a complex structure with a polycyclic aromatic nucleus and a branched alkyl group. It contains a large number of oxygen, nitrogen, and sulfur atoms, which form hydrogen bonds with each other with hydroxyl, ester, amino, carboxyl, thiol and other groups, creating a great cohesion force, causing multiple colloids and asphaltene molecules to form sheet-like and three-dimensional bulk accumulations, thus showing a high viscosity of crude oil. After adding oil-soluble viscosity reducers, the oil-soluble viscosity reducers will be interspersed between the colloids and asphaltene molecules of the heavy oil. The strong polar groups of the oil-soluble viscosity reducer interact with the polar groups of the heavy oil to form new hydrogen bonds. Relatively destroying the hydrogen bond between the original thick oil molecules, weakening the cohesion, and the colloid and asphaltene cannot form or form smaller accumulations, thereby reducing the viscosity of crude oil.
2. In the synthesis of SDKX-6669 products, the foam tube energy groups are grafted by supramolecular viscosity reduction active agents, and the foam is innovatively reduced and high foaming is suitable for heavy oil cold production air foam migration, ensuring foam regeneration, and exerting the continuity and stability of the viscosity reduction system.
3. The innovative points of SDKX-6669 products are synthesized to continuously reduce viscosity and not rebound by targeting the problems of high temperature, high mineralization, high salt flow heavy oil, and extra heavy oil blocks mixed with dilute oils and extra heavy oil blocks, as well as the problems of reducing viscosity and fast viscosity rebound in conventional wellbores.

• Application scope

SDKX-6669 products are widely used for heavy oil injection bubble drive, flowable heavy oil cold production low-concentration water drive, SDKX-6669 can move into medium and high-temperature reservoirs during heavy oil water drive to play a continuous and efficient viscosity reduction effect, and can also be used for hot water oil flooding efficiency after heavy oil hot production multi-wheel drive.

• Technical requirements

Item	Index
Appearance	Colorless to light brown liquid
PH value	7~8
Density (20℃, g/cm 3 )	0.8~1.100
Viscosity reduction (added 0.35%), %	40~70
Foaming rate ＞	389

 SDKX-6669 test result curve diagram

Continuous viscosity reduction and no rebound (after 1 day),

continuous viscosity reduction and no rebound (after 3 days)

Continuous viscosity reduction and no rebound (after 7 days)
4. Recommended dosage: 0.33%~5%.
5. Packaging and storage: This product is packaged in plastic barrels or iron pipes. The net content per barrel is agreed upon according to user requirements. The net content tolerance complies with JJF 1070-2005. The packaging barrel should be firm and free of leakage, and other packaging methods can also be adopted according to user requirements.
Store in a ventilated and dry warehouse. It is prohibited to be placed near a heat source for a long time, and the storage period is 20 months.