Dual functions of ultra-low interface tension for air-injected foam and oil-injected
Instruction manual for foaming agent KPMQ-5209
Innovation points: dual functions of strong foaming and ultra-low interface tension
1. KPMQ-5209 performance:
The dual-function ultra-low interfacial tension foaming agent for air injection foam and composite oil flooding is prepared by using organic raw materials and zwitterionic surfactants designed with molecular structure as the main raw materials, and is prepared by copolymerization and multifunctional group graft polymerization reaction and strengthening homogenization process. It is suitable for high-temperature, salt resistance, high mineralization oxygen-reducing air foam flooding, steam nitrogen foam flooding, and carbon dioxide flooding in Xinjiang oil fields. It has both ultra-low interface tension of oil-repellent and high-strength foaming and foam stabilization capabilities.

2. Product Features

Research and development of high-efficiency composite foam dual-function system: For the oil layer characteristics, by matching the molecular weight of the crude oil of 325-535 to design with KPMQ-5209 with a molecular weight structure of more than 100, it is developed and obtained suitable crude oil flooding characteristics; it must first meet the high-efficiency ultra-low interface tension, with a concentration range of 0.1%-0.3% <5x10-3 mN/m., and the foam mass is at the same time; the foam rate is greater than 400ml and the half-life is greater than 10min.
(1) KPMQ-5209 foam oil flooding technology has an ideal oil flooding effect with its unique seepage characteristics (concentration 0.1%-0.35% to achieve ultra-low interface tension under high temperature and high salt conditions, foaming and having a high visual viscosity), and therefore is interested and supported by the majority of users in the oil field to promote and apply.
 (2) KPMQ-5209 is not only suitable for the air foam flooding of dilute crude oil and heavy oil reservoirs in the sandstone reservoirs and carbonate reservoirs in Xinjiang oil fields, but also for monomer and binary flooding (supramolecular structure polymer + KPMQ-5209); it can be widely used in the regulation and regulation of KPMQ-5209 and the secondary envelope composite expansion particles.
(3) KPMQ-5209 foaming agent system, the (ultra-) low adsorption retention amount for rocks during formation migration (the specific surface of low permeability is 2 to 10 times that of medium and high permeability).
(4) The KPMQ-5209 foam system has both high visual viscosity and must meet the technical requirements for improving impact efficiency.
(5) The foaming speed of the foam system ≈ the foam defoaming speed, ensures the foam regeneration of the foam driven, the continuous foaming ability, and ensures the transport distance of large sections of the foam.
three. KPMQ-5209 Technical Indicators
 
        KPMQ-5209 Foaming Agent Main Technical Performance Indicators

	name	index
1	Appearance	Light yellow-brown liquid
2	proportion	1.01~1.20
4	pH value of 1% aqueous solution	6.0~8.0
5*	Foaming capacity/mL (0.35%)	400
6	Foam half-life/min	5
7	Oil-water interface tension (0.1-0.35) mN/m	5x10-3

KPMQ-5209 is widely used in low-permeability and medium-permeability oil fields. The oil and gas wells are produced in three times to improve recovery rate. It has strong foaming ability, tight and uniform foam, long half-life, good foam stability, and has 5X10-3mN/m oil-driving ultra-low interface tension. It has characteristics such as salt resistance, mineral resistance, good oil resistance, alkali-free, and non-toxic and safe use.
KPMQ-5209 can be used for well repair measures, low-density completion fluid configuration, foam fluid washing, acidification, mixing and discharge of oil wells, and reduce or eliminate pollution damage to oil field reservoirs. It solves the technical problem that conventional foaming agents are not resistant to oil and have poor stability after contact with condensate.

5. Recommended usage of KPMQ-5209 injection method
1. Air foam drive, nitrogen foam drive, static injection according to the design, segmented plug injection or mixed injection. (Inject KPMQ-5209 aqueous solution section plug-in-injection section plug-in-clean water section plug-in-gas-water mixing section plug) Dosage: KPMQ-5209 recommends preparing 0.1-0.35% aqueous solution, and inject it into the oil and gas layer from the annex with a pump truck or a section control pump.
2. Compound nitrogen foam displacement method; mixing of --? Steam injection, --?Nitrogen injection, --?KPMQ-5209 aqueous solution can be used.
3. The oil-displacement can be used as the main section plug; it is recommended to use a oil-displacement pump or pump truck for injection construction; the recommended concentration is 0.3-0,5%; the front section plug (dividing partition wall sealing)-KPMQ-5209 oil-displacement section plug-in-expanded particle sealing glue section plug.
6. Packaging and storage: This product is packaged in plastic buckets or iron pipes. The net weight of each bucket is 200kg agreed 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.