Integrated method for continuous on-line production and injection of viscous oil emulsion particle diverting agent

Abstract

The invention belongs to the field of petroleum engineering, and relates to an integrated method for continuous on-line production and injection of emulsion particle diverting agents in heavy oil reservoirs; adding heavy oil and water into a high-speed dispersing shearing machine according to the mass ratio of 1:4-9, Add emulsifier, phase inversion agent and stabilizer in sequence, the speed of the high-speed dispersing shearer is 0-1500rpm, and the shearing time is 10-20min to obtain a thick oil emulsion particle diversion agent; the prepared thick oil emulsion particle diversion The agent enters the buffer tank; injects water into the buffer tank through the flowmeter, and dilutes to the on-site injection concentration; pumps the thick oil emulsion particle diverting agent in the buffer tank into the water injection well through the high-pressure plunger pump. The invention realizes the integration of continuous on-line production and injection of the emulsion particle diverting agent in the heavy oil reservoir. While pumping into the injection well, the production and injection of the emulsion particle diverting agent in the heavy oil reservoir are continuously carried out online, that is, the production is instant Injection can meet the needs of multi-well groups or blocks with large doses of continuous profile control.

Description

technical field [0001] The invention belongs to the field of petroleum engineering, and in particular relates to an integrated method for continuous on-line production and injection of emulsion particle diverting agents in heavy oil reservoirs. technical background [0002] my country is rich in heavy oil resources, accounting for about 30% of the total oil reserves. During steam huff and puff and steam flooding in heavy oil reservoirs, steam-water channeling is prone to occur, resulting in low steam utilization efficiency, increased water content in oil wells, and reduced production. Therefore, how to suppress the steam-water channeling of heavy oil reservoirs is the key to the development of heavy oil reservoirs in the middle and later stages. At present, the steering agents used for steam channeling in heavy oil thermal recovery wells mainly include foam, jelly, inorganic particles and other systems. Foam diverting agents mainly include temperature-resistant foaming age...

AI Technical Summary

Problems solved by technology

Foam diverting agents mainly include temperature-resistant foaming agents such as alkylbenzene sulfonate and α-olefin sulfonate, which can improve steam (water) flooding sweep coefficient and oil displacement efficiency, but foam construction is relatively complicated. Poor controllability and short validity period; jelly-type plugging agents are mainly formed of heat-resistant polymers, tannin extract (modified tannin extract), lignin, etc., and can withstand a temperature of 200°C, but due to the high concentration used, the cost is relatively high High; granular plugging agents mainly include inorganic rigid particles such as ultra-fine cement, viscosity, fly ash, etc., but these inorganic particles have poor mobility and are often deposited near the wellbore

[0003] In addition, during the injection process of the above-mentioned diverting agent, the way of preparing the diverting agent on site and directly pumping it into the water injection well is often used, which is difficult to meet the large dose, especially the online injection of multiple well groups or blocks, especially not suitable for difficult transportation or long-term storage.

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