Super heavy oil well profile control agent and application

Abstract

The invention provides a super heavy oil well profile control agent which comprises composition a and composition b, wherein the composition a comprises components in percentage by mass as follows: 0.5%-1% of hydrolysis polyacrylamide, 0.5%-2% of an organic crosslinking agent, 0.1%-0.5% of a heat stabilizer, 0%-1% of a slow gelatinizing agent and the balance of water; the composition b comprises a gas generation agent and a surfactant; the gas generation agent is liquid carbon dioxide or urea; when the gas generation agent is liquid carbon dioxide, the mass ratio of liquid carbon dioxide to the surfactant is (80-100): (6-8); when the gas generation agent is urea, the mass ratio of urea to the surfactant is (70-150): (5-12). The super heavy oil well profile control agent can effectively prevent gas channeling, influence of planar gas channeling on oil displacing is reduced, voidage of the stratum can be effectively compensated, the stratum pressure is increased, the throughput effect of an oil well is improved, and the output per period is increased.

Description

technical field [0001] The invention relates to a profile control agent for super-heavy oil wells and its application, and belongs to the field of chemical additives for oil exploitation. Background technique [0002] At present, super-heavy oil wells mainly adopt the steam huff-puff production method. With the increase of development rounds, problems such as poor huff-puff effect and large production decline are gradually exposed. Through the analysis of the steam huff-puff law and influencing factors of super-heavy oil , considered that the main reasons for the poor huff and puff effect of oil wells are: firstly, the production status of the oil layers is uneven, and the plane steam channeling is serious, so that a large amount of underground crude oil cannot be produced; The decline is manifested in the decrease of the daily production level of the oil well cycle and the extension of the production period; the third is that due to the influence of underground water, the s...

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Problems solved by technology

[0002] At present, super-heavy oil wells mainly adopt the steam huff-puff production method. With the increase of development rounds, problems such as poor huff-puff effect and large production decline are gradually exposed. Through the analysis of the steam huff-puff law and influencing factors of super-heavy oil , considered that the main reasons for the poor huff and puff effect of oil wells are: firstly, the production status of the oil layers is uneven, and the plane steam channeling is serious, so that a large amount of underground crude oil cannot be produced; The decline is manifested in the decrease of the daily production level of the oil well cycle and the extension of the production period; the third is that due to the influence of underground water storage, steam first contacts with water, and the heat utilization rate decreases

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