Preparation method for high-temperature crosslinking agent for oil field tertiary oil recovery

A cross-linking agent and high-temperature technology, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the development and application of low-cost profile control and flooding systems in the middle and deep layers, health and environmental hazards of construction personnel, and system High toxicity and other problems, to achieve the effect of excellent thermal stability, low price and low cost
CN102649902AInactive Publication Date: 2012-08-29唐山冀油瑞丰化工有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
唐山冀油瑞丰化工有限公司
Publication Date
2012-08-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a preparation method for a high-temperature crosslinking agent for oil field tertiary oil recovery. The high-temperature crosslinking agent is prepared by compounding a double active group (hydroxyl methylene-CH2OH) crosslinking agent A and a crosslinking agent B according to the requirements on displacement control and profile control in different ratios, wherein the crosslinking agent B is synthesized by melamine, formaldehyde and ketone; the mass ratio of the crosslinking agent A to the crosslinking agent B of the crosslinking agent for displacement control is 5:1 to 1:1; the mass ratio of the crosslinking agent A to the crosslinking agent B of the crosslinking agent for profile control is 1:2 to 1:5; and the mass ratio of the crosslinking agent A to the crosslinking agent B of the crosslinking agent for displacement control and profile control is 1:1 to 1:3. The preparation method is scientific, is low in preparation cost and toxicity and contributes to construction and operation. Particularly, when the high-temperature crosslinking agent is applied to deep profile control, displacement control, profile control and displacement control construction in the stratum at the temperature of between 70 and 120 DEG C in the oil field tertiary oil recovery, about 26 million yuan can be created every year and the profit is 3 million yuan.
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Description

technical field

[0001] The invention relates to a chemical agent for petroleum and oil fields, in particular to a preparation method of a high-temperature crosslinking agent for oil field tertiary oil recovery. Background technique

[0002] In oilfield tertiary oil recovery, the cross-linking agent reacts with polyacrylamide to form gels with different shapes, which are used in oilfield profile control, flood control and water shutoff technology to enhance oil recovery. Currently commonly used polyacrylamide crosslinking agents mainly include high-valent metal ions (such as chromium, aluminum, titanium, zirconium) and organic synthesis (such as water-soluble phenolic resin). High-valent metal ions are used in low temperature (≤65°C) and acidic oil reservoirs. For the deep profile control and flooding technology of medium and high temperature reservoirs, the main water-soluble phenolic resin crosslinking agent. Chen Quansheng and others applied for CN101381440A "A Preparati...

Claims

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