Preparation method of profile control agent for oil field deep temporary blocking

A profile control agent, deep technology, applied in chemical instruments and methods, drilling composition, etc., to achieve the effect of high gel strength, good adsorption and blocking effect, and changing flow direction

Active Publication Date: 2009-09-16
DALIAN TRICO CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In water injection wells, the use of layered water injection and layered transformation of low-permeability layers are important measures to make the water line advance more evenly, but not in all cases can solve the problem better

Method used

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Experimental program
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Embodiment Construction

[0017] The preparation method of the profile control agent that the present invention proposes to be used for oilfield deep temporary plugging, comprises the following steps:

[0018] (1) Weigh the following components by the following mass percentages:

[0019] Delayed crosslinking agent A: phenolic resin 1.5-3.33%

[0020] Delayed crosslinking agent B: organic chromium 0.125-0.3%

[0021] Delayed crosslinking agent C: Glacial acetic acid 0.27%

[0022] Delayed crosslinking agent D: resorcinol 0.025-0.06%

[0023] Composite ionomer: polyacrylamide 0.1-0.8%

[0024] Yu Weishui

[0025] (2) Slowly add the above weighed polyacrylamide into the weighed water and stir. After 30 minutes, add the above weighed delay crosslinking agent B and delay crosslink D agent, and stir for 10 minutes , and finally add the above-mentioned delayed crosslinking agent A and delayed crosslinking agent C weighed.

[0026] The profile control agent proposed by the present invention for deep temp...

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Abstract

The invention relates to a preparation method of a profile control agent for oil field deep temporary blocking, belonging to the technical field of petroleum exploration. Phenolic resin, organic chromium, glacial acetic acid, resorcinol and polyacrylamide are firstly weighed according to mass percentages, then the weighed polyacrylamide is slowly added in weighed water and stirred, and the weighted other retarding crosslinking agents are sequentially added and stirred. The profile control agent for the oil field deep temporary blocking prepared by the method has the advantages that the gelling time of the profile control agent is controllable during the use by adding different crosslinking agents, the gelling time is 8-48 hours; the gel strength is great, the gel is difficult to break, and the validity period is 1-2 years; the profile control agent can effectively change the water flow of injection water of a formation and have great absorption and blocking effects on the formation.

Description

technical field [0001] The invention relates to a preparation method of a profile control agent used for temporary plugging in deep oilfields, and belongs to the technical field of petroleum exploitation. Background technique [0002] The profile control agent is used to adjust the water absorption profile of the water injection well, and the deep profile control means that the radius of the profile control is between 10-30m. [0003] In order to solve the problem of premature water production from oil wells, people have done a lot of work on development plans and production measures. In terms of development plan, a reasonable well layout method is adopted; in terms of exploitation measures, the method of layered water injection is adopted. However, due to the heterogeneity of the formation structure, it is still impossible to avoid the uneven advancement of the injected water along the high-permeability layer; Reason, still can cause the phenomenon that oil well produces ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/42
Inventor 桂钦民
Owner DALIAN TRICO CHEM
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