Oil well profile control agent and preparation therefor and application thereof

A profile control agent, oil well technology, applied in chemical instruments and methods, drilling composition and other directions, can solve the problems of inability to adapt to high temperature, poor formation selectivity, poor high temperature resistance, etc., and achieves adjustable gel formation time, plugging The effect of strong ability and good high temperature stability

Active Publication Date: 2016-03-02
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the fire flooding profile control agents used in oilfields at home and abroad mainly include inorganic precipitation and organic gel. High temperature under the condition of 300°C, and poor selectivity to the formation, unable to do anything for wells with oil and water in the same layer

Method used

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  • Oil well profile control agent and preparation therefor and application thereof
  • Oil well profile control agent and preparation therefor and application thereof
  • Oil well profile control agent and preparation therefor and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] This embodiment provides a profile control agent for fire flooding gas injection wells, in terms of mass percentage:

[0052]Sulfonated extract SMK: 4%;

[0053] Thermoplastic phenolic resin crosslinking agent DHY-20: 2%;

[0054] Diphenol-based propane type epoxy resin BPANH9782: 0.2%;

[0055] Glass fiber: 0.5%;

[0056] Polyester hyperdispersant Silok7007: 0.2%;

[0057] Potassium ferricyanide: 0.02%;

[0058] The balance is oilfield sewage.

[0059] The specific preparation process is:

[0060] (1) Add thermoplastic phenolic resin and diphenol-based propane epoxy resin into oilfield sewage, heat to 55°C, fully stir and dissolve for 20 minutes, and the stirring speed is 150r / min;

[0061] (2) Add sulfonated tannin extract, polyester hyperdispersant Silok7007, glass fiber, potassium ferricyanide successively to the above solution;

[0062] (3) Adjust the pH value to 10, and continue to stir for 30 minutes to become the profile control agent for fire flooding ga...

Embodiment 2

[0064] This embodiment provides a profile control agent for fire flooding gas injection wells, in terms of mass percentage:

[0065] Sulfonated extract SMK: 10%;

[0066] Thermoplastic phenolic resin crosslinking agent DHY-20: 5%;

[0067] Diphenolic propane type epoxy resin BPANH9782: 0.8%;

[0068] Carbon fiber: 2%;

[0069] Polyester hyperdispersant DA-50: 1%;

[0070] Potassium ferricyanide: 0.1%;

[0071] The balance is oilfield sewage.

[0072] The specific preparation process is:

[0073] (1) Add thermoplastic phenolic resin and diphenol-based propane epoxy resin to oilfield sewage, heat to 65°C, fully stir and dissolve for 30 minutes, and the stirring speed is 300r / min;

[0074] (2) Add sulfonated tannin extract, polyester type hyperdispersant DA-50, carbon fiber, potassium ferricyanide successively to the above solution;

[0075] (3) Use sodium hydroxide to adjust the pH value to 10, and continue to stir for 30 minutes to become the profile control agent for fi...

Embodiment 3

[0082] This embodiment provides a profile control agent for fire flooding gas injection wells, in terms of mass percentage:

[0083] Sulfonated extract SMK: 8%;

[0084] Thermoplastic phenolic resin crosslinking agent DHY-20: 3%;

[0085] Diphenol-based propane type epoxy resin BPANH9782: 0.6%;

[0086] Glass fiber: 1%;

[0087] Polyester hyperdispersant Silok7007: 0.6%;

[0088] Potassium ferricyanide: 0.05%;

[0089] The balance is oilfield sewage.

[0090] The specific preparation process is:

[0091] (1) Add thermoplastic phenolic resin and diphenol-based propane epoxy resin into oilfield sewage, heat to 60°C, fully stir and dissolve for 25 minutes, and the stirring speed is 200r / min;

[0092] (2) Add sulfonated tannin extract, polyester hyperdispersant Silok7007, glass fiber, potassium ferricyanide successively to the above solution;

[0093] (3) Use potassium hydroxide to adjust the pH value to 10, and continue stirring for 30 minutes to become the profile control...

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Abstract

The present invention provides an oil well profile control agent and preparation therefor and application thereof. The profile control agent is prepared by the components in percentage by weight: 4-10% of a sulfonated tannin extract, 2-5% of a crosslinking agent, 0.2-0.8% of a curing agent, 0.5-2% of a flexibilizer, 0.2-1% of a dispersing agent, 0.02-0.1% of a retarder, 0.2-0.6% of a pH value modifier and the balance of water; the percentage by weight is based on the total weight of the profile control agent which is 100%. The water blocking rate of the fireflooding gas injecting well profile control agent reaches 91.4%; the oil blocking rate reaches 20.1%; the temperature resistance reaches 350 DEG C; the mineralization resistance reaches up to 100000 mg / L, and the validity period under a 300 DEG C steam condition can reach longer than 6 months.

Description

technical field [0001] The invention relates to the field of oil well exploitation, in particular, the invention relates to an oil well profile control agent and its preparation and application. Background technique [0002] Affected by large pores or high permeability channels in oil layers, before or during gas injection in fire flooding gas injection wells, there is a history of steam channeling in the fire flooding layer, and it is expected that unidirectional gas channeling or When one-way breakthrough or uneven production is found during gas injection, profile control operations must be carried out to adjust the gas injection profile of the gas injection well, improve the shape of the fire flooding front, increase the fire flooding sweep coefficient, and improve the fire flooding development effect. [0003] At present, the fire flooding profile control agents used in oilfields at home and abroad mainly include inorganic precipitation and organic gel. Under the condit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/514
CPCC09K8/514
Inventor 陈小凯刘德铸王浩李瑞朱伟武文涛李伟李涛吴赞美杨连行贺梦琦阳小英叶华兴姚明活陈达波
Owner PETROCHINA CO LTD
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