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Instant modified cellulose cross-linked clean fracturing fluid and preparation method thereof

A technology for cleaning fracturing fluid and cellulose, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problem of unconventional oil and gas reservoirs that are difficult to meet large-scale fracturing and instant dissolution, require large cycle power, and various types of additive materials and other problems, to achieve a good effect of inhibiting the hydration expansion ability of clay, avoiding poor viscosity, and good placement stability

Active Publication Date: 2014-06-25
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Apparently, this liquid mixing method commonly used in mines has many types of added materials, requires a large cycle power, and takes a long time for liquid mixing, which is difficult to meet the needs of large-scale fracturing and instant dissolution in unconventional oil and gas reservoirs.

Method used

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  • Instant modified cellulose cross-linked clean fracturing fluid and preparation method thereof
  • Instant modified cellulose cross-linked clean fracturing fluid and preparation method thereof
  • Instant modified cellulose cross-linked clean fracturing fluid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This embodiment provides an instant modified cellulose cross-linked cleaning fracturing fluid, which is composed of the following components:

[0030] FAG-500 type modified cellulose, 0.2 parts by weight; FAZ-1 type thickening initiator, 0.15 parts by weight; DL-16 type drainage aid, 0.3 parts by weight; FAJ-305 type crosslinking regulator, 1.0 parts by weight ; FAC-201 type polar chelating organic zirconium crosslinking agent, 0.35 parts by weight; NBA-102 type capsule gel breaker, 0.007 parts by weight; water, 100 parts by weight.

[0031] The instant modified cellulose cross-linked cleaning fracturing fluid is prepared according to the following steps:

[0032] Step 1: Add FAG-500 modified cellulose and FAZ-1 viscosity-increasing initiator to water in turn under stirring conditions, and then stir for 3 minutes to obtain an aqueous cellulose solution;

[0033] Step 2: Add DL-16 type drainage aid and FAJ-305 type cross-linking regulator to the above cellulose aqueous ...

Embodiment 2

[0037] This embodiment provides an instant modified cellulose cross-linked cleaning fracturing fluid, which is composed of the following components:

[0038] FAG-500 type modified cellulose, 0.25 parts by weight; FAZ-1 type thickening initiator, 0.15 parts by weight; DL-16 type drainage aid, 0.3 parts by weight; FAJ-305 type crosslinking regulator, 1.0 parts by weight ; FAC-201 type polar chelating organic zirconium crosslinking agent, 0.4 parts by weight; NBA-102 type capsule gel breaker, 0.006 parts by weight; water, 100 parts by weight.

[0039] The instant modified cellulose cross-linked cleaning fracturing fluid is prepared according to the following steps:

[0040] Step 1: Add FAG-500 modified cellulose and FAZ-1 viscosity-increasing initiator to water in turn under stirring conditions, and then stir for 3 minutes to obtain an aqueous cellulose solution;

[0041] Step 2: Add DL-16 type drainage aid and FAJ-305 type cross-linking regulator to the above cellulose aqueous ...

Embodiment 3

[0045] This embodiment provides an instant modified cellulose cross-linked cleaning fracturing fluid, which is composed of the following components:

[0046] FAG-500 type modified cellulose, 0.3 parts by weight; FAZ-1 type thickening initiator, 0.2 parts by weight; DL-16 type drainage aid, 0.3 parts by weight; FAJ-305 type crosslinking regulator, 1.0 parts by weight ; FAC-201 type polar chelating organic zirconium crosslinking agent, 0.5 parts by weight; NBA-102 type capsule gel breaker, 0.005 parts by weight; water, 100 parts by weight.

[0047] The instant modified cellulose cross-linked cleaning fracturing fluid is prepared according to the following steps:

[0048] Step 1: Add FAG-500 modified cellulose and FAZ-1 viscosity-increasing initiator to water in turn under stirring conditions, and then stir for 3 minutes to obtain an aqueous cellulose solution;

[0049] Step 2: Add DL-16 type drainage aid and FAJ-305 type cross-linking regulator to the above cellulose aqueous so...

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Abstract

The invention relates to instant modified cellulose cross-linked clean fracturing fluid. The instant modified cellulose cross-linked clean fracturing fluid consists of the following components in parts by weight: 0.2-0.6 part of FAG-500 type modified cellulose, 0.1-0.5 part of FAZ-1 type tackifying initiator, 0.3-0.7 part of DL-16 type discharge aiding agent, 0.5-1.2 parts of FAJ-305 type cross-linking regulator, 0.2-0.7 part of FAC-201 type polar chelate type organic zirconium cross-linking agent, 0.002-0.07 part of NBA-102 type encapsulated gel breaker and 100 parts of water. The invention further provides a preparation method of the instant modified cellulose cross-linked clean fracturing fluid. The instant modified cellulose cross-linked clean fracturing fluid provided by the invention has performance better than that of a normal fracturing fluid system, has the advantages of being instant, temperature-resistant, shearing-resistant, easy in glue breaking, free of residue, and environment-friendly, can be used for the low-permeability oil gas filed, particularly in fracture mining of an easily-damaged storage layer.

Description

technical field [0001] The invention relates to an instant modified cellulose cross-linked clean fracturing fluid for oil and gas reservoir fracturing stimulation and a preparation method thereof, belonging to the technical field of petroleum exploitation. Background technique [0002] As the main stimulation method for low-permeability oil and gas reservoirs, fracturing technology has developed rapidly. Fracturing fluid is an important part of fracturing technology. Water-based fracturing fluid is commonly used at home and abroad, accounting for more than 80%. Water-based fracturing fluid uses water as the medium, adding additives such as fracturing fluid thickener, bactericide, clay stabilizer, pH regulator, demulsifier, drainage aid, crosslinking agent, gel breaker, temperature stabilizer, etc. , the fracturing fluid thickener is the main agent, mostly plant gums (such as guar gum, coumar gum, safflower gum and their derivatives), synthetic polymers (such as polyacrylami...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68
CPCC09K8/604C09K8/685C09K8/706C09K8/887C09K8/90C09K2208/26
Inventor 舒玉华卢拥军管宝山刘玉婷程兴生邱晓惠明华翟文
Owner PETROCHINA CO LTD
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