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Fracturing composite thickener

A thickening agent and fracturing technology, which is applied in the direction of drilling composition, chemical instruments and methods, etc., can solve the problems of large amount of thickening agent, low-cost development of oilfields and increased material costs, etc., to achieve stable output and price, reduce This and inhibition effect are obvious and the effect of good adaptability

Inactive Publication Date: 2014-12-17
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the thickener concentration of slick water and base fluid required by this technology is low, the total amount required is often several times that of ordinary fracturing technology, resulting in a large amount of thickener. In the current environment of rising international guar gum futures prices , adding additional material costs to the low-cost development of the oil field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Mix 1# thickener with the following composition and ratio:

[0017]

[0018] Use a mixer to prepare the above-mentioned thickener solution according to 0.15%, and use a six-speed rotary viscometer to measure the viscosity. The indicators are as follows:

[0019] Complete swelling time: 15 minutes;

[0020] Apparent viscosity (normal temperature, 170S -1 ): 9mPa.s;

[0021] Proppant (20 / 40 mesh ceramsite, particle density: 3.1g / cm 3 ) Static sedimentation rate: 3.3cm / s.

[0022] Use a mixer to prepare the above thickener solution according to 0.5%, and use a six-speed rotary viscometer to measure the viscosity. The indicators are as follows:

[0023] Complete swelling time: 35 minutes;

[0024] Apparent viscosity (normal temperature, 170S -1 ): 54mPa.s;

[0025] Proppant (20 / 40 mesh ceramsite, particle density: 3.1g / cm 3 ) Static sedimentation rate: 0.9cm / s. Example 2

Embodiment 2

[0026] Mix 1# thickener with the following composition and ratio:

[0027]

[0028] Use a mixer to prepare the above-mentioned thickener solution according to 0.15%, and use a six-speed rotary viscometer to measure the viscosity. The indicators are as follows:

[0029] Complete swelling time: 12 minutes;

[0030] Apparent viscosity (normal temperature, 170S -1 ): 7.5mPa.s;

[0031] Proppant (20 / 40 mesh ceramsite, particle density: 3.1g / cm 3 ) Static sedimentation rate: 3.5cm / s.

[0032] Use a mixer to prepare the above thickener solution according to 0.5%, and use a six-speed rotary viscometer to measure the viscosity. The indicators are as follows:

[0033] Complete swelling time: 30 minutes;

[0034] Apparent viscosity (normal temperature, 170S -1 ): 42mPa.s;

[0035] Proppant (20 / 40 mesh ceramsite, particle density: 3.1g / cm 3 ) Static sedimentation rate: 1.1cm / s. Example 3

Embodiment 3

[0036] Mix 1# thickener with the following composition and ratio:

[0037]

[0038]

[0039] Use a mixer to prepare the above-mentioned thickener solution according to 0.15%, and use a six-speed rotary viscometer to measure the viscosity. The indicators are as follows:

[0040] Full swelling time: 20 minutes;

[0041] Apparent viscosity (normal temperature, 170S -1 ): 10.5mPa.s;

[0042] Proppant (20 / 40 mesh ceramsite, particle density: 3.1g / cm 3 ) Static sedimentation rate: 2.9cm / s.

[0043] Use a mixer to prepare the above thickener solution according to 0.5%, and use a six-speed rotary viscometer to measure the viscosity. The indicators are as follows:

[0044] Complete swelling time: 40 minutes;

[0045] Apparent viscosity (normal temperature, 170S -1 ): 52.5mPa.s;

[0046] Proppant (20 / 40 mesh ceramsite, particle density: 3.1g / cm 3 ) Static sedimentation rate: 0.7cm / s.

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Abstract

The invention relates to a fracturing composite thickener comprising 50-70% of seaweed glue, 10-20% of a collaborative tackifier, 10-20% of a cosolvent and 5-10% of a drag reducer, the fracturing composite thickener has good water solubility, the swelling time is 10 to 45 minutes, the viscosity value of a fracturing fluid base liquid prepared according to the dosage of 0.3% is measured at room temperature, under the conditions of 170S-1 by use of a six-speed rotational viscometer, and the viscosity value is 15-33mPa.s, the drag reduction rate is 59-68%, the proppant static sedimentation rate is 0.5-3.5cm / s, the technical requirements of the mixed water fracturing can be met, to be more important, raw materials of the fracturing composite thickener are all domestic, yield and price are stable, in the case of sharp fluctuation in the price of guanidine gum, cost reduction and inhibitory effects are obvious.

Description

technical field [0001] The invention relates to the technical field of oil-water well stimulation in oil fields, in particular to a composite thickener for fracturing. Background technique [0002] Hydraulic fracturing is the main measure for the effective development of low-permeability oil and gas fields. In recent years, due to the successful application of the concept of volume fracturing, in-depth research has been carried out at home and abroad, and a series of technological advances have been made, among which the mixed water fracturing technology is one of them. . This technology has mainly experienced four development processes: in the 1980s, clean water fracturing was the main method; in the 1990s, it transitioned to slick water fracturing; at the beginning of this century, it developed into mixed water fracturing; Hybrid water fracturing technology. Among them, the mixed water fracturing technology is mainly aimed at tight reservoirs with developed natural fract...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68
CPCC09K8/68C09K8/882C09K8/885C09K8/905C09K2208/28
Inventor 常彦荣朱天寿沈复孝陆红军陈宝春李建山李楷曹润荣杜现飞赵伯平初新东马红生朱鑫
Owner PETROCHINA CO LTD
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