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Sludge reinforced main body gel system used for gel dispersion body, and preparation method thereof

A technology of jelly dispersion and sludge, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of high gel strength, difficulty in entering deep formations, and difficulty in deep control and flooding, and achieve temperature resistance Good salt tolerance, suitable for preparation operations, and short freezing time

Active Publication Date: 2019-08-09
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since this method forms a pre-crosslinked control and displacement agent on the ground, the gelation strength is high, and it is difficult to penetrate deep formations, so it is difficult to achieve the effect of deep control and displacement.

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  • Sludge reinforced main body gel system used for gel dispersion body, and preparation method thereof
  • Sludge reinforced main body gel system used for gel dispersion body, and preparation method thereof

Examples

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preparation example Construction

[0038] The present invention also provides the preparation method of the above-mentioned jelly dispersion sludge strengthening body jelly system, comprising the steps of:

[0039] (1) At room temperature (20±5°C), add large sludge particles and grinding balls with a particle size of 3-10 mm into the ball mill, adjust the speed of the ball mill to 30-60 rpm, and the grinding time to 40-50 minutes , making the sludge by grinding;

[0040] (2) At room temperature (20±5°C), first add the polymer to the dosing water, stir for 1-2 hours, and wait until it is fully dissolved;

[0041] (3) Add cross-linking agent, stir for 15-30 minutes, and wait for it to fully dissolve;

[0042] (4) Add coagulant, stir for 15-30 minutes, and wait for it to fully dissolve;

[0043] (5) Add sludge and stir for 15-30 minutes until it is fully dispersed;

[0044] (6) Put the system in a constant temperature box and age at 85-95° C. for 3-6 hours to obtain the jelly dispersion and use sludge to strength...

Embodiment 1

[0046] The jelly dispersion uses sludge to strengthen the bulk jelly system, including: non-ionic polymer mass fraction is 0.3%; resin crosslinking agent, mass fraction is 0.9%; sodium chloride coagulant, mass fraction is 0.1%; Mud, the mass fraction is 0.1%; the remainder is mixed with clear water, the mass fraction is 98.6%, and the sum of the mass fractions of each component is 100%.

[0047] (1) Sludge preparation method: at room temperature (20±5°C), add large sludge particles into a ball mill (power of 0.75kw), screen the grinding balls with a particle size of 3-10mm, and add them to the ball mill to adjust The rotating speed of the ball mill is 30 rpm, and the grinding time is 50 minutes, and sludge particles with a particle size of 1-15 μm are obtained through grinding.

[0048] (2) The preparation method of the jelly dispersion using sludge to strengthen the body jelly system: add 0.3g of polymer to 98.6g of dosing water, stir for 1 hour to obtain a uniformly dissolve...

Embodiment 2

[0051] The jelly dispersion uses sludge to strengthen the bulk jelly system, including: non-ionic polymer mass fraction is 0.4%; resin crosslinking agent, mass fraction is 1.2%; sodium chloride coagulant, mass fraction is 0.3%; Mud, the mass fraction is 0.2%; the remainder is mixed with clear water, the mass fraction is 97.9%, and the sum of the mass fractions of each component is 100%.

[0052] (1) Sludge preparation method: at room temperature (20±5°C), add large sludge particles into a ball mill (power of 0.75kw), screen the grinding balls with a particle size of 5-10mm, and add them to the ball mill to adjust The rotating speed of the ball mill is 45 rev / min, and the grinding time is 50 minutes, and sludge particles with a particle size of 1-15 μm are obtained through grinding.

[0053] (2) The preparation method of the jelly dispersion using sludge to strengthen the body jelly system: add 0.4g polymer to 97.9g dosing water, stir for 1.5 hours to obtain a uniformly dissolv...

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Abstract

The invention belongs to the field of oil field chemistry, and discloses a sludge reinforced main body gel system used for a gel dispersion body, and a preparation method thereof. The sludge reinforced main body gel system comprises, by mass, sludge of 0.05% to 0.3%, a polymer of 0.3% to 0.6%, a cross-linking agent of 0.9% to 1.8%, a coagulant of 0.05% to 0.5%, and liquid preparation water of 96.8to 98.7%. Adding of the hard wear-resistant sludge system with chemical performance is capable of reinforcing the performance of main body gel of common gel dispersion bodies, the coagulant is addedto shorten the gelling time of the main body gel, and the main body gel system is suitable to be used in conventional gel dispersion body preparation technology.

Description

technical field [0001] The invention relates to the field of oilfield chemistry, in particular to a sludge-reinforced body jelly system for jelly dispersions and a preparation method thereof. Background technique [0002] At present, it is urgent to effectively control water and increase oil production in oil and gas fields. However, the developed or proven oil and gas fields in China are mainly distributed in continental sedimentary basins. Oilfield reservoirs have serious permeability differentiation and strong heterogeneity. In addition, the vast majority of reservoirs are developed by waterflooding. With the increase of the water flooding period, it is easy to form a dominant channel of water flow in the formation, resulting in water cone, water channeling, water fingering and other phenomena, resulting in premature water breakthrough or water flooding of the oil well, low water injection sweep coefficient, and low-efficiency water flooding Or the ineffective circulat...

Claims

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Application Information

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IPC IPC(8): C09K8/512
CPCC09K8/512
Inventor 邹辰炜杨倩茹谷成林吕亚慧李嘉鸣赵光
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)