Viscosity breaking agent for oil well produced liquid containing polymer or gel

A technology for producing fluids and polymers, which is applied in drilling compositions, chemical instruments and methods, etc., can solve problems such as low yield and increase, and achieve the effect of reducing load

Active Publication Date: 2012-12-12
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve this problem, technicians tried to increase the amount of conventional viscosity reducer to solve it, but with little effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1: the weight percent of each component that is used for the viscosity reducing agent that contains polymer or gel in oil well production fluid is:

[0048] 1. Polyoxyethylene polyoxypropylene propylene glycol ether (industrial product): 12.15%;

[0049] 2. Fatty alcohol polyoxyethylene ether phosphate monoester ammonium salt (industrial product): 14.15%;

[0050] 3. Fatty alcohol polyoxyethylene ether phosphate monoester (industrial product): 14.5%;

[0051] 4. α-carotene (industrial product): 0.01%;

[0052] 5. N, N'-butylene dilauroyl ammonium bromide (industrial product): 1.05%;

[0053] 6. Diethylene glycol ethyl ether (industrial product): 3.0%;

[0054] 7. Sodium hydroxide (industrial product): 0.5%;

[0055] 8. Fluorocarbon surfactant FN-2 (industrial product): 0.001%;

[0056] 9. Sodium phosphate (industrial product): 0.5%;

[0057] 10. Water: 54.139%.

[0058]Preparation method: First, polyoxyethylene polyoxypropylene propylene glycol ether, ...

Embodiment 2

[0060] Embodiment 2: the weight percent of each component of the viscosity reducing agent that is used for containing polymer or gel in oil well production fluid is:

[0061] 1. Polyoxyethylene polyoxypropylene propylene glycol ether (industrial product): 12.35%;

[0062] 2. Fatty alcohol polyoxyethylene ether phosphate monoester ammonium salt (industrial product): 14.05%;

[0063] 3. Fatty alcohol polyoxyethylene ether phosphate monoester (industrial product): 14.6%;

[0064] 4. α-carotene (industrial product): 0.012%;

[0065] 5. N, N'-butylene dilauroyl ammonium bromide (industrial product): 1.08%;

[0066] 6. Diethylene glycol ethyl ether (industrial product): 2.80%;

[0067] 7. Sodium hydroxide (industrial product): 0.54%;

[0068] 8. Fluorocarbon surfactant FN-2 (industrial product): 0.0012%;

[0069] 9. Sodium phosphate (industrial product): 0.48%;

[0070] 10. Water: 54.0868%.

[0071] The average load of the pumping unit decreased by 84.76 percentage points aft...

Embodiment 3

[0072] Embodiment 3: the weight percent of each component of the viscosity reducing agent that is used for polymer or gel in oil well production fluid is:

[0073] 1. Polyoxyethylene polyoxypropylene propylene glycol ether (industrial product): 12.6%;

[0074] 2. Fatty alcohol polyoxyethylene ether phosphate monoester ammonium salt (industrial product): 13.8%;

[0075] 3. Fatty alcohol polyoxyethylene ether phosphate monoester (industrial product): 14.8%;

[0076] 4. α-carotene (industrial product): 0.013%;

[0077] 5. N, N'-butylene dilauroyl ammonium bromide (industrial product): 1.12%;

[0078] 6. Diethylene glycol ethyl ether (industrial product): 2.65%;

[0079] 7. Sodium hydroxide (industrial product): 0.58%;

[0080] 8. Fluorocarbon surfactant FN-2 (industrial product): 0.0013%;

[0081] 9. Sodium phosphate (industrial product): 0.47%;

[0082] 10. Water: 53.9655%.

[0083] The average load of the pumping unit decreased by 91.39 percentage points after applicatio...

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PUM

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Abstract

The invention relates to a viscosity breaking agent for an oil well produced liquid containing polymer or gel. The viscosity breaking agent comprises the following components in percentage by weight: 12.15-13.05% of polyoxyethylene polyoxypropylene propylene glycol ether, 13.45-14.15% of fatty alcohol-polyoxyethylene ether phosphate monoester ammonium salt, 14.5-15.0% of fatty alcohol-polyoxyethylene ether phosphate monoester, 0.01-0.015% of alpha-carotene, 1.05-1.35% of N,N'-butylidene bilauroyl ammonium bromide, 2.35-3.0% of diethylene glycol diethyl ether, 0.5-0.65% of sodium hydroxide, 0.001-0.0015% of fluorocarbon surfactant FN-2, 0.45-0.5% of sodium phosphate and the balance of water. The invention has the advantage that when the addition quantity of the viscosity breaking agent is 500-800 mg / l, the polymer or gel is dispersed into nonaggregated small particles to be exploited out of ground, and the load of oil well pumping units is reduced. After being tested in more than 10 oil wells, the load of the oil well pumping units is reduced by 81.26% on average.

Description

technical field [0001] The invention relates to the technical field of chemicals used in the petroleum industry, in particular to a viscosity reducer for oil wells and a preparation method thereof, which is a viscosity reducer applied to oil wells containing polymer or gel in oil well production fluid. Background technique [0002] At present, tertiary oil recovery is one of the important measures to enhance oil recovery. However, with the promotion of tertiary oil recovery technology, some oil well production fluids contain polymers or gels. The presence of polymers or gels caused a sharp increase in the load of pumping units, and some oil wells even failed to produce normally. For example, black, soft, and viscous substances appeared in the produced fluid of some oil wells in an oil field. After analysis, it was found that the high molecular polymer content was as high as 0.17%, and the average was 0.08%. Serious sawtooth appeared on the dynamometer diagram, and the load...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/584
Inventor 付亚荣付茜李造吉刘春平李淼李冬青付丽霞许定光文云飞靳瑛杨春燕李小永姜一超胡占国傅新勇贾彦行
Owner PETROCHINA CO LTD
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