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Anti-collapse agent of zwitterionic emulsified asphalt for drilling fluid

A zwitterionic and emulsified asphalt technology, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of failing to consider the low temperature in winter, prone to stratification, and unqualified product quality, so as to improve the quality of winter Utilization rate and drilling efficiency, solving difficulties in use, and improving quality

Active Publication Date: 2014-08-13
YUMEN OIL FIELD KEDA CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) After the product is stored for a certain period of time, it is prone to stratification, that is, the storage stability is poor;
[0004] (2) In the process formula, the addition of more raw material components makes the content of additives and other auxiliary materials in the product exceed the standard, while the content of effective substances such as asphalt is less, resulting in low content of effective substances and unqualified product quality;
[0005] (3) In the production process, the problem of low temperature in winter was not considered, and effective antifreeze materials were not added, resulting in poor antifreeze effect in winter and unusable products due to lack of fluidity

Method used

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  • Anti-collapse agent of zwitterionic emulsified asphalt for drilling fluid

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation process of the No. 1 test sample of zwitterionic emulsified asphalt anti-slump agent for drilling fluid is as follows:

[0027] a. First, dissolve 360kg of 100# road asphalt into the dissolution pool, and control the temperature between 140-150°C;

[0028] b. Add 400kg of industrial additive oil weighed and 100# road asphalt dissolved in the above step a into the reactor, and control the temperature between 110-120°C to dissolve;

[0029] c. Add 160 kg of the weighed emulsifier sulfonated pitch, 8 kg of the zwitterionic emulsifier dodecyl dimethyl sulfopropyl betaine, and 40 kg of the organic stabilizer polyvinyl alcohol into the dissolved materials in the above step b During the emulsification reaction, control the temperature between 70-80°C and emulsify for 3 hours;

[0030] d. After the emulsification of the above step c is completed, add 192kg of pour point depressant aviation kerosene and 840kg of water, start the shearing pump, and perform sheari...

Embodiment 2

[0033] The preparation process of the No. 2 test sample of zwitterionic emulsified asphalt anti-slump agent for drilling fluid is as follows:

[0034] a. First, dissolve 480kg of 100# road asphalt into the dissolution pool, and control the temperature between 140-170°C;

[0035] b. Add 560kg of industrial additive oil weighed and 100# road asphalt dissolved in the above step a into the reactor, and control the temperature between 110-120°C to dissolve;

[0036] c. Add 260 kg of the weighed emulsifier sulfonated pitch, 12 kg of the zwitterionic emulsifier dodecyl dimethyl sulfopropyl betaine, and 28 kg of the organic stabilizer polyvinyl alcohol into the dissolved materials in the above step b During the emulsification reaction, control the temperature between 70-80°C and emulsify for 3 hours;

[0037] d. After the emulsification of the above step c is completed, add 220kg of jet depressant aviation kerosene and 440kg of water, turn on the shear pump, and perform shearing, con...

Embodiment 3

[0040] The preparation process of the No. 3 test sample of zwitterionic emulsified asphalt anti-slump agent for drilling fluid is as follows:

[0041] a. First, dissolve 580kg of 100# road asphalt into the dissolution pool, and control the temperature between 140-170°C;

[0042] b. Add 700kg of industrial additive oil weighed and 100# road asphalt dissolved in the above step a into the reactor, and control the temperature between 110-120°C to dissolve;

[0043] c. Add 320kg of the weighed emulsifier sulfonated asphalt, 16kg of the zwitterionic emulsifier dodecyldimethylsulfopropyl betaine, and 20kg of the organic stabilizer polyvinyl alcohol into the dissolved materials in the above step b During the emulsification reaction, control the temperature between 70-80°C and emulsify for 3 hours;

[0044] d. After the emulsification of the above step c is completed, add 264kg of aviation kerosene as pour point depressant and 100kg of water, start the shearing pump, and perform shear...

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Abstract

The invention provides an anti-collapse agent of zwitterionic emulsified asphalt for drilling fluid. The anti-collapse agent comprises the following raw material components in percentage by weight: 20.0-35.0% of industrial additive oil, 15.0-30.0% of asphalt, 7.0-18.0% of sulfonated asphalt, 0.4-0.8% of dodecyldimethylsulfopropyl betaine, 1.0-2.0% of organic stabilizer, 8.0-15.0% of aviation kerosene and 5.0-42.0% of water. According to the invention, an emulsifying agent is reselected, the organic stabilizer is also added, so that the anti-collapse agent has anti-collapse performance and relatively high storage stability and is capable of avoiding the layering phenomenon; the anti-collapse agent can be used for obtaining high-quality products by adding relatively few raw materials and has relatively strong anti-frost property; the quality of the products can be regulated within a certain range, and the anti-collapse agent has a wide market popularization value.

Description

technical field [0001] The invention relates to a treatment agent for petroleum drilling fluid, in particular to a zwitterionic emulsified asphalt anti-slump agent for drilling fluid. Background technique [0002] The different well depths, structures and complex geological conditions in each block of Yumen Oilfield have brought technical problems such as lost circulation, diameter shrinkage, collapse, irregular well diameter and difficult protection of fractured oil layers to drilling fluid construction, which seriously restricted drilling and Improvement of the overall benefit of the oil field. Chinese patent: 200410079225.7 discloses a cationic emulsified asphalt anti-slump agent for drilling fluid. Although it can well overcome the above problems, it can effectively inhibit the hydration of mud shale and the collapse of hard and brittle formations, and significantly improve the lubrication performance of drilling fluid and the quality of mud cake. , reducing fluid loss...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/03C09K8/575
CPCC09K8/03C09K8/5758
Inventor 张启军林秀香段学容赵学祥
Owner YUMEN OIL FIELD KEDA CHEM
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