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Biological enzyme fracturing cleaner and application thereof

A fracturing cleaning agent and biological enzyme technology, which is applied to drilling compositions, chemical instruments and methods, etc., can solve problems such as energy consumption, increase production costs, environmental hidden dangers, etc., and achieve the effect of improving the performance of glue

Active Publication Date: 2015-07-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the chemical modification technology of vegetable glue, the raw materials used and the intermediate reaction process require the participation of a large amount of organic solvents, among which, the propylene oxide and ethylene oxide required for hydroxypropylation and hydroxyethylation reactions It is a dangerous and explosive product, which greatly increases the safety risk of production; isopropanol is often used as a solvent in the synthesis reaction, and it must be separated by multiple elutions after the reaction, which not only consumes energy, but also causes accidents due to careless disposal. Leakage can cause huge environmental hazards
Caustic soda, glacial acetic acid, etc. are also potential environmental pollutants as pH regulators, and at the same time, increase production costs to a certain extent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Using cellulase, pentosanase and pectinase produced by Novozymes as raw materials, a compound biological enzyme solution with a weight content of 10% Carezyme4500L, 10% Pentopan MonoBG2500F and 10% Pectin16000U was prepared for use.

[0023] Add 500mL of water to the Wuyin mixer, keep the rotation speed at 1000r / min, add 0.5mL of the above compound biological enzyme solution, add 5.0g of potassium chloride, then slowly add 1.5g of coumarin, stir for 5 minutes, and then add 0.1 mL of demulsifier and 0.1 mL of drainage aid, and continue to stir for 2 minutes, then transfer the prepared fracturing fluid base fluid into a beaker, and place it in a 30°C water bath for 4 hours. Example 2

Embodiment 2

[0024] Using cellulase, pentosanase and pectinase produced by Genencor as raw materials, a compound biological enzyme solution with a weight content of 12% Promafast200, 12% Laminex and 12% P200 was prepared for use.

[0025] Add 500mL of water to the Wuyin mixer, keep it at 1000r / min, add 1.0mL of the above compound biological enzyme solution, add 5.0g of potassium chloride, then slowly add 1.5g of coumarin, stir for 5 minutes, then add 0.1mL of broken Emulsion and 0.1mL drainage aid, continue to stir for 2 minutes, then transfer the prepared fracturing fluid base fluid into a beaker, and place it in a 30°C water bath for 4 hours.

Embodiment 3

[0027] Using cellulase, pentosanase and pectinase produced by AB Enzyme Industry in Germany as raw materials, a compound biological enzyme solution with a weight content of 15% of KRX-300, 15% of Finase L and 15% of Pectina was prepared for use .

[0028] Add 500mL of water to the Wuyin mixer, keep it at 1000r / min, add 1.5mL of the above compound biological enzyme solution, add 5.0g of potassium chloride, then slowly add 1.5g of coumarin, stir for 5 minutes, then add 0.1mL of broken Emulsion and 0.1mL drainage aid, continue to stir for 2 minutes, then transfer the prepared fracturing fluid base fluid into a beaker, and place it in a 30°C water bath for 4 hours.

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PUM

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Abstract

The invention provides a biological enzyme fracturing cleaner. The biological enzyme fracturing cleaner is prepared from cellulase, pentosanase, pectase and water, and preferably 10-20wt% of cellulase, 10-20wt% of pentosanase, 10-20wt% of pectase, and the balance of water. An application of the biological enzyme fracturing cleaner is characterized in that the biological enzyme fracturing cleaner is added to fluid preparation water before a fracturing fluid base fluid is prepared, and various additives of the fracturing fluid base fluid are added according to formula requirements in order to form an adhesive which is used as a fracturing fluid. The cleaner has the advantages of selective removal of water-insoluble substances in the fracturing fluid base fluid, overlapping of the reaction time with plant glue hydration dissolving time, no need of special modifying treatment technologies of plant glue, improvement of the performance of treated glue, safety, environmental protection and high efficiency.

Description

technical field [0001] The invention relates to a biological enzyme fracturing cleaning agent and its application. Background technique [0002] The vegetable gums used in the petroleum industry are mainly galactomannan (Poly-galactomannan, PGM) polysaccharides and their derivatives. Galactomannan is a polysaccharide consisting of mannose backbone and galactose side chains. More precisely, galactomannan is connected by threads (1,4-β-D-mannose Sugar, β-1,4-D-mannopyranose) main chain and 1,6-α-D-galactose polysaccharide connected to the main chain, that is, 1,6-linked α-D-galactopyranose ( α-1,6-D-galactopyranose) side chain. According to the ratio of mannose to galactose, the types of galactomannan are arranged from small to large: Fenugreek gum, mannose to galactose is about 1:1, Guar gum and Tian Sesbania Gum, mannose to galactose about 2:1, Tara gum, mannose to galactose about 3:1, locust bean gum or carob gum ( Carob gum), the ratio of mannose to galactose is about ...

Claims

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Application Information

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IPC IPC(8): C09K8/68
CPCC09K8/68C09K8/905C09K2208/26
Inventor 郑承纲龙秋莲赵梦云李萍史爱萍张锁兵张大年高媛萍
Owner CHINA PETROLEUM & CHEM CORP