Bio-enzyme treating agent for oil field and preparation method and application thereof

A biological enzyme and treatment agent technology, applied in the direction of chemical instruments and methods, earthwork drilling, drilling composition, etc., can solve the problems of scrapped production cost, production efficiency decline and increase of production oil and water wells, and meet the requirements of reaction conditions The effect of not high, prolonging the service life and improving production efficiency

Active Publication Date: 2021-02-26
西安长庆化工集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the present situation above, the present invention provides a biological enzyme treatment agent for oilfields and its preparation method and application, which are used to solve the problem of oil well shafts and technical pipe networks due to scaling. Wax causes a decrease in production efficiency, and the fouling of the production and injection pipe network causes the production of oil and water wells to be scrapped or the production cost to increase

Method used

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  • Bio-enzyme treating agent for oil field and preparation method and application thereof
  • Bio-enzyme treating agent for oil field and preparation method and application thereof
  • Bio-enzyme treating agent for oil field and preparation method and application thereof

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preparation example Construction

[0040] The present invention also provides a preparation method of a biological enzyme treatment agent for oilfields, comprising: sequentially adding biological enzymes, polycarboxylic acid dispersants, penetrants, modifiers and water into the reaction kettle at a temperature of 58 to After stirring for 6-8 hours under the conditions of 62° C. and a rotating speed of 300 r / min to 400 r / min, the mixture is cooled to room temperature to obtain the biological enzyme treatment agent for oilfields.

[0041] The present invention also provides the application of the biological enzyme treatment agent for oil field, which is used for the comprehensive treatment of corrosion, scaling and waxing of wellbore or gathering and transportation system. The biological enzyme treatment agent used in the oil field is added to the annulus of the oil well or the agent is pumped into the gathering and transportation system by the dosing tank. Preferably, the added amount of the oilfield biological ...

Embodiment 1

[0066] The invention provides a biological enzyme treatment agent for oil fields. The raw material composition of the bio-enzyme treatment agent for oil fields includes: sequentially adding 30% bio-enzyme, 40% triethylene tetramine hexamethylene phosphonic acid, 2% environment-friendly penetrant JFC, 10% modifier polyethylene emulsion HA-soft80 and 18 % water. Turn on the stirring device of the reactor, set the rotation speed at 300r / min-400r / min, heat to 60°C±1°C, stir for 6 hours, then cool down to room temperature to obtain the biological enzyme treatment agent for oil field.

[0067] Since 2012, in a block of Jiyuan oilfield, wellbore corrosion and scaling have appeared year by year. The pipelines of the gathering and transportation system in the Ji 28 transfer station have been repaired twice a year on average, and the pipelines of the water injection system have been repaired 18 times a year on average, seriously affecting crude oil production.

[0068] Table 1 shows th...

Embodiment 2

[0079] The invention provides a biological enzyme treatment agent for oil fields. The raw material composition of the bio-enzyme treatment agent for oil fields includes: sequentially adding 35% bio-enzyme, 23% triethylene tetramine hexamethylene phosphonic acid, 12% environment-friendly penetrant JFC, 15% modifier polyethylene emulsion HA -soft80 and 18% water. Turn on the stirring device of the reactor, set the rotation speed at 300r / min-400r / min, heat to 60°C±1°C, stir for 8 hours, then cool down to room temperature to obtain the biological enzyme treatment agent for oil field.

[0080] The performance of the above-mentioned oilfield biological enzyme treatment agent of the present embodiment has been tested indoors, and its quality technical test of the oilfield biological enzyme treatment agent is as follows in table 4:

[0081] Table 4 oil field biological enzyme treatment agent performance test results

[0082] Test items Test results Calcium carbonate...

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Abstract

The invention discloses a preparation method and application of a bio-enzyme treating agent for an oil field, and the bio-enzyme treating agent for the oil field comprises the following components inpercentage by mass: 30-35% of bio-enzyme, 40-45% of polycarboxylic acid dispersing agent, 2-3% of penetrating agent, 10-14% of modifier and the balance of water. The bio-enzyme treating agent for theoil field is mainly used for an oil field oil production well shaft and a gathering and transportation pipeline system, can effectively inhibit adsorption scaling of CaCO3, CaSO4, BaSO4, Fe2O3, FeS, clay mud and organic scale in the shaft and an oil transportation pipeline, can effectively consume oxygen molecules in produced liquid, and reduces electrochemical corrosion caused by ions such as HCO3-, hydrogen sulfide, Cl- and SO4 < 2- >. Scaling, wax deposition and corrosion degrees of oil well and mine field gathering and transportation pipelines are effectively reduced, the replacement frequency of the oil field gathering and transportation pipelines and facilities is reduced, the service life of the gathering and transportation pipelines is prolonged, and the oil well pump inspection period is prolonged.

Description

technical field [0001] The invention belongs to the technical field of water flooding and oil production in oilfields, and in particular relates to a biological enzyme treatment agent for oilfields and its preparation method and application. Background technique [0002] Changqing Oilfield is located in the Ordos Basin, on the Loess Plateau, where water resources are extremely scarce. Most of the mining blocks have insufficient groundwater and no surface water available. The Changqing Oilfield is a typical low-permeability oilfield, mainly developed by water injection, and the oil production of water injection reservoirs accounts for more than 90% of the total oil production. There are prominent contradictions between water flooding and oilfield development. On the other hand, the comprehensive water cut of Changqing Oilfield is currently as high as 51.7%, and the annual water output is as high as 30 million tons. [0003] The salinity of produced water is generally high, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/528C09K8/54
CPCC09K8/528C09K8/54
Inventor 郝世英王伟波李爱辉刘贵宾万华杨海燕张庆祝王海军杨宏科沈燕鸿连宇博赵静李雅俐窦淼李玥
Owner 西安长庆化工集团有限公司
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