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Method for adding chemicals using ground water mixing pipeline

A technology for chemical agents and water pipelines, which is applied in the field of adding chemicals by using ground water mixing pipelines, can solve problems such as easy damage, easy loss, and difficulty in centralized management, and achieve the effect of solving easy damage and stable chemical concentration.

Inactive Publication Date: 2003-11-26
DAQING OILFIELD CO LTD
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  • Summary
  • Abstract
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Problems solved by technology

[0004] In order to solve the above-mentioned problem of unstable drug concentration, the present invention provides a method for adding chemical agents using ground water mixing pipelines. The problem of poor dosing effect under the conditions of crude oil and high wax content
This dosing method also solves the problems of easy damage, easy loss, and difficult centralized management existing in the existing wellhead drip dosing device

Method used

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  • Method for adding chemicals using ground water mixing pipeline
  • Method for adding chemicals using ground water mixing pipeline
  • Method for adding chemicals using ground water mixing pipeline

Examples

Experimental program
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Effect test

Embodiment

[0012] Embodiment: Dosing the prepared medicament into the oil well casing 1 through the dosing pump through the ground water mixing pipeline 5, and the results of field experiments for nearly 10 months are as follows:

[0013] This method was used to test 6 wells, and the dosage of the medicinal solution (clear water) was increased without increasing the medicinal dosage. See attached image 3 As shown, Well Zhong 361-23 has daily fluid production of 64t, oil production of 9t, water cut of 85.6%, submergence degree of 428.29m, pump diameter of Φ56mm, oil pressure of 0.34Mpa, casing pressure of 0.66Mpa. The dose of medicine is 1.35kg / d, and the amount of medicine solution (clear water) is 0.25t / d. After 36 hours of adding the drug, the concentration of the drug solution in the wellhead production fluid was always kept within the effective concentration range.

[0014] See attached Figure 4 As shown, the daily fluid production of Well Zhong 6-Deviation 113 is 55t, oil produ...

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Abstract

The present invention provides the method of utilizing ground water mixing pipeline in adding chemicals for eliminating wax, resisting corrosion and preventing scale in oil well. The amount of water as chemical solvent is increased while maintaining the total chemical amount, so as to stabilize the chemical concentration in the inlet of the oil pump. The present invention solves the problem of poor chemical adding effect in well with high submergence depth, high viscosity raw oil or high wax content, and ensures the stable chemical adding amount in well. The said method may be used to replaceavailable well head dripping method and has the advantages of high wax eliminating, corrosion resisting and scale preventing effect, etc.

Description

Technical field: [0001] The invention relates to a method used in the technical fields of chemical wax removal and anti-wax, anti-corrosion and anti-scaling in oil production wells in oil fields, and belongs to a method for adding chemical agents by using ground water mixing pipelines. Background technique: [0002] In the process of oil production in the oil field, in order to realize the wax-removing, anti-corrosion and anti-scaling functions in the downhole tubing 2 and the downhole pump 3, chemical agents should be added to the casing 1 of the oil well. Any wax-removing, anti-corrosion or anti-scaling agent has A minimum effective concentration, the downhole agent concentration should always be kept above the minimum effective concentration. At present, the conventional wellhead dosing method, the average daily dosing amount is very small (0.1-10kg), due to the small amount of dosing, dosing once every 10 days, adding 10kg of flow improver at a time, so that the medicine...

Claims

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Application Information

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IPC IPC(8): E21B37/06
Inventor 王德民孙智王研刘志庆
Owner DAQING OILFIELD CO LTD
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