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Synthetic method of lubricating fluid loss additive and application method thereof

A fluid loss reducing agent and a synthesis method technology, which are applied in the directions of drilling compositions, chemical instruments and methods, etc., can solve the problems of high salt, high maintenance and treatment cost of drilling fluid, high temperature, etc.

Inactive Publication Date: 2015-04-01
SINOPEC SSC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are many kinds of synthetic polymer fluid loss reducers. These products have good temperature resistance and good compatibility with other polymers, but poor salt resistance and basically no lubricating properties.
In order to meet the needs of drilling, the traditional drilling fluid system needs to add more than two kinds of treatment agents at the same time to ensure the fluid loss control and lubricating performance of the drilling fluid. Due to the wide variety of chemicals used and poor compatibility, resulting The more the drug is used, the more the composition of the drilling fluid system is very complex, and the maintenance and treatment costs are high, and the stability of the system is poor
Especially in the construction process of deep wells, directional wells and horizontal wells, the fluid loss control and lubricity of the drilling fluid are important factors to ensure the stability of the wellbore and reduce the complexity of the downhole. In the traditional method, a large amount of fluid loss control agents and lubricants are added. The practice increases the probability of downhole complex situations
Therefore, in order to improve the poor compatibility of fluid loss reducers and lubricants, the high cost of drilling fluid maintenance and treatment, and solve the problems of high temperature, high salt and friction encountered in drilling work, it is urgent to develop a drilling fluid that can improve the lubricity and at the same time Lubricating and fluid loss reducing agent for drilling fluid with good temperature resistance, pollution resistance, fluid loss reduction and other functions

Method used

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  • Synthetic method of lubricating fluid loss additive and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Synthesis of lubricating fluid loss reducer:

[0024] In the aqueous solution of 100ml, add the acrylic acid (AA) of 30g to obtain 30% acrylic acid (AA) aqueous solution, the same method prepares 30% 2-acrylamido-2-methylpropanesulfonic acid (AMPS) aqueous solution and mix with 30% acrylamide (AM) aqueous solution.

[0025] 17.5mL of 30% acrylic acid (AA) aqueous solution was mixed with 17.5mL of 30% 2-acrylamido-2-methylpropanesulfonic acid (AMPS) aqueous solution, and the temperature of the solution was controlled at 10°C. Neutralize to pH=7 with KOH, add 35 mL of 30% acrylamide (AM) aqueous solution, and add 0.3 g of potassium persulfate.

[0026] Use white oil as the oil phase, put 30mL of white oil into a three-necked flask, add 3.5mL of SP-80, and stir for 20min. The above aqueous solution was slowly added dropwise to the three-necked flask, and the dropwise addition was completed within 10 minutes. During the dropwise addition process, keep stirring and blowin...

Embodiment 2

[0029] As described in Example 1, the difference is:

[0030] 10 mL of 30% acrylic acid (AA) aqueous solution was mixed with 10 mL of 30% 2-acrylamido-2-methylpropanesulfonic acid (AMPS) aqueous solution, and the solution temperature was controlled at 10°C. Neutralize to pH=7 with KOH, add 50 mL of 30% acrylamide (AM) aqueous solution, and add 0.3 g of potassium persulfate.

[0031] The dosage of lubricating fluid loss reducer is 0.3%, the API fluid loss is 13.6mL, and the lubrication coefficient is 0.35.

Embodiment 3

[0033] As described in Example 1, the difference is:

[0034] 15 mL of 30% acrylic acid (AA) aqueous solution was mixed with 15 mL of 30% 2-acrylamido-2-methylpropanesulfonic acid (AMPS) aqueous solution, and the solution temperature was controlled at 10°C. Neutralize to pH=7 with KOH, add 40 mL of 30% acrylamide (AM) aqueous solution, and add 0.3 g of potassium persulfate.

[0035] The dosage of lubricating fluid loss reducer is 0.3%, the API fluid loss is 13.2mL, and the lubrication coefficient is 0.29.

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Abstract

The invention relates to the technical field of oil-gas well engineering, specifically to a lubricating fluid loss additive and its synthetic process and application method. The technical scheme is as follows: the synthetic method of the lubricating fluid loss additive comprises the following steps: 1) preparing an aqueous phase solution; 2) preparing an oil phase solution; and 3) slowly adding the aqueous phase solution drop by drop into the oil phase solution for 10-20 min, introducing nitrogen, stirring, and polymerizing for 15min-1h by water bath of 40-65 DEG C after adding dropwise, so as to obtain the lubricating fluid loss additive. By the technical scheme, introduction of the oil phase endows the lubricating fluid loss additive water-soluble polymer with good lubricating property.

Description

technical field [0001] The invention relates to the technical field of oil and gas well engineering, in particular to a method for synthesizing and using a lubricating fluid loss reducing agent. Background technique [0002] In the process of oil drilling, due to the influence of formation high temperature and high-valent ions, the rheology of the drilling fluid often becomes poor or invalid, resulting in a substantial increase in the filtration loss of the drilling fluid, which in turn leads to the occurrence of various downhole complex situations, which seriously affects the drilling operation. cause great difficulty and loss. At the same time, with the popularization and application of directional well and horizontal well drilling technology in complex formations, higher requirements are put forward for the performance of drilling fluid. How to reduce drilling friction and improve the lubrication performance of drilling fluid has become an important key to construction. ...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/06C08F220/58C08F2/32C09K8/035
Inventor 柴金鹏姜春丽张海青严波刘新河李秀灵周辉张涛李琼钟春
Owner SINOPEC SSC
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