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Fluid loss agent and production method thereof

The technology of a fluid loss reducing agent and its production method is applied in the field of acrylamide anti-salt, anti-temperature and anti-fluidizing agent, which can solve the problems of poor anti-salt and anti-temperature effects, etc.

Active Publication Date: 2012-06-27
扬州润达油田化学剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The problem to be solved by the present invention is to provide an acrylamide anti-salt, anti-temperature and fluid loss agent and its production method, which overcomes the shortcomings of conventional anti-salt and temperature-resistant agents. Hot roll down, still has good fluid loss control

Method used

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  • Fluid loss agent and production method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 20 parts of methacrylic acid and 2 parts of water into a three-necked flask, heat to 50°C until the methacrylic acid is completely dissolved, then add 20 parts of N,N-dimethylacrylamide aqueous solution dissolved in 2 parts of water, pour slowly into a three-necked flask, supplemented with 16 parts of water, raised the temperature to 130°C, and stirred for 20 minutes, then added 40 parts of acrylamide, and sealed it with N 2 After 30 min, add 0.5% sodium thiosulfate initiator, adjust the pH to 8.5 with potassium hydroxide, and continue the reaction for 6 hours before stopping the reaction.

Embodiment 2

[0025] Add 20 parts of methacrylic acid and 2 parts of water into a three-necked flask, heat to 50°C until the methacrylic acid is completely dissolved, then add 15 parts of N,N-dimethylacrylamide aqueous solution dissolved in 2 parts of water, and pour slowly Put it into a three-necked flask, add 11 parts of water, raise the temperature to 130°C, and stir for 20 minutes, then add 40 parts of acrylamide, 10 parts of dodecyldimethylbenzyl ammonium chloride, and seal it with N 2 After 30 min, add 0.5% sodium thiosulfate initiator, adjust the pH to 8.5 with potassium hydroxide, and continue the reaction for 6 hours before stopping the reaction.

Embodiment 3

[0027] In the 2.5m equipped with stirrer, condensing reflux device, thermometer and heating mantle 3 In the stainless steel reaction kettle, after heating up to 50°C, add 40 Kg of water and 300 Kg of methacrylic acid, after stirring for 20 minutes, add 400 Kg of N,N-dimethylacrylamide, continue stirring for 20 minutes, and then add 320 Kg of water , while stirring, the temperature was raised to 130°C, after 30min, nitrogen gas was introduced for 30min, sealed, 5Kg sodium thiosulfate and 750Kg acrylamide, 200g potassium hydroxide were added, and kept at 130 + React at 5°C for 6 hours. You can get the finished product.

[0028] After testing, it has the following properties:

[0029] Table 1 Comparison of filter performance of acrylamide fluid loss reducer

[0030]

[0031] Table 2 Comparison of anti-high temperature filter vector performance of acrylamide fluid loss reducer mud

[0032] mud composition fresh water base pulp 0.2%1 # +Fresh water base sl...

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Abstract

The invention relates to an acrylamide salinity and heat tolerance fluid loss agent for drilling mud. A production method comprises the following steps: weighing a certain amount of each monomer according to feeding ratio, putting dissolved methacrylic acid into a reaction container, heating to 45+5 DEG C, adding N, N-dimethylacrylamide dissolved by water, adding more water to specified proportion, heating to 130 DEG C, stirring for 20 minutes, finally adding acrylamide, stirring, after sealing general N for 230 minutes, adding 0.5 percent of sodium thiosulfate initiator, regulating pH to 8.5 through potassium hydroxide, continuously reacting for 6 hours, stop reacting, and cooling to room temperature to obtain a greenish black product. The invention provides the acrylamide salinity and heat tolerance fluid loss agent and the production method thereof, so that the defect that the conventional fluid loss agent has poor salinity and heat tolerance is overcome, and better filtration reducing property can be realized event under the condition of 120 percent of saline basic mud and 150 DEG C hot rolling.

Description

technical field [0001] The invention relates to an acrylamide anti-salt, anti-temperature and fluid loss agent for drilling mud. technical background [0002] The good rheological properties of drilling fluids are achieved through the control and adjustment of rheological parameters. Under certain conditions, the values ​​of each rheological parameter must be maintained in an appropriate range, otherwise a series of adverse consequences will be caused. Drilling fluid filtration vector is an important index to control the rheological properties of drilling fluid, mainly referring to the amount of filtrate to the formation fluid loss layer and the quality of the filter cake formed on the wellbore wall. Evaluation method: within a certain period of time, the amount of water lost is called water loss (or fluid loss), and the standard method specified by API can be used to measure fluid loss, which refers to a certain temperature and pressure within 30 minutes (0.689MPa, that is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/03
Inventor 胡琦
Owner 扬州润达油田化学剂有限公司
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